Background Of Fertilizers Research Articles

Breeding peculiarities of the manifestation of hemp fiberness signs

Aim. To establish the genetic features of the manifestation of signs of fibrousness and yield of stems, depending on growing conditions and harvesting periods. Methods. New methods were applied: "Method of evaluation of hemp plants for the presence of cannabinoids", "Method of evaluation of individual plants of monoecious hemp varieties by fiber content at the beginning of flowering", "Method of creation of hybrid breeding material of monoecious hemp". Results. It was established that the main conditions for obtaining the maximum amount of fiber and its quality indicators are the use of the late-ripening variety Hlukhivski 51, sowing with a feeding area of 15x5 cm, the diameter of the stems 6-8 mm, the sowing rate of 75 kg/ha (4.2 million pcs./ha) against the background of increased fertilization. Conclusions. The genetic features of the Hlukhivski 51 variety are high fibrousness and high yield of the stems, which are maximally manifested by observing the conditions of the feeding area of 15x5 cm, the sowing rate of 75 kg/ha (4.2 million pieces/ha) and the increased background of fertilization (N120P90K90). Expansion of the response of genotypes of late-ripening varieties to the level of dry biomass yield of 20 t/ha occurs with a feeding area of 50x5 and 50x10 cm and increased doses of N150P120K120 fertilizers. This can become the basis for the use of hemp for bioenergy purposes. When growing production crops for fiber in order to speed up harvesting, an important factor is the start of harvesting at an earlier time, and therefore we recommend growing two varieties of hemp: early-ripening (technical maturity occurs 2 weeks earlier than late-ripening varieties) and late-ripening varieties of hemp.

The Effect of Organic and Mineral Substances on the Productivity and Quality Indicators of Rice in Lankaran

The study of different rice varieties, determination of their compatibility with soil and climatic conditions is the most important direction in the development of agricultural science. In 2022, research work was carried out on three rice varieties in the village of Shikhakaran, Lankaran district: Govhar (regional), Sarykiprik (local) and Avangard (improved). Soil samples were collected and analyzed taking into account the introduction of various organic fertilizers, including nitrogen, phosphorus and potassium in five variants and three replicates. Phenological observations were carried out and the qualitative and quantitative indicators of plants were studied. According to the results obtained, it can be noted that rice growth varies from 109.3 to 148.0 cm, plant bushing is 6.7-15.5 cm. The highest bushing was noted against the background of mineral fertilizer in the Govhar variety. The length of the lateral shoots is at least 21.5 cm, maximum 25.2 cm. Accordingly, the number of grains on the lateral shoots is 56.0-109.4 pcs. On the lateral shoots, the highest indicator was observed in the Govhar variety — 2.0-5.2 g. The productivity of the Govhar variety against the background of mineral fertilizers was 25.5 g, and for the Avangard variety — 23.3 g. The thousand seed weight is 23.2-33.1 g, and the Govhar, Sarykiprik, Avangard varieties were distinguished by relatively high indicators against the background of mineral fertilizer. In grains, in terms of protein content, against the background of organic fertilizer, the Govhar variety was 9.03%, against the background without fertilizer, the Sarykiprik variety - 9.3%, against the background of organic and mineral fertilizer, the Avangard variety — 8.87%. No differences in the amount of sugar in seeds were found between the varieties.

Effect of Phosphorus and Magnesium Fertilizers on Mineral Nutrition and Yield of Winter Wheat depending on Liming of Sod-Podzolic Soil

In long-term field experience on strongly acidic, poorly cultivated sod-podzolic soil, high efficiency of phosphorus fertilizers combined with magnesium and liming in the cultivation of winter wheat of the Moskovskaya 56 variety was revealed. Under these conditions, the content of nitrogen, phosphorus and magnesium in plants in the flowering phase increased. Improving the mineral nutrition of plants in this case provided the highest yield (75.3 c/ha), exceeding the background level of nitrogen-potassium fertilizers by 2.7 times, the payback of mineral fertilizers (NPK) increased by 2.5 times, reaching 16.7 kg/kg. The use of phosphorus fertilizers on highly acidic soil increased yields by 65% at 27.5 c/ha against the background of nitrogen-potassium fertilizers. On calcified soil with a slightly acidic reaction of the medium, the yield from the use of phosphorus fertilizers increased by 19% compared to the background of 58.1 kg/ha. Yield increases when using magnesium fertilizers against the background of full fertilizer (NPK) decreased as soil acidity decreased and were significant: on medium acidic soil – 4.9 and slightly acidic – 6.1 c/ha. At the maximum yield of winter wheat, due to the use of phosphorus and magnesium fertilizers and a decrease in the acidity of sod-podzolic soil, the removal of nutrients by the winter wheat harvest increased: nitrogen – by 3.5, phosphorus – 3.7, potassium and magnesium – 3 times.

