Row Length Research Articles

Impact of crop bio-intensification and nutrient management on growth, yield and yield attributes of rice crop under North West Himalayan region of Jammu-Kashmir

The experiment was performed in rabi, zaid and kharif seasons of 2018-19 and 2019-20 to study the bio-intensification possibilities in different cropping systems at Research Farm, Main Campus, Chatha, SKUAST-Jammu, Jammu & Kashmir, India .The experiment was laid out in randomized block design (factorial)/ DMRT with 15 treatments and three replications. Among the crop bio-intensification, rice crop sown under wheat (FIRB)+lentil (B)-summer moongbean -BM+rice (F)+moongbean (B) practice produced significantly higher panicle per meter row length, tillers per meter row length than the crop sown under wheat - rice during both the years of experimentations. Whereas, rice crop sown under wheat-rice practice produced significantly higher grain yield (35.42 q/ha and 36.65 q/ha), than the other existing crop bio-intensification practice during both the years of experimentation. Among the nutrient management, application of 100% in- organic showed significantly higher panicle per meter row length, tillers per meter row length and yield than 100% organic (FYM) and statistically at par with INM (50:50) during both the years of experimentations.

Growth, Phenology and Yield Attributes of A White Maize Genotype Sauwmopmdt273 Under Different Planting Configurations

A field experiment was carried out at the agronomy field of Sher-e-Bangla Agricultural University, during the period from July to October, 2018 with fifteen planting configurations viz., T1 (40 cm × 15 cm), T2 (40 cm × 20 cm), T3 (40 cm × 25 cm), T4 (45 cm × 15 cm), T5 (45 cm × 20 cm), T6 (45 cm × 25 cm), T7 (50 cm × 15 cm), T8 (50 cm × 20 cm), T9 (50 cm × 25 cm), T10 (55 cm × 15 cm), T11 (55 cm × 20 cm), T12 (55 cm × 25 cm), T13 (60 cm × 15 cm), T14 (60 cm × 20 cm), and T15 (60 cm × 25 cm) to study the growth, phenology, yield attributes and yield of a white maize genotype SAUWMOPMDT273. The experiment was laid out in a randomized complete block design with three replications. Regarding growth and yield parameters, the treatment 60 cm × 25 cm showed significantly the maximum plant height, tassel length and leaf area at silking, grain filling and at harvest. The highest area of an individual leaf 477.9, 879.3, and 496.3 cm2 as well as stem dry matter weight of 28.73, 21.35, and 27.40 g plant-1 respectively, below cob-node, at cob-node and above the cob-node during silking obtained from treatment 60 cm × 25 cm. The treatment 55 cm × 25 cm showed maximum biological yield (14.64 t ha−1) and 60 cm × 20 cm showed significantly the highest cob length (15.94 cm) and number of grains row−1 (20.00), but the highest number of grains cob−1 (231.50), 100 seed weight (29.99 g), grain weight cob−1 (59.81 g) were recorded from 55 cm × 25 cm. Sparser configuration (60×20 cm) requiring less seed rate, this configuration may be followed. Bangladesh Agron. J. 2024, 26(2): 67-76

Biometric analysis of the cranial features of common voles

Although cranial bones reliably identify the features of mammals, these traits can be affected by sex, population size and seasonality. This paper biometrically analyses the cranial features of the common vole. The research sample consisted of adult (n = 134), subadult (n = 57), of western Slovakia. Overall, software based on the highlighted marks measured 29 cranial features. Significant sexual dimorphism was observed for three features in adult individuals (width of the maxillary tooth row – right side “WMTRR”, maximum height of the mandibula excluding coronoid process “AMdm” and coronoid height of the mandibula “AMd”) and four features in subadults (length of the tooth row in the maxilla “LOSD”, “WMTRR”, length of the molar “LoM” and alveolar length of the lower molars “ALLM”). Results showed a significant positive relationship between body weight and cranial size in 18 of the 29 features. They also suggested a weak but significant positive effect of common vole abundance on cranium size (Chitty effect) likewise in 6 of the 29 features. In several cases, this effect affects, in addition to the abundance, the onset of sexual maturity of individuals.

Effect of Seed Rate and Nitrogen on Growth and Yield Attributes of Wheat (Triticum aestivum L.)

The field experiment entitled Effect of Seed Rate and Nitrogen on Growth and Yield Attributes of Wheat (Triticum aestivum L.) was conducted, in the experiment comprising a total 12 treatment combinations; such as three seed rates (100, 125 and 150 kg/ha) and four levels of nitrogen (75, 100, 125 and 150 kg/ha). Which was carried out in split plot design with three replications. Results revealed that the growth, yield and economics of wheat significantly differed with different seed rates and nitrogen levels. Results showed that crop sown using seed rate of 100 kg/ha recorded significantly higher plant height, spike length, number of grains per spike and test weight as compared to 125 and 150 kg/ha seed rates. Higher dry matter accumulation, number of tillers per meter row length and straw yield recorded with seed rate of 150 kg/ha over 100 and 125 kg/ha. However, significantly higher grain yield and biological yield, net returns and B: C ratio were recorded with the seed rate of 125 kg/ha as compared to seed rate of 150 and 100 kg/ha. Among nitrogen levels, significantly higher plant height, dry matter accumulation, number of tillers per meter row length, spike length, number of grains per spike and test weight, grain yield, straw yield and biological yield, net returns and B: C ratio recorded with the application of nitrogen @ 125 kg/ha as compared to application of nitrogen @ 75 and 100 kg/ha, but it was at par with the application of nitrogen @ 150 kg/ha as compared to 125 and 150 kg/ha seed rates.

Effect of cutting schedules and nitrogen management on forage and seed production of oats (Avena sativa L.)

A field research entitled “Effect of cutting schedules and nitrogen management on forage and seed production of oats (Avena sativa L.)” was conducted to find out the effect of cutting schedules (uncut, cut at 50 DAS and cut at 60 DAS) and nitrogen management (120 kg N ha-1, 90 kg N ha-1 + one spray of nano urea 2 ml litre-1, 90 kg N ha-1 + one spray of nano urea 4 ml litre-1, 60 kg N ha-1 + two sprays of nano urea 2 ml litre-1 and 60 kg N ha-1 + two sprays of nano urea 4 ml litre-1) on productivity of oats and find out the effect of foliar application of ‘Nano Urea’. The results revealed that significantly higher plant height, number of tiller 0.5 m-1 row length and dry matter accumulation 0.5 m-1 row length were observed under uncut over cut at 50 DAS and cut at 60 DAS.The results revealed that cut at 60 DAS resulted in significantly highergreen fodder yield as compared to cut at 50 DAS. Yield parameters viz. number of effective tillers 0.5 m-1 row length, panicle length, number of grains panicle-1, 1000 grain weight, weight of grain 0.5 m-1 row length, grain, straw, biological yield and harvest index of oat was significantly higher under uncut as compared to cut at 50 DAS and 60 DAS. Grain yield increased under uncut over cut at 60 DAS by 146.8 per cent and straw yield increased under uncut over cut at 50 DAS and cut at 60 DAS by 69.1 and 182.7 per cent, respectively. Further, uncut recorded significantly higher nitrogen, phosphorus and potassium content and uptake in grain and straw as compared to cut at 50 DAS and 60 DAS. Further, number of tiller and dry matter accumulation increased with the application of 120 kg ha-1. Significantly higher green (35.02 t ha-1) and dry (7.35 t ha-1) fodder yield was obtained with the application of 120 kg N ha-1 as compared to application of 60 kg N ha-1 + two sprays of nano urea 2 ml litre-1 and 60 kg N ha-1 + two sprays of nano urea 4 ml litre-1, however, it was at par with application of 90 kg N ha-1 + one spray of nano urea 2 ml litre-1 and 90 kg N ha-1 + one spray of nano urea 4 ml litre-1. Yield parameters viz. number of effective tillers and 1000 grain weight increased with the application of 120 kg N ha-1. Further, grain yield increased with the application 120 kg N ha-1over 90 kg N ha-1 + one spray of nano urea 2 ml litre-1, 90 kg N ha-1 + one spray of nano urea 4 ml litre-1, 60 kg N ha-1 + two sprays of nano urea 2 ml litre-1 and 60 kg N ha-1 + two sprays of nano urea 4 ml litre-1 by 17.4, 14.2, 35.1 and 28.2 per cent, respectively. Straw yield increased with the application of 120 kg N ha-1 over 60 kg N ha-1 + two sprays of nano urea 2 ml litre-1 by 15.3 per cent. Further application of 120 kg N ha-1 recorded higher phosphorus and potassium content over rest of the treatments.

Bio-Efficacy of Different Insecticides Against Soybean Leaf Folder, Omiodes indicata (Fabricius, 1775) (Lepidoptera: Crambidae)

A study was conducted at the Agricultural Research Station (UAS, Dharwad), Sankeshwar, Karnataka during Kharif 2022-23 to assess the effectiveness of different insecticides against soybean leaf folder, Omiodes indicata. Among five treatments, lambda cyhalothrin 4.6 % + chlorantraniliprole 9.3 % ZC @ 0.4 ml l-1 exhibited the lowest mean population of soybean leaf folder, Omiodes indicata on 5th and 10th day after spray with 2.12 and 0.98 larval population per meter row length, respectively which was followed by emamectin benzoate 5 % SG @ 0.3 g l-1 (3.03 and 1.83 larvae per meter row length). Lambda cyhalothrin 4.6 % + chlorantraniliprole 9.3 % ZC was found to be the best effective treatment with 81.97 % reduction over control followed by emamectin benzoate 5 SG (71.61 %). Similar results were obtained with per cent defoliation.

Yield and yield components of some advanced Camelina (Camelina sativa L. CRANTZ) genotypes in Bolu ecological conditions

The negative effects of global warming are increasing worldwide and this increase is expected to continue. The camelina plant, which can be grown in marginal areas, stands out among other oilseed plants because it is drought-resistant and less costly. In the research, seeds belonging to 8 camelina genotypes, which were prominent in terms of oil rate, seed and oil yield, were used in the trial established in Bolu province, out of a total of 52 genotypes obtained from the seed bank of the United States Department of Agriculture, Agricultural Research Service and Germany. The study was conducted according to the Randomized Complete Block Design in Bolu Abant İzzet Baysal University, Faculty of Agriculture, Research and Application Field in the 2021-2022 production season. In the trait, each plot consisted of six rows with a row length of 3 m, a row spacing of 20 cm, and in row of 5 cm, with three replications. According to the research results; plant height 66.33-71.00 cm, number of branches 3.17-5.07 number plant-1, 1000 seed weight 1.10-1.24 g, seed yield 1095.4-1436.6 kg ha-1, oil content 36.63-40.37%, protein content 23.65-27.22%, oil yield 408.3-559.8 kg ha-1 and protein yield 279.0-391.3 kg ha-1. It was found that values between. According to the results obtained from the study, the K52 genotype in terms of seed yield, the K11 genotype in terms of oil rate and the K52 genotype in terms of protein rate came to the fore.

A Regional 100 m Soil Grid-Based Geographic Decision Support System to Support the Planning of New Sustainable Vineyards

A WebGis tool called GoProsit has been developed to support winegrowers in planning a new sustainable vineyard and in the identification of high-quality terroir in Tuscany, Central Italy, by providing various information on soils, climate, hydrological risks, and fertilization. GoProsit, hosted by the web platform GEAPP, is a free, user-friendly, and interactive Geographic Decision Support System (GDSS). Soil data behind the WebGis tool has a 1 ha resolution, achieved by processing the legacy vector-type soil database of the Tuscany Region with the DSMART (Disaggregation and Harmonization of Soil Map Units Through Resampled Classification Trees as supervised classification) algorithm, which disaggregated the map to 297,023 vineyard grid cells. Each grid cell holds climatic and pedologic information, along with physical and chemical features for each horizon of the most probable soil. GoProsit also provides soil maps in image format obtained by georeferencing about 50 historical soil maps (1969–2012). Finally, GoProsit runs and returns the outputs of six models: (a) carbon footprint, (b) potential erosion and maximum vine row length compatible with tolerable erosion, (c) potential water stress, (d) risk of runoff/waterlogging, (e) identification of suitable rootstocks, and (f) nutritional needs before planting. Statistics of the main model results for the investigated area are reported. This promising tool will soon be usable for the whole Italian territory; however, its potential makes it suitable for use in any wine-growing district.

Effect of Hairamin and Fertilizer Application on Grain Yield and Its Attributes in Wheat (Triticum aestivum L.) Varieties

A field experiment was conducted at the Research farm of the Department of Agriculture, Maharishi Markandeshwar University, Mullana, Ambala during Rabi season of 2021. Response of three wheat varieties to integrated nutrient management involving Hairamin (protein hydrolysate from human hair) and inorganic fertilizers (NPK) for grain yield and its attributes was studied in a field experiment. The soil was sandy loam, well-drained, alkaline (pH 7.23), low in nitrogen, medium in phosphorus, and high in potassium, with an electrical conductivity of 0.89 d/Sm. Eight treatments comprising a control and seven combination application of Hairamin, Azotobecter and recommended dose of inorganic fertilizers were evaluated in three wheat varieties “DBW 222", "HD 2967" and "PBW 723” in a randomized block design (RBD) with three replications. The T7 treatment, 75% recommended N, P, K dose throughout synthetic fertilizers and appropriate dose of Hairamin foliar spray, exhibited highest grain yield, biological yield and harvest index. This treatment was shown to be statistically comparable to T6 (50% recommended N, P, K dose throughout synthetic fertilizers and appropriate dose of Hairamin Foliar spray). This increase in yield was reflected in higher expression of yield attribute in traits namely (ears per running meter row length, spikelets ear-1, grains ear-1, 1000 grain weight, grain yield, straw yield, biological yield and harvest index). Therefore, use of Hairamin as bio-stimulant with reduced fertilizer doses is recommended for sustainable wheat production.

Morphometric analysis of the skulls of a ram and ewe Romanov sheep (Ovis aries) with 3D modelling.

With the development of technology, 2D images have left their place for 3D models. The 3D modelling technique is widely used in plastic surgery, orthopaedic surgery, neurosurgery, traumatology, dentistry and medical education. The skull is important in terms of containing the starting parts of systems with vital functions. The aim of the study is to reveal the difference between male and female and other species by 3D (three-dimensional) modelling and craniometric measurements of Romanov heads. In our study, skulls of Romanov sheep (10 females and 10 males) older than 1-year-old were used. The heads of Romanov sheep were scanned with computed tomography and modelled in 3D. In the study, it was determined that there was a statistically significant difference between male and female sheep in terms of the largest nose length, facial width, molar row length, viscerocranium length, and foramen magnum height parameters (p < 0.05). It was determined that the greatest width of the foramen magnum measurement parameter and the skull index showed statistically significant differences between the genders at the p < 0.01 level. No statistically significant difference was found in other measurements (p > 0.05). The data obtained as a result of the study will help in the racial discrimination and classification of bones obtained from zoo archaeological excavations.

Selection of Sweet Corn Inbred Lines by Agronomic Performance to Determining Hybrid Parents

The development of hybrid sweet corn varieties involves the selection of parental lines with specific traits to ensure good yield potential. The selection of inbred lines of sweet corn is a critical aspect of breeding programs aimed at developing improved varieties. This research will provide useful information of sweet corn inbreed lines have the potential to be developed as parent lines in the development of hybrid varieties. The study utilized 24 inbred lines (G1-G24) of sweet corn and employed a Randomized Complete Block Design (RCBD). Data analysis involved the use of analysis of variance with a 5% significance level, path and dendrogram analysis. Based on the analysis of 24 inbreed line of sweet corn, the potential for selecting parents based on quantitative traits influencing the outcome is evident in inbreed line G18, G12, G4, G23, and G20. Identification of these potential parents is essential for the genetic improvement of the population. The correlation heatmap data indicates a 41% correlation between the number of rows and cob stag length, and correlation between number of rows and ear diameter by 48%. The path diagram indicates that fresh weight, a crucial measure of crop yield, is strongly influenced by several agronomic traits, including plant height, ear length, ear diameter, dry weight, number of plants, row length, brix, and ear stalk. G24 can indeed be used as one of the parents with other group in hybrid breeding programs.

Effect of foliar supplementation of water soluble fertilizer on growth, yield and economics of wheat crop (Triticum aestivum L.)

A field experiment was conducted during rabi season of 2015-16 at Agronomy Research Farm of Chaudhary Charan Singh Haryana Agricultural University, Hisar, Haryana, to evaluate the effects of foliar application of water soluble fertilizers on growth, yield attributes and yield of wheat. The soil of the experimental plot was sandy loam in texture, low in available nitrogen (131.3 kg ha-1), medium in available phosphorus (17.2 kg ha-1), and high in available potassium (335.4 kg ha-1). The soil was alkaline in reaction (pH 7.8). The experiment was laid out in randomized block design with 17 treatments having three replications. The treatments comprising two fertilizers level i.e., Recommended dose of fertilizer (RDF) (150 kg N + 60 kg P2O5 + 60 kg K2O ha-1) and 75% of RDF and supplemented with foliar application of water soluble fertilizers viz. Urea phosphate (17:44) @ 1.5%, NPK (18:18:18) @ 1.5%, ZnSO4 @ 0.5% and Urea 2% at different stages. One treatment was control where no fertilizer applied. Growth parameters viz, plant height, dry matter accumulation, crop growth rate and leaf area index were increased with T9 i.e., RDF along with foliar application of water soluble fertilizers NPK (18:18:18) @ 1.5% at 40 DAS followed by Urea phosphate (17:44) @ 1.5% at 65 DAS. Among treatments, application of RDF along with foliar application of water soluble fertilizers NPK (18:18:18) @ 1.5% at 40 DAS followed by Urea phosphate (17:44) @ 1.5% at 65 DAS exhibited the highest values of yield attributes, viz. effective tillers/ meter row length (mrl), number of spikeletes/spike, number of grains/spike and 1000-grains weight which led to the highest grain yield (6220 kg ha-1) However, alternate application of NPK (18:18:18) @ 1.5% and Urea phosphate (17:44) @ 1.5% or vice versa produced statistically similar grain yield of wheat at the same level of fertilizer application. RDF or 75% RDF along with foliar application of NPK (18:18:18) @ 1.5% was slightly superior as compared to RDF or 75% RDF along with foliar application of Urea phosphate (17:44) @ 1.5% irrespective of time of application.

Foramen Magnum and Dental Osteometry of Balami, Uda, and Yankasa Breeds of Sheep

The increasing demand for animal protein, particularly meat, requires a thoughtful approach to selecting the type of meat-producing animal to achieve maximum yields. This is crucial to maintain food security. This study aimed to evaluate and compare some skull osteometries. A total of 60 each of Balami, Uda, and Yankasa sheep (30 adult males and 30 adult females) were used in this study. The skulls were macerated using a hot water technique. Then 7 parameters were measured using a digital Vernier caliper. The obtained data were analyzed using ANOVA (p &lt; 0.05). The result of this study was that the mean foramen magnum height (FMH) was highest, medium, and lowest in the Balami (2.1 ± 0.1 cm), Uda (1.9 ± 0.1 cm), and Yankasa (1.8 ± 0.0 cm) breeds, respectively, and vice versa in the foramen magnum index (FMI). The foramen magnum width (FMW) was similar in Balami and Uda but higher than in Yankasa (1.8 ± 0.1 cm). The FMH, FMW, and FMI were similar within sexes of the same breeds in Balami, Uda, and Yankasa. The mean dental length (DL), oral palatal length (OPL), and length of the upper molar row (LUM) were highest and lowest in Balami and Yankasa, respectively, while the mean length of the upper premolar row (LUP) was highest and lowest in Balami and Uda, respectively. The (DL), (OPL), (LUM), and (LUP) were higher in males than females in Balami and vice versa in Uda and Yankasa. In conclusion, craniometric values, including foramen magnum and dental osteometry, of indigenous Nigerian sheep breeds were used to compare them to other breeds and among themselves. It could also guide oral surgery and assist in identifying sheep breeds through comparative study.

Effects of Herbicides and Nano Urea Mixture on Weeds, Yield Attributes and Yield of Wheat (Triticum aestivum)

Wheat (Triticum aestivum) is second most important staple crop in India after rice. Weeds have emerged as the major biotic stress in wheat. Post-emergence herbicidal combinations are used widely to control the complex weed flora in wheat crops. A field experiment was carried out to study the “Effects of herbicides and nano urea mixture on weeds, yield attributes and yield of wheat (Triticum aestivum)”. The experiment was performed in randomized blocked design with three replications and fourteen treatments in Rabi season 2022-23 at Agronomy Research Farm, CCS Haryana Agricultural University, Hisar. Significantly minimum weed count (1.52 m-2) and dry weight (1.49 g m-2) and maximum weed control efficiency (88.6%) of Phalaris minor and broadleaved weeds (87%) was recorded with application of clodinafop + metribuzin 60 + 210 g ha-1 with nano urea 3 ml L-1 followed by clodinafop + metribuzin 60 + 210 g ha-1 at 90 DAS. In case of yield attributes i.e. number of effective tillers per meter row length (92.5), spike length (11.4 cm), number of grains spike-1 (55.9) and 1000-grain weight (43.8) were higher with application of clodinafop + metribuzin 60 + 210 g ha-1 with nano urea 3 ml L-1 followed by clodinafop + metribuzin 60 + 210 g ha-1. Grain yield (5876 kg ha-1) and B:C (1.94) was recorded higher with application of clodinafop + metribuzin 60 + 210 g ha-1 with nano urea 3 ml L-1 followed by clodinafop + metribuzin 60 + 210 g ha-1 which was significantly higher than weedy check but at par with the weed free treatment.

Effect of Seed Priming on Fodder Yield of Maize

The study on effect of seed priming on yield and quality of fodder maize was carried out at Main Forage Research Station, Anand Agricultural University, Anand during the rabi season 2020-21. The research comprised of ten treatments and four replications, and it was set up in a randomized block design. The results of the experiments revealed that different seed priming treatments failed to create a significant response on plant population per meter row length at 15 DAS, days to 50% flowering, and plant height at 20 DAS. The growth and yield attributes of fodder maize crop viz., periodical plant height at 40 DAS and at harvest, number of leaves per plant, leaf stem ratio, green fodder yield, dry fodder yield, dry matter, crude protein, acid detergent fiber and Neutral detergent fiber at harvest were significantly affected by different seed priming treatments and recorded significantly higher in treatment of Seed priming with ZnSO4 @ 0.5% for 6 hrs. and also reported maximum net realization with its BCR.

Performance Evaluation of 4-Wheel Tractor Drawn 3-Rows Precision Maize Planter for Mechanization of Maize Farming in Nepