Soil Tillage Systems Research Articles

ПЕРСПЕКТИВЫ ИСПОЛЬЗОВАНИЯ МАСЛИЧНЫХ КУЛЬТУР В СЕВООБОРОТАХ ЛЕСОСТЕПНОЙ ЗОНЫ ПОВОЛЖЬЯ

An increase of biological diversity of field crops is relevant for modern agriculture. The aim of our study was comparative assessment of productivity of oilseeds (oil flax, white mustard and spring rape) and substantiation of primary soil tillage technology and plant protection during crop cultivation in the foreststeppe zone of the Volga region. The research results showed that the growing season of white mustard was 87-99 days, oil flax - 97-106 days and spring rape - 97-103 days. The period from harvesting to winter wheat sowing was 12-20 days for oil flax, white mustard - 20-30 days, for spring rape - 14-20 days, which makes it possible to use these crops as forecrops for winter grain crops. When cultivating oil flax, white mustard and spring rape, combined system of soil tillage in crop rotation is more effective, where, in comparison with the minimum tillage of the soil, the seed yield increased (by 8.4-23.7%), as well as vegetable fat (by 16.9- 30.5%). The adaptive integrated plant protection system (a combination of agrotechnical, biological and chemical plant protection methods) was more effective in comparison with herbicide usage. Evaluation of economic efficiency showed that cultivation of spring rape provides a higher level of income in comparison with other crops. Combined tillage and the protection level of standard agricultural technologies (only herbicide usage) ensured an increase of net operating profit per hectare, therefore, the substantiation of plant protection system should be carried out with egad to economic limits of harmfulness.

The Effect of Different Soil Tillage Systems and Crop Residues on the Composition of Weed Communities

The composition of weed communities in agricultural crops is dependent on soil properties and the applied agronomic practices. The current study determined the effect of different tillage systems and crop residue on the soil weed community composition. The research programme encompassed 2013–2015 in a long-term field experiment located in the Experimental Station of Vytautas Magnus University in Lithuania. The soil type in the experimental field was qualified as Endocalcaric Stagnosol (Aric, Drainic, Ruptic, Amphisiltic). Weeds were categorised into communities according to soil pH, nitrogen and moisture indicators. The results of investigations were grouped using cluster analysis. Agricultural crops were dominated by different weed species depending on the soil pH and moisture. Weed species were relatively more frequent indicating nitrogen-rich and very nitrogen-rich soils. In the reduced tillage and no-tillage systems, an increase in the abundance of weed species indicating moderate acidity and low acidity, moderately wet and wet, nitrogen-rich and very nitrogen-rich soils was observed. The application of plant residues decreased the weed species abundance. In the reduced tillage and no-tillage systems, the quantitative distribution of weed was often uneven. By evaluating the association of weed communities with groups of different tillage systems with or without plant residues, their control can be optimised.

ЕФЕКТИВНІСТЬ ОСНОВНОГО ОБРОБІТКУ ҐРУНТУ ТА МІНЕРАЛЬНОГО ЖИВЛЕННЯ У ВИРОЩУВАННІ СОЇ НА ЗРОШЕННІ

In the article the brought results over of experimental researches of influence of different methods and depth of soil basic tillage and doses of mineral fertilization on agrophysical properties and productivity of soybean. A purpose of researches is establishment of the most effective methods of soil basic tillage and doses of application of mineral fertilizers at growing of soybean in row croprotation on the irrigation of south of Ukraine and their influence on a height and development of plants, forming of harvest and quality of seed. During an experiment used the field, in-gravimetric, visual, laboratory, calculation-comparative, mathematically-statistical methods with the use of confessedly methods and methodical recommendations. For determination of efficiency of action of soil basic tillage and doses of fertilizers on the productivity of soybean five variants of methods of basic tillage were stopped up and three variants of fertilizer systems: organic and two organo-mineral with doses bringing of mineral fertilizers - N30P60, N60P60 on a background of post harvesting bits and pieces of cultures of crop rotation and optimal mode of irrigation. Results. The changes of agrophysical properties happened under act of the systems of soil basic tillage, nourishing mode, that stipulated creation of different terms for a height and development of culture and forming of harvest. The productivity of seed of soybean at plowing on a 25-27 cm averaged for five years on a background the dose of fertilizers of N60P60 of 4,22 t/ha. At the combined tillage which united disk loosening on a 14-16 cm with slotting on a depth a 38-40 cm, 4,12 t/ha of seed of soybean is got in the system of differentiated-1 soil tillage. On the average on a factor B (system of fertilizer), the productivity of seed of soybean at organic system of fertilize made 2,38 t/ha. Bringing of dose N30P60 assisted the height of harvest on 0,84 t/ha, and N60P60 on 1,39 t/ha, or on 35,2 and 58,4% accordingly. Conclusion. In the short row crop rotation on the irrigated lands of south of Ukraine the most favorable terms for a height, development and forming of harvest of soybean on dark-chestnut soils are created in the systems of plowing basic soil tillage with the turn of layer or differentiated- 1 tillage with the deep loosening under soybean or shallow on a background slotting on a depth a 38-40 cm under a previous culture.

Влияние приемов и систем основной обработки почвы на сбор семян, растительного масла и кормового белка сои и ярового рапса в первой ротации севооборота

We studied the influence of various methods and systems of the primary soil tillage on the yields of seeds, vegetable oil and protein of soybean and spring rapeseed at the All-Russian Rapeseed Research Institute (Lipetsk, Lipetsk region) in 2015–2018. In the field crop rotation (soybeans, winter wheat, spring rapeseed and barley), four systems of the primary soil tillage have been carried out, these are conventionally referred to as: moldboard-surface tillage, moldboardsurface tillage with deep loosening, moldboardsurface tillage with shallow loosening and minimal treatment (subsurface). The soil at the experimental field was leached, heavy clay loam chernozem. The weather conditions during the vegetative period varied according to the years of the research, which affected the seed yield and quality of soybean and spring rapeseed. We revealed the largest and relatively equal yields of seeds, vegetable oil and protein per a hectare of soybean and spring rapeseed was provided by moldboard-surface tillage (plowing under soybean and rapeseed, surface tillage for winter wheat and barley) and moldboard-surface tillage with deep loosening (deep subsurface loosening under soybean, plowing under spring rapeseed and surface tillage under winter wheat and barley), and the lowest yield was obtained using minimal soil treatment (chisel plowing under spring rapeseed and surface tillage under soybean and cereal crops). The quality of seed yield of oil crops in the studied experimental variants was practically equal. At the same time, in general, during the experimental period, the yield and the total yields of vegetable oil and protein of spring rapeseed were significantly higher than those of soybean.

The Influence of Soil Tillage System on Changes in Gas Exchange Parameters of Pisum sativum L.

A field experiment was carried out in 2017–2019 as a split-plot design with four replicates at the Agricultural Experimental Station in Grabów, Poland. The aim of the study was to compare the gas exchange parameters of the pea depending on the use of different soil tillage systems. Physiological plant parameters as: net photosynthetic rate (PN), transpiration rate (E), stomatal conductance (gs), intercellular CO2 concentration (Ci) and relative chlorophyll content were measured in three developmental stages. The study have showed that all the measured parameters were affected by the tillage system of the soil. Net photosynthetic rate and transpiration rate were significantly lower in the treatments, where simplified-tillage was applied. Pea grown in the plough tillage (CT) showed a generally higher rate of net photosynthesis and transpiration rate compared to that of peas grown in the reduced tillage and no-tillage systems, but this was dependent on the plant development stage and the weather conditions prevailing in a given year. The highest intercellular CO2 concentration (Ci) under different cultivation methods were found in the no-tillage system, regardless of the developmental stage of legumes. The values of determination coefficients showed a positive relationship between the photosynthetic rate and seed yield of the peas tested in all the years of the research. The study also showed that a significantly higher SPAD index was found in the CT tillage system, irrespectively on the developmental stage.

Improvement of the Water Management by Applying the No Tillage System for the Winter Wheat Production

The Transylvanian Plain has a particular aspect, as the hilly areas are predominant and here the soil erosion phenomena through levigation are frequently encountered. The effect of water availability on yields has been thoroughly researched, being one of the main limitative factors of the winter wheat yields. Starting from these considerations, during the agricultural years 2012-2018, a bi-factorial yield test was performed at Agricultural Research and Development Station (ARDS) Turda, for a period of seven years. The study explored the influence of the water status under the influence of two tillage systems and the climatic conditions specific for this area on winter wheat yields. In the field conditions of Turda during experimental interval, the soil tillage system had a rather small impact on the winter wheat yields. In the conventional system (CS) a reserve of accessible water is preserved better during the spring period, this being attributed to a better infiltration into the soil of winter precipitation (snow). In the conservative system (NT), the observed trend suggests that restoration of the ground water reserve is more difficult than in the CS but the loss of water in the CS is just as fast.

COVER CROPS AND SOIL-BORNE FUNGI DANGEROUS TOWARDS THE CULTIVATION OF Daucus carota L.

The principles of good agricultural and horticultural practice, which considers both environmental protection and high yielding of plants, require modern methods of cultivation. Cover crops are used in the cultivation of various plants, including root vegetables such as carrot. The purpose of field and laboratory studies was to determine the effect of selected cover crops on the healthiness of carrot (Daucus carota L.). The field experiment took into consideration cover crops such as spring rye, white mustard, buckwheat, fodder sunflower and two systems of soil tillage, i.e.: tillage before winter (ploughing) + spring tillage (a combined cultivator) and only spring tillage (a combined cultivator). In each experimental treatment, the number and healthiness of carrot seedlings were determined. A laboratory mycological analysis made it possible to determine the qualitative and quantitative composition of fungi infecting the underground parts of carrot. Good emergencies and the healthiness of carrot plants were observed in the objects with rye and white mustard as cover crops. The cultivation system had no significant effect on the proportion of diseased seedlings of carrot. Rye and white mustard were more effective than buckwheat and sunflower in limiting the occurrence of fungi pathogenic towards carrot. Diseased seedlings and roots after harvest of carrot were most frequently colonized by Altenaria alternata, A. chartarum, A. dauci, A. radicina, Sclerotinia sclerotiorum, Rhizoctonia solani and Fusarium spp.

The Most Important Fungal Diseases of Cereals—Problems and Possible Solutions

The level of cereal yields and the quality of these yields depend, to a large extent, on a crop management system, the genetic potential of a given cultivar, but also on factors that may cause damage to plants or a reduction in yield. Such factors include fungal diseases of cereals, which may cause a reduction in yield by 15–20%, and in extreme cases even by 60%. The main factors determining the occurrence of these pathogens are the weather conditions during the growing season of plants, crop rotation, the previous crop, the soil tillage system, and nitrogen fertilisation. Fungal diseases of cereals limit plant growth and development, as well as reduce grain yield and quality. This paper reviews the literature on fungal diseases of cereals.

Quality of drained waters of the irrigated rice frames during the establishment of pre-germinated cultivation system

Irrigated rice (Oriza sativa L.) pre-germinated production systems occupy approximately 100 thousand ha, annually cultivated in Rio Grande do Sul State, mainly in poorly drained areas, and with infestation of competing plants, especially red rice (Oriza sativa L.). This system constitutes the main technologic resource for rice crops produced on an ecological basis, by means of soil tillage and water management. Despite this, water outlets, specifically after seeding, have outstanding agronomic and environmental implications. Loss of nutrients and the physical and chemical quality of drained water have been questioned by public research and environmental institutions. This work evaluated the effects of different soil tillage systems and retention time of water in irrigated rice frames. The experiment was conducted in Viamão town, Rio Grande do Sul State. Two different soil tillage systems and four different times of frame drainage after seeding were investigated. Results showed that the main limiting attributes of water quality were turbidity, biochemical oxygen demand (BOD) and phosphorus (P) content, reaching 1800 TNU, 115 mg L-1, and 1.6 mg L-1, respectively. These attributes showed values higher than established environmental thresholds. Water quality was inappropriate to discharge directly into water courses, regardless of treatments.An alternative is the immediate placement in rice production areas, in more advanced development stages of plants. Pre-germinated rice crops require a system framework to avoid nutrient loss and consequent reduction of soil fertility.

Influence of tillage systems on soil physical properties, spectral response and yield of the bean crop

Soil tillage systems alter soil physical attributes and may affect crop growth and yield. In this sense, the objective of this study was to assess the short-term impacts of tillage systems on soil physical properties, spectral response, and yield of the bean crop. The field experiment was laid out in a randomized block design with three tillage systems (NT: No-tillage; MT: Minimum tillage; and CT: Conventional tillage) and six replicates. Data collected included soil physical properties (SPR: Soil penetration resistance, SBD: bulk density, and SWC: water content), crop's spectral response (NDVI: Normalized difference vegetation index) through different multispectral sensors, and lastly, grain yield. Results showed that SBD and SPR values were significantly higher in the NT system at 9 days after planting. Moreover, the SPR in the NT system remained significantly higher (p < 0.05) in the 0–10 cm and 20–30 cm depth for all field measurements. Despite that, the highest SPR value (1.76 MPa) was lower than the threshold (2 MPa) that could affect crop growth and yield. Regarding the NDVI, there was no significant influence of tillage systems. Nonetheless, all devices detected the temporal variability of the NDVI throughout the crop growth. Furthermore, grain yield was also not influenced by treatments and reached values of 3543.61, 3605.05, and 3980.90 kg ha−1, respectively for the NT, MT, and CT systems. Finally, our results suggest that at least in the short-term, the NT system could be a feasible alternative to reduce soil mobilization and its negative impacts without compromising the crop yield.

Efficiency of basic tillage systems in the cultivation of barley

The effectiveness of long-term use of various basic tillage systems of dark grey forest soil in the conditions of the Northern Trans-Urals was established. Their impact on the efficiency of barley cultivation depending on the grain (spring wheat) or legume forecrop (vetch for grain) was determined. The research was carried out in a stationary experiment covering moldboard, nonmoldboard, combined, differentiated, stubble-mulch and surface systems of basic soil tillage. The experiments took place during the third–sixth rotations (1996–2018) of two grain-fallow crop rotations spread in time and space. The first crop rotation was: bare fallow – winter rye – spring wheat – spring vetch – spring barley, the second crop rotation: bare fallow – winter rye – spring wheat – spring wheat – spring barley. When cultivating barley following the legume forecrop (spring vetch), it was economically feasible to use basic tillage systems with the elements of minimization. It included non-moldboard and combined tillage with subsurface loosening by a plow with SibIME tines to a depth of 20-22 cm differentiated with stubble-mulch at 12-14 cm and disk harrowing at 10- 12 cm. These methods provided conditions for the formation of productivity close to the moldboard system and practically the same yield of barley, net income and energy efficiency coefficient. Without fertilizers, the yield was 2.97-3.03 t/ha, with the use of N40P40P40 it was 3.47-3.65 t/ha. When planting barley following wheat sown twice, the most effective was moldboard tillage system with a net income of 14.67 thousand rubles/ha without fertilizers and 22.75 thousand rubles/ha with fertilizers and energy coefficient of 2.65 and 2.75. The use of resource-saving tillage methods with repeated wheat led to a decrease in the yield of barley grain by 0.09–0.40 t/ha, and a decrease in the net income of barley cultivation compared to the legume forecrop by 31.0–44.1%.

Water retention in Cambisols under land uses in semiarid region of the Brazil

Knowledge about the physical and hydric characterization in the soil is essential for studies on land use and plant development. Thus, this study evaluated water retention and its interrelationships with the physical and chemical attributes of Cambisols under different land uses in a rural settlement in a semiarid region of Brazil. The analysis of soil water retention curves associated with multivariate statistics was performed to distinguish agroecosystems. The environments studied were Preserved Forest - reference area, Cajarana Orchard Area, Corn/Bean Consortium, Watermelon/Pumpkin Consortium, and Agroecological Cultivation. It was obtained as a result that Preserved Forest presented the highest field capacity, permanent wilting point, and available water. However, there was greater water retention in Cajarana Orchard Area compared to other environments. The reference area and Agroecological Cultivation maintained conditions that improve the soil structure, weighted mean diameter, microporosity, and total porosity. In Watermelon/Pumpkin Consortium and Agroecological Cultivation, there was a greater contribution of the organic total carbon contents and in Cajarana Orchard Area, and Watermelon/Pumpkin Consortium had discriminating variables the clay, hydrogenionic potential in water, and macroporosity. Thus, the multivariate analysis allowed to analyze changes in water retention, which differed not only between land use but also in-depth and inorganic soil fractions. In addition, it was concluded that the soil tillage systems alter the chemical, physical and structural attributes of Cambisols of the semiarid studied and that the minimum tillage is an alternative to be adopted as the most suitable for the region.

The Effects of Management (Tillage, Fertilization, Plant Density) on Soybean Yield and Quality in a Three-Year Experiment under Transylvanian Plain Climate Conditions

The regional agroecological conditions, specific to the Transylvanian Plain, are favorable to soybean crops, but microclimate changes related to global warming have imposed the need for agrotechnical adaptive measures in order to maintain the level of soybean yield. In this study, we consider the effect of two soil tillage systems, the seeding rate, as well as the fertilizer dosage and time of application on the yield and quality of soybean crops. A multifactorial experiment was carried out through the A × B × C × D − R: 3 × 2 × 3 × 3 − 2 formula, where A represents the year (a1, 2017; a2, 2018; and a3, 2019); B represents the soil tillage system (b1, conventional tillage with mouldboard plough; b2, reduced tillage with chisel cultivator); C represents the fertilizer variants (c1, unfertilized; c2, one single rate of fertilization: 40 kg ha−1 of nitrogen + 40 kg ha−1 of phosphorus; and c3, two rates of fertilization: 40 kg ha−1 of nitrogen + 40 kg ha−1 of phosphorus (at sowing) + 46 kg ha−1 of nitrogen at V3 stage); D represents the seeding rate (1 = 45 germinating grains (gg) m−2; d2 = 55 gg m−2; and d3 = 65 gg m−2); and R represents the replicates (r1 = the first and r2 = the second). Tillage had no effect, the climate specific of the years and fertilization affected the yield and the quality parameters. Regarding the soybean yield, it reacted favorably to a higher seeding rate (55–65 gg m−2) and two rates of fertilization. The qualitative characteristics of soybeans are affected by the fertilization rates applied to the crop, which influence the protein and fiber content in the soybean grains. Higher values of protein content were recorded with a reduced tillage system, i.e., 38.90 g kg−1 DM in the variant with one single rate of fertilization at a seeding rate of 45 gg per m−2 and 38.72 g kg−1 DM in the variant with two fertilizations at a seeding rate of 65 gg m−2.

Water use efficiency, grain yield, and economic benefits of common beans (Phaseolus vulgaris L.) under four soil tillage systems in Mukono District, Uganda

With the increasing climate change impacts and variabilities, water is becoming a limiting factor for rainfed crop production in Uganda. Conservation tillage practices could improve soil and water conservation in croplands. Field experiments were conducted for three consecutive seasons from April 2019 to June 2020. The experiments evaluated the effect of soil tillage treatments on soil water storage, water use efficiency, grain yield, and economic benefits of the common beans (Phaseolus vulgaris L.) in two sub-counties of Mukono District, central Uganda. The soil tillage treatments were: no-tillage, stubble-mulching, deep tillage, and conventional tillage. The no-tillage and stubble-mulching improved soil water storage by 46 and 45%, respectively, compared with the conventional tillage in the 0–100 cm soil depth over the 14 months. Soil tillage treatments significantly (p < 0.05) affected the water use efficiency, with water use efficiency values generally higher under no-tillage and stubble-mulching than under deep tillage and conventional tillage treatments. The grain yield was highest under no-tillage and stubble-mulching than deep tillage and conventional tillage treatments, with over 5, 38, and 43% higher grain yield under no-tillage than under stubble-mulching, deep tillage, and conventional tillage treatments, respectively. Although no-tillage and stubble-mulching improved soil water storage and grain yield, seasonal precipitation distribution had a greater influence on the final grain yield, soil water storage, and water use efficiency. The net profit was 3 and 5 times higher under no-tillage than under conventional tillage and deep tillage treatments, respectively. The overall results showed that no-tillage and stubble-mulching were the optimum tillage treatments for increasing soil water storage and common bean yield, enhancing water use efficiency, and improving economic returns in central Uganda.

Contribution of tillage systems and crop succession to soil structuring

The use of conservational systems of soil cultivation has gained importance due to the need for soil preservation and carbon sequestration from the atmosphere. With the objective of evaluating soil structuring, this study determined the physical attributes and organic carbon contents of a clayey Oxisol in an area of 10 years under four different land uses: i.e., afforestation (AF), no-tillage system with grass-grass succession (corn/corn), no-tillage systems with grass-legume succession (corn/Crotalaria juncea L.) and conventional soil tillage system (corn/fallow). The evaluated areas are located in the Cerrado biome of southeastern Brazil. Each area was sampled at 20 points and undisturbed and disturbed samples were collected in the layers of 0.00−0.10 m, 0.10−0.20 m and 0.20−0.30 m. The attributes evaluated were related to soil aggregation and porosity and, due to the structure of dependence of the variables, the data were subjected to multivariate factor analysis. We observed that, after a long period, the no-tillage system promoted soil aggregation and porosity similar to those of the planted forest and superior to those of the conventional tillage system. The type of crop succession in the no-tillage system caused differences in soil structure, and grass-grass succession (corn/corn) promoted better soil structure compared to grass-legume succession (corn/Crotalaria juncea L.). The greater soil porosity generated by the conventional tillage system was limited to the most superficial layer (0.00−0.10 m) and this effect can be considered ephemeral, due to the presence of a large amount of smaller aggregates that, after the operation, can occupy the generated pores.

Corn Nitrogen Status Diagnosis with an Innovative Multi-Parameter Crop Circle Phenom Sensing System

Accurate and non-destructive in-season crop nitrogen (N) status diagnosis is important for the success of precision N management (PNM). Several active canopy sensors (ACS) with two or three spectral wavebands have been used for this purpose. The Crop Circle Phenom sensor is a new integrated multi-parameter proximal ACS system for in-field plant phenomics with the capability to measure reflectance, structural, and climatic attributes. The objective of this study was to evaluate this multi-parameter Crop Circle Phenom sensing system for in-season diagnosis of corn (Zea mays L.) N status across different soil drainage and tillage systems under variable N supply conditions. The four plant metrics used to approximate in-season N status consist of aboveground biomass (AGB), plant N concentration (PNC), plant N uptake (PNU), and N nutrition index (NNI). A field experiment was conducted in Wells, Minnesota during the 2018 and the 2019 growing seasons with a split-split plot design replicated four times with soil drainage (drained and undrained) as main block, tillage (conventional, no-till, and strip-till) as split plot, and pre-plant N (PPN) rate (0 to 225 in 45 kg ha−1 increment) as the split-split plot. Crop Circle Phenom measurements alongside destructive whole plant samples were collected at V8 +/−1 growth stage. Proximal sensor metrics were used to construct regression models to estimate N status indicators using simple regression (SR) and eXtreme Gradient Boosting (XGB) models. The sensor derived indices tested included normalized difference vegetation index (NDVI), normalized difference red edge (NDRE), estimated canopy chlorophyll content (eCCC), estimated leaf area index (eLAI), ratio vegetation index (RVI), canopy chlorophyll content index (CCCI), fractional photosynthetically active radiation (fPAR), and canopy and air temperature difference (ΔTemp). Management practices such as drainage, tillage, and PPN rate were also included to determine the potential improvement in corn N status diagnosis. Three of the four replicated drained and undrained blocks were randomly selected as training data, and the remaining drained and undrained blocks were used as testing data. The results indicated that SR modeling using NDVI would be sufficient for estimating AGB compared to more complex machine learning methods. Conversely, PNC, PNU, and NNI all benefitted from XGB modeling based on multiple inputs. Among different approaches of XGB modeling, combining management information and Crop Circle Phenom measurements together increased model performance for predicting each of the four plant N metrics compared with solely using sensing data. The PPN rate was the most important management metric for all models compared to drainage and tillage information. Combining Crop Circle Phenom sensor parameters and management information is a promising strategy for in-season diagnosis of corn N status. More studies are needed to further evaluate this new integrated sensing system under diverse on-farm conditions and to test other machine learning models.

"OPTIMIZATION OF CONVENTIONAL AGRICULTURE (TILLAGE X FERTILIZATION X PLANT PROTECTION) FOR SOYBEAN IN THE TRANSYLVANIAN PLAIN"

"The purpose of this study was to improve conventional agricultural technologies in soybean crop to ensure a higher yield and reduced environmental impact under climate conditions specific for the Transylvanian Plain. For the experimental design a three-factorial experiment was set up (tillage x fertilization x plant protection products). Factor interaction was evaluated using formula AxBxC-R:4x4x4-3 to highlight the benefits of the practices. This study examined yield crops and size of the soybean plants in an effort to identify best practices. Yield was highly increased in conventional soil tillage system (3420 kg/ha), whereas for the minimum soil tillage system and for direct sowing there were no significant difference 2755-2995 kg/ha and 2605 kg/ha, respectively. Crop performance in terms of yield was highly influenced by the soil tillage system (57.5%), followed by plant protection treatments (22.9%) and fertilization (11.8%). Fertilization with N40P40 + gulle + green fertilizer ensured the highest soybean production (3132 kg/ha). Plant protection treatments during vegetation determined significant yield increases, with high influence of insecticides and a cummulative effect when both fungicides and insecticides were used (3193 kg/ha). Highest size of plants was registered in conventional soil tillage system. Overall crop protection treatments during vegetation (insecticide + fungicide) triggered not significant increases in plant size, except Teo TD soybean cultivar."

Сorn productivity under different systems of basic soil tillage and fertilization under irrigated conditions of southern Ukraine

Сorn productivity under different systems of basic soil tillage and fertilization under irrigated conditions of southern Ukraine

Dynamics of wheat root colonization by arbuscular mycorrhizal fungi under contrasting soil tillage systems and its impact on grain yield

In this work, we investigated the effect of the soil tillage farming system on the variability of arbuscular mycorrhizal fungi (AMF) root colonization of a local durum wheat variety, conducted during five years of experimental trial in a semi-arid region of eastern Algeria. No tillage farming system improved the AMF symbiotic activity from the fourth year of testing with the appearance of high root percentage of arbuscules at tillering and grain filling stage. Compared to that, the conventional tillage was marked by the observation of a high root percentage of vesicles especially at grain filling. Despite inter-annual fluctuations, the no tillage farming system improved the average yield of the five trial years by 20%. Multiple regressions analyses using the stepwise selection method were made to formulate an equation linking grain yield and the AMF symbiotic components specific to each tillage farming system.

INFLUENCE OF SOIL TILLAGE SYSTEM, FERTILIZER AND TREATMENT APPLIED TO SEEDS ON SOYBEAN CHEMICAL COMPOSITION

"In order to evaluate the effect of soil tillage system, fertilization and also different treatments applied to seeds on chemical composition in soybean crop, a field experiment was conducted at Research and Development Station for Agriculture Turda in 2020. Teo TD, an early soybean variety developed at RDSA Turda and registered in 2017 was used as a biological material. The compared tillage systems were: conventional tillage (plowing), reduced tillage (chisel or disk) and also no-tillage system. Four different mineral and organic fertilizers (N40P40, N40P40 + gulle, N40P40 + green fertilizer, N40P40 + gulle + green fertilizer) and various treatments applied to seeds (fungicide, insecticide, fungicide + insecticide, untreated) were also studied. All data were subjected to ANOVA using Polifact. Chemical composition (protein content, oil content, stearic acid (18:0), oleic acid (18:1), linoleic acid (18:2), and linolenic acid (18:3)) of Teo TD seeds was analyzed using NIR spectroscopy. Significant differences between some tillage systems and fertilizers were recorded in protein content, fat content and also stearic, oleic and linolenic acids content. The treatments applied to seeds influenced very significant the stearic acid and oleic acid, distinct significant the linoleic acid and significant the protein content."