ВЛИЯНИЕ МЕТЕОРОЛОГИЧЕСКИХ ПОКАЗАТЕЛЕЙ НА УРОЖАЙНОСТЬ ОВСА В СЕВООБОРОТАХ

The studies were carried out to assess the influence of predecessors in crop rotations and nutrition background on the formation of oat yields under different weather conditions. The work was carried out in a stationary two-factor experiment in 2016–2020 in the conditions of the Middle Urals on dark gray heavy loamy soil. The experimental design included the following options: crop rotation (factor A) – green manure (green manure fallow (rapeseed), wheat, oats, peas, barley), grain-grass rotation with a share of legumes of 40% (peas, wheat + clover, clover 1 g.p., barley, oats); background nutrition (factor B) – without mineral fertilizers (control); N30P30K36 (on average per 1 ha of crop rotation area - mineral background); N24P24K30 in combination with green manure and straw (organomineral background). The lowest harvest of oat grain was noted in 2016 in severely arid conditions (GTC = 0.63); it varied depending on the predecessor and nutritional background from 1.30 to 1.70 t/ha. The highest productivity of grain fodder crops was observed in 2017-2018 with a hydrothermal coefficient of 1.8...2.0. In the control variant, it varied in the range from 3.09 to 3.69 t/ha, when applying fertilizers – 4.20…5.52 t/ha. In slightly dry conditions in 2020, the productivity of oats in crop rotations in the control was lower than under favorable weather conditions by 30%, and against the background of fertilizers - by 24...33%. In general, the productivity of the grain forage crop in the control depended little on the predecessor in crop rotations. The placement of oats as a second crop after clover on mineral and organomineral nutrition backgrounds ensured a noticeable increase in grain harvest in relation to green manure crop rotation (the second crop after plowing rapeseed), with the exception of 2016. On average, over the years of research, the increase in oat grain in grain-grass crop rotation was 0. 55…0.56 t/ha. The correlation between the productivity of grain fodder crops and the amount of precipitation and the GTC value was positive (r=0.82...0.95), and with the temperature regime during the growing season - negative (r=-0.88...-0.97).

Efficiency of foliar additional fertilizing of corn at different periods of application

The studies were carried out on ordinary carbonate chernozem in the zone of sufficient moistening in the Stavropol region in 2021–2023. The effectiveness of foliar additional fertilizing with fertilizer Batr Zinc (1.0 l/ha) was studied on corn hybrids Mashuk 220 MV and Mashuk 355 MV in the 5 and 8 leaves phases. Additional fertilizing was carried out on a background without any mineral fertilizing, as well as backgrounds of nitrogen (N30) and complete mineral fertilizing (N30P30K30). Data were obtained on the terms influence of foliar additional fertilizing with fertilizer Batr Zinc on the corn plants height, the yield of green mass and grain, and crop structure elements. Foliar additional fertilizing of corn in 5 or 8 leaves phases with fertilizer Batr Zinc at a dose of 1.0 l/ha had a positive effect on plants growth. Without the use of mineral fertilizers in the flowering phase, the plants height of the hybrid Mashuk 220 MV increased on average for 2021–2023 by 14 and 16 cm, hybrid Mashuk 355 MV – by 17 and 23 cm. On average, over 3 years without the use of mineral fertilizers, corn fertilizing in the phases of 5 or 8 leaves with fertilizer Batr Zinc increased the yield of green mass of the hybrid Mashuk 220 MV by 5.2 and 6.0 t/ha (15.1 and 17. 4 %), hybrid Mashuk 355 MV – by 7.7 and 6.8 t/ha (23.2 and 20.5 %). Depending on the fertilizing terms, the grain yield of the hybrid Mashuk 220 MV increased by 0.59 and 0.63 t/ha (9.2 and 9.9 %), of the hybrid Mashuk 355 MV – by 0.83 and 0.74 t/ha (12.9 and 11.5 %). There was no significant difference in the yield of green mass and grain between the fertilizing terms. Against the background of mineral fertilizers, foliar additional fertilizing with the agrochemical Batr Zinc was ineffective.

Sustainability improvement of grain productivity of beet crop rotations in the foreststeppe of the Central Blackearth region

The purpose of the current study was to identify the effect of various crop rotations and rates of application of mineral fertilizers on productivity of winter wheat and spring barley, the productivity of crop rotations and the economic efficiency of cultivating crops. The study was carried out in a stationary field trial of the FSBSI “Kursk FARC” on typical heavy loamy blackearth (chernozem) in 2015–2023. Agricultural crops were grown in three crop rotations: 1 – grainrow fallow (black fallow, winter wheat, sugar beets, maize for silage, barley); 2 – grain-row green manure fallow (green manure fallow, winter wheat, sugar beets, maize for silage, barley); 3 – crop rotation (horse-bean for grain, winter wheat, sugar beets, white lupine for grain, barley). During the trial there have been compared two contrasting levels of mineral fertilizer application N30Р30К30 and N52Р52К52 per hectare of crop rotation area. The non-marketable portion of the harvest of all crops was used as fertilizer. Agricultural technology was generally conventional for the area. There has been established that, under all weather conditions, the highest yield of winter wheat at a low background of fertilization (N30Р30К300 per hectare of crop rotation area) is produced in green manure fallow, and at a high background of fertilization (N52Р52К52 per hectare of crop rotation area) in black fallow. There was found that the most favorable conditions for cultivating barley were created when cultivating with white lupine for grain. Fertilization increase led to productivity increase of the grain crops, but, at the same time, to a production profitability decrease. There has been determined that productivity of crop rotations with fallow forecrops is 14 % higher compared to crop rotations with a legume forecrop (horse-bean for grain). According to calculations, on average over the years of study, the most profitable was the winter wheat cultivation in black fallow, and spring barley cultivation in white lupine for grain. At the same time, the indicator of production profitability level decreased with an increase in the rate of mineral fertilizing, which results in production costs’ increase.

EFFECT OF FOLIAR FEEDING OF POTASSIUM FERTILIZER ON THE NUMBER OF STEM AND STORAGE RATE OF HEMP VARIETY “UZBEK-2268”

In this article, the effect of foliar feeding of potassium fertilizer on the background of mineral fertilizers on the number of stems and the level of preservation of hemp variety “Uzbek-2268” has been proven. Against the background of mineral fertilizers in the experiment, potassium mineral fertilizer was applied to the level of preservation of the number of stems at the end of the vegetation period in the variant given at 48 kg/ha in the phases of 2-3 true leaves of the hemp plant, budding-flowering and flowering-fruiting, it was found that it was 171.2 thousand bushes/ha, showing a high result compared to the options.

The Use of Magnesium Fertilizer Can Improve the Nutrient Uptake, Yield, and Quality of Rice in Liaoning Province

In this study, the effects of the soil application and foliar spraying with magnesium fertilizers on rice yield and quality in Liaoning Province were investigated. Field experiments were conducted at Kaiyuan, Xinmin, and Dawa in 2022 and 2023. Magnesium fertilizers were used in the soil as magnesium sulfate monohydrate and silicon–magnesium fertilizer and on leaves was magnesium sulfate heptahydrate. The results showed that the application of 12 kg magnesium hm−2 in the soil at the Kaiyuan site can significantly increase rice yield by 14.8% compared with sites without magnesium fertilizer. The use of silicon–magnesium fertilizer showed a more obvious yield increase of 22.2%. The application of 3 kg magnesium hm−2 or 6 kg magnesium hm−2 on the leaf surface increased the rice yield at Kaiyuan by 19.4% and 21.6% and at Xinmin by 17.8% and 5.4%, respectively. The yield increase was more significant under the optimal fertilization treatment compared with the conventional fertilization treatment. The application of magnesium fertilizer increased the magnesium, nitrogen, and phosphorus contents in rice shoots and the potassium and crude protein contents in rice grains. The effect of foliar spraying with magnesium fertilizers was more obvious than soil application. Therefore, the magnesium fertilizer used on the leaf surface plays an important role in improving rice yield and quality in rice-growing areas with relatively rich soil magnesium content. Magnesium fertilizer can compensate for the yield decrease caused by the reduced use of nitrogen and phosphorus fertilizers by promoting nitrogen and phosphorus absorption in rice. Conclusively, the application of magnesium fertilizer is a promising measure to improve rice production in Liaoning province under a reduced nitrogen and phosphate fertilizer background.

(234) The Effect of Cigarette Smoking Cessation on Semen Quality

Abstract Introduction Extensive research efforts have always focused on the deleterious effects of smoking on male reproduction by comparing fertility in smokers versus nonsmokers. Nevertheless, studies on the effect of smoking cessation on male fertility remain scarce. Objective Our primary aim was to investigate the reversibility of the negative impact of smoking on male fertility. Secondarily, we studied the effect of both time after smoking cessation as well as the smoking index on semen quality improvement. Methods Our study included 60 participants who applied to a smoking cessation program. The volunteers started by completing a fertility background questionnaire. Two semen specimens, provided 2 weeks apart, were analyzed according to the WHO guidelines for each candidate on three different occasions. The first was right before smoking cessation followed by the 2nd and 3rd at 3 and 6 months after stopping smoking, respectively. Semen quality was compared between the 3 occasions. The degree of change was correlated with the level of smoking. The nicotine level in urine was used for smoking cessation compliance monitoring during the study. Results Comparing semen quality on the 3 different occasions respectively, we detected a significant improvement in semen volume (3.33 ml ± 1.07 vs. 3.88 ml ± 0.80 vs. 4.34 ml ± 0.67, P < 0.001), sperm concentration (14.77 million /ml ± 6.49 vs. 17.71 million/ml ± 6.41 vs. 19.27 million/ml ± 6.46, P < 0.001), total sperm count (49.33 million ± 25.31 vs. 70.16 million ± 30.85 vs. 84.01 million ± 31.00, P < 0.001), progressive motility (20.7% vs. 35.3% vs. 42.28%, P < 0.001), total motility (41.48% vs. 60.33% vs. 67.67%, P < 0.001) and abnormal morphology (69.32% Vs. 50.88% vs. 40.82%, P < 0.001). Improvement in all parameters was positively correlated to time after cessation. Higher smoking indices were related to higher levels of improvement in semen volume, sperm concentration, and total count (areas under the curve of 0.867, 0.852, and 0.863 respectively, P < 0.001 for each). Conclusions The negative effect of smoking on semen quality is reversible. Smoking cessation has a time-dependent positive effect on main semen parameters, hence, positive potential for fecundity improvement in men. Disclosure No.

Relationship between mineral fertilization, plant macro- and microelement contents and yield of wheat (Triticum aestivum L.)

Abstract. The effectiveness of mineral fertilization on wheat productivity was determined in a field experiment on Alluvial-meadow soil (Fluvisol, FAO 2015) at the experimental field of Tsalapitsa village, Plovdiv region, during 2019-2020. Four increasing rates of nitrogen fertilization along with a constant background of phosphorus fertilization were tested in the following variants: N40P100; N80P100; N120P100; N160P100, and N0P0 (control) – without any fertilization. The influence of these variants on yield and the content of basic macro- and microelements in wheat’s dry biomass were assessed. Plant samples were collected at the full maturity phase of wheat, with each variant sampled in triplicate, to determine the concentrations of N, P, K, Ca, Mg, Cu, Zn, Mn, and Fe. Correlation analysis and analysis of variance (ANOVA) were employed to identify dependencies between observed variables. Significant differences between the variants for N% content in grain, chaff and straw of wheat were established. The highest nitrogen values were observed in the grain of the N160P100 and N120P100 variants, at 2.10% and 2.02%, respectively. The applied fertilization had a significant positive effect on the accumulation of potassium, calcium, copper, manganese and iron in wheat biomass. This finding was supported by the correlation coefficients between fertilizer rates and N (R = 0.948), Ca (R = 0.854), Cu (R = 0.681), Mn (R = 0.735), and Fe (R = 0.769) in the wheat grain. Significant yield differences were observed among the variants, with the highest yield recorded for N120P100 (7123.0 kg/ha), more than tripling that of the control variant. The uptake of nitrogen, phosphorus and potassium by the total biomass of wheat increased depending on the fertilization rates and it was the highest in the N120P100 variant.

Hebraic, the emerging new variety among Palestinians in Israel: Characteristics and sociolinguistic reflections

Language is not abstracted from reality but responds to emerging changes. Arabic-Hebrew contact among Palestinians in Israel offers a fertile background for a study of sociopolitical conflicts, given the unique civil and national status of Palestinian citizens of Israel, a polity defined and perceived as a Jewish state. The current article focuses on Arabic-Hebrew contact in Israel. More specifically, it describes Hebraic, the formation of a “new variety” – Arabic mixed with Hebrew in the linguistic repertoire of Palestinian Arabs, citizens of Israel. The linguistic characteristics and the motives that led to its creation are described. The sociolinguistic reflections in relation to identity are introduced to provide explanations for its formation and its meaning.

(078) The Effect of Smoking Cessation on Semen Quality

Abstract Introduction Extensive research efforts have always focused on the deleterious effects of smoking on male reproduction by comparing fertility in smokers versus nonsmokers. Nevertheless, studies on the effect of smoking cessation on male fertility remain scarce. Objective Our primary aim was to investigate the reversibility of the negative impact of smoking on male fertility. Secondarily, we studied the effect of both time after smoking cessation as well as the smoking index on semen quality improvement. Methods Our study included 60 participants who applied to a smoking cessation program. The volunteers started by completing a fertility background questionnaire. Two semen specimens, provided 2 weeks apart, were analyzed according to the WHO guidelines for each candidate on three different occasions. The first was right before smoking cessation followed by the 2nd and 3rd at 3 and 6 months after stopping smoking, respectively. Semen quality was compared between the 3 occasions. The degree of change was correlated with the level of smoking. The nicotine level in urine was used for smoking cessation compliance monitoring during the study. Results Comparing semen quality on the 3 different occasions respectively, we detected a significant improvement in semen volume (3.33 ml ± 1.07 vs. 3.88 ml ± 0.80 vs. 4.34 ml ± 0.67, P < 0.001), sperm concentration (14.77 million /ml ± 6.49 vs. 17.71 million /ml ± 6.41 vs. 19.27 million/ml ± 6.46, P < 0.001), total sperm count (49.33 million ± 25.31 vs. 70.16 million ± 30.85 vs. 84.01 million ± 31.00, P < 0.001), progressive motility (20.7% vs. 35.3% vs. 42.28%, P < 0.001), total motility (41.48% vs. 60.33% vs. 67.67%, P < 0.001) and abnormal morphology (69.32% Vs. 50.88% vs. 40.82%, P < 0.001). Improvement in all parameters was positively correlated to time after cessation. Higher smoking indices were related to higher levels of improvement in semen volume, sperm concentration, and total count (areas under the curve of 0.867, 0.852, and 0.863 respectively, P < 0.001 for each). Conclusions The negative effect of smoking on semen quality is reversible. Smoking cessation has a time-dependent positive effect on main semen parameters, hence, positive potential for fecundity improvement in men. Disclosure No.

Влияние севооборотов на плодородие выщелоченных чернозёмов Южного Урала

Abstract. The purpose of the research was to establish the degree of influence of crop rotations and mineral nutrition backgrounds on the fertility of leached chernozem. A comparative assessment of the main nutrition elements of humus, nitrogen of easily hydrolyzable, mobile phosphorus of plants in dynamics in the conditions of the northern forest-steppe of the Chelyabinsk region, in various crop rotations on two fertilization backgrounds P and NP was carried out. Methods. The research was carried out in a long-term field experiment on the land-use territory of the Chelyabinsk Research Institute from 1998 to 2021. Humus, total nitrogen and easily hydrolyzable nitrogen were determined in soil samples according to the method of I. V. Tyurin and M. M. Kononova in the modification of V. N. Kudeyarov, mobile phosphorus according to F. V. Chirikov. Results. According to the results of our research, it was found that, on average, over the years of observations 1998–2021, the humus content due to the crop rotation factor changed by 0.2 %, according to the fertilization backgrounds by 0.8 %. The nitrogen content of the total over the years of research increased in all crop rotation options from 20 to 55 %, regardless of the background fertilization. As a result of the conducted studies, it was found that the nitrogen content of the easily hydrolyzed significantly depends on the background of mineral nutrition and the conditions of the year, on average for 1998–2021, the decrease in nitrogen of the easily hydrolyzed was 17–22 %. On average, according to the variants of the experiment for 1998–2021, the process of assimilation of liquid phosphorus against the background of NP is more intensive by 8 %. A strong correlation was established between the productivity of crop rotations and total nitrogen against the background of P in 1998 and 2013, nitrogen easily hydrolyzed in 1998 and 2021, mobile phosphorus for all the years of research. The scientific novelty. Monitoring of the assessment of the state of soil fertility makes it possible to monitor, as well as diagnose the degree of anthropogenic impact, make appropriate adjustments to ensure high productivity of crop rotations in a changing climate.

Влияние бобовых культур и удобрений на продуктивность севооборотов и плодородие почвы

Abstract. The purpose of researches is influence legume crops and mineral fertilizers on crop rotation productivity and soil fertility elements in the conditions of Kaluga region. Methods. The research was carried out in a long-term stationary field experiment on gray forest medium loamy soil. The laying of field experience, observations, records and generalization of research results were carried out in accordance with generally accepted methodological recommendations. Results. It was found that the studied factors had an insignificant effect on the weed propensity, which, against the background of mineral fertilizers and with an increase in the share of legumes in the structure, was slightly higher. On average, during the fourth rotation, the highest crop productivity was obtained in a crop rotation with 40% saturation with legumes, both against the background of fertilization (38.6 c/ha of grain units) and without their use (32.6 c/ha of grain units). Applying of mineral fertilizers contributed to an increase in crop rotation productivity by 18–24 %. On average, for crop rotations, 6.4 c/ha of grain units or 22 % were obtained by applying mineral fertilizers in addition to a background without fertilizers. It’s noted that use of mineral fertilizers had a positive effect on the change some indicators of soil fertility. Availability of exchangeable forms potassium increased by 27 % and mobile phosphorus by 54 % compared to options without fertilizers. And in comparison with the initial state, the content of K2O without fertilizers increased by 17 and by 54 mg/kg of soil against the background of their use, and the content of P2O5 decreased by 27 mg/kg of soil and increased by 66 mg/kg, respectively. With an increase in the share of legumes in the structure of crop rotations from 30 % to 60 %, there was a slight increase in soil fertility, especially against the background of mineral fertilizers. Scientific novelty. The issues of influence legumes and mineral fertilizers on productivity of the fourth rotation of crop rotations and elements soil fertility were considered.

ВЛИЯНИЕ ПРИЕМОВ ВОЗДЕЛЫВАНИЯ НА УРОЖАЙНОСТЬ И ВОДОПОТРЕБЛЕНИЕ ГОРОХА В УСЛОВИЯХ РОСТОВСКОЙ ОБЛАСТИ

Purpose: to identify an effective combination of primary soil tillage methods, fertilizer background, water consumption features at different sowing dates and their influence on the yield of new pea varieties in Rostov region. Materials and methods. The research was carried out in 2022–2023 at the experimental stationary of the scientific center. The following were studied: basic soil tillage methods (plowing, combined, chiseling) (factor A); fertilizer backgrounds: 1) without fertilizers, 2) Р₄₀K₄₀, 3) P₆₀K₆₀, 4) P₈₀K₈₀, 5) N₁₅Р₄₀K₄₀, 6) N₃₀P₈₀K₈₀ (factor B). Sowing was carried out in two stages. Soils are ordinary chernozem. Results. Higher yields were obtained in the variants of the 1st sowing date, regardless of cultivation and fertilizers. The increase was 6.3–6.8 % for the Donets and 6.9–8.4 % for the Amulet varieties, compared with the data for the 2nd term. A decrease in yield was noted with combined and chisel tillage, regardless of the fertilizer background and sowing dates; it was 6.0–6.3 and 5.2–5.3 % for the Donets and Amulet varieties, respectively; 4.9–5.2 and 3.5–4.7 %, compared with plowing (factor A). The highest pea yield according to factor B was provided by the N₃₀P₈₀K₈₀ variant: 3.03 and 2.86 t/ha for the Donets varieties, 2.56 and 2.39 t/ha for the Amulet varieties. The yield increases reached 0.89–0.93 t/ha (44.3–45.2 %) and 0.67–0.71 t/ha (38.3–38.9 %), respectively, compared to the control. The difference in average yield between the P₈₀K₈₀ and N₃₀P₈₀K₈₀ variants did not exceed 0.09–0.13 t/ha for the Donets variety and 0.03–0.06 t/ha for the Amulet variety. Conclusions. The best average yield was obtained in the variant with plowing and N₃₀P₈₀K₈₀ nutrition at the first sowing period in 2023, amounting to 3.72 t/ha for the Donetsk variety and 2.91 t/ha for the Amulet variety. The lowest water consumption coefficient of peas was also noted here – 804 m³/t.

The effectiveness of the combined use of zinc, boron, and magnesium on tea plantations in the humid subtropics of Russia

It was found that the simultaneous root application of zinc, boron and magnesium against the background of macro fertilizers in the studied period 2011-2023 provided a stable increase in yield. The yield of tea leaves was on average 28% higher than the control (5.9 and 4.6 t/ha, respectively). In favorable years, the studied variant showed a significant increase in yield by 32% compared to the control one. The yield in more difficult weather conditions (spring frosts and summer drought) on the variant of joint root application of elements (Zn+B+Mg) against the background of macro fertilizers averaged 3.9 t/ha, which was 22.3% higher than the control. During these years, one of the key factors determining the productivity of the tea leaf was the amount of precipitation during the growing season (March–September), amounting to 650 mm. The harvesting of tea leaves in unfavorable years took place unevenly, often one of the months of the leaf-collecting period yielded about 50% of the total harvest. The combined use of zinc, boron, and magnesium for the studied period 2011–2023 was economically profitable, a significant increase in the yield of green tea leaves provided a level of profitability of 20%.

The effectiveness of technologies without autumn tillage

The article shows the yield of spring soft wheat in different technologies in the absence of autumn tillage. Technologies differ in the place of wheat in crop rotation and the use of fertilizers. Soil tillage in experiment No. 1 in a four-field grain-fallow crop rotation and on permanent wheat is zero. In experiment No. 2, stubble was left in autumn on long (24 yields) repeated wheat crops, where the soil loosens only when sown with a seeder SKP-2,1 with a cultivator-type coulter. With zero tillage with the removal of crops from fallow, the yield from 1,7 t/ha in the 1st field in the following crops decreased by 1,31-1,44 times, against the background of fertilizer in 1,08-1,12. Permanent sowing of wheat on stubble, compared with the yield of fallow, reduced grain harvest on backgrounds N0 and N40 by 1,60 and 1,42 times. Yield of 2,5 t/ha were obtained in the 1st field after fallow only in a favorable year, as in the following field. Due to fertilizer N40 in such a year, grain harvest increased in three crops of the crop rotation to 2,7-3,0-3,3 t/ha in up to 2,9 t/ha of permanent wheat. The formation of a high yield of wheat by fallow was facilitated by the preservation of the number of productive stems at an average level of 291 pieces per 1 m2, whereas on other backgrounds there were 274-265 and 243 with permanent cultivation. The number of grains in the ear was of great importance, which reached 18,1-20,2 pieces in fallow with 14-15 in other technologies.

Malting barley in the Northern Urals

The article presents the results of studying the yield and grain quality of malting barley varieties grown on different backgrounds of fertilizers. Barley grain is a valuable raw material for the cereal, brewing, and feed processing industries. In the Northern Trans-Urals, barley is the most important forage and food crop. The purpose of the research was to study the effect of increasing norms of mineral fertilizers on the yield and grain quality of malting barley varieties in the conditions of the northern forest-steppe of the Tyumen region. Studies were conducted in 2022 and 2023 with the varieties Acha, Despina, KVS Hobbs, Beatrice. The experiment options included: 1) control without fertilizers; 2) N30P30K30; 3) N60P60K60. The soil cover of the experimental field is leached chernozem, heavy loamy in granulometric composition. The chemical composition of the soil is characterized by an average humus content in the arable layer, an average supply of phosphorus, potassium, low nitrogen and a slightly acidic reaction of the soil solution. The conditions of the 2022 growing season were characterized by high air temperature and sufficient precipitation. Meteorological indicators in 2023 were characterized by excessively high air temperatures and uneven precipitation, which negatively affected the yield of barley varieties. In the conditions of 2022, the varieties showed responsiveness to fertilizers. The greatest increase in yield was obtained against an increased background (N60P60K60): in the Acha variety – 1.48 t/ha; in the Despina variety – 2.71 t /ha, in the KVS Hobbs variety – 2.12 t/ha, in the Beatrice variety - 1.60 t/ha. In 2023, reliable increases from the action of fertilizers were obtained in two varieties – Acha (+0.57 t/ha) and Beatrice (+0.67 t/ha) against an increased background of fertilizers. Barley varieties were characterized by high indicators of grain nature and germination ability. The protein content corresponded to the standards for brewing in the Despina and KVS Hobbs varieties in the version without fertilizers and in the N30P30K30 variant, in the Beatrice variety – in all variants, in the Acha variety – only in the version without fertilizers.

The Effect of Various Tillage Methods and Meliorants Application against their Background on the Dynamics of Macronutrients Accumulation in the Winter Wheat Plants and their Output via Crop Yield

The article presents the results of two-year investigations related to the effect of different soil cultivation methods, application times of equal doses of mineral and organic fertilizers and bio-humus with bentonite application against their background on the dynamics of macronutrients accumulation and their removal/ output through the crop yield. Considering the changes in the winter wheat growth, development, and yield capacity under the effect of different soil tillage methods, as well as the applied fertilizers and bentonite in rainfed conditions, and also the nutrition characteristics, to get high and sustainable yield the cultivation of winter wheat should be implemented only through loosening method, while fertilization should be implemented by introducing natural rock bentonite into the soil either on the background of mineral fertilizers (N60P60K60) or bio humus (3.5 t/հa) in autumn, as a result of which the soil air, nutrition and humidity regimes improve, favorable conditions are created for the regular growth and development of the plant and 48.8-52 c/ha grain and 89-96 c/ha straw yield is ensured.

FEATURES OF MAIZE GROWING FOR GRAIN IN THE WESTERN FOREST ZONE OF UKRAINE IN THE CONDITIONS OF CURRENT CLIMATE CHANGES

Modern climatic changes, namely significant warming in the northern Forest-Steppe and Polissia zones of Ukraine, provide opportunities for the cultivation of a number of grain and leguminous crops (maize for grain, soybeans, sunflower, and others), previously uncharacteristic of this region. Among the above-mentioned crops, corn has the greatest grain yield potential, therefore it is one of the most common crops in world agriculture. If 10-15 years ago corn was not grown for grain in the Polissia zone, then in recent years its sown areas have grown significantly, and the yield in some years is not inferior to the regions of the Forest Steppe and Steppe, which are traditional for this crop. The results of experimental studies of the station showed that under favorable conditions on the most fertile slopes of the drained sod-podzolic soils of the Western Polissia zone, with intensive technologies, it is possible to obtain more than 10-12 t/ha of corn grain.
 The analysis of hydrothermal indicators shows that with the current indicators of heat supply of the growing season in the zone of Western Polissia on mineral soils, it is possible to achieve not only early-ripening, but even medium-early hybrids of corn with FAO up to 280-300. Drained peat soils, due to their high nitrogen content and sufficient amount of moisture, have sufficient potential for obtaining a high yield of corn grain. However, its indicators over the years of research vary greatly and depend to a large extent on the agro-meteorological conditions of the growing season. It has been established that the main limiting factors for achieving a high yield of corn grain on peat soils are less favorable microclimatic features (less amount of active heat, shorter growing season and frost-free period, etc.) compared to adjacent sod-podzolic soils located nearby on dry land. It has been experimentally established that under conditions of minimum duration without a frost period, only the most early-ripening hybrids of corn with FAO up to 220-240 will have time to form a full-fledged crop of grain on drained peat soils in the Western Polissia zone. By choosing late-ripening hybrids, there is a risk of a significant shortfall in the harvest due to the premature termination of vegetation caused by early autumn frosts. It was established that the highest yield of corn per grain, both on sod-podzolic and peat soils, was provided by the organo-mineral fertilization system, which was based on the application of complete mineral fertilizer at the rate of N90Р90К90 on turf-podzolic soils and N35Р60K120 on peat soils in combination with phosphorus mobilizing drug Rice Pi. The use of the organo-mineral fertilization system (N90Р90К90 + phosphorus mobilizing drug Rice Pi) ensured an increase in the yield of corn on sod-podzolic soils by 30,2 ct/ha compared to the basic fertilization system (N30Р30К30). The use of the organo-mineral fertilization system (N35Р60K120 + phosphorus mobilizing drug Rice Pi) ensured an increase in the yield of corn on peatlands by 56.8 ct/ha compared to the natural background of fertility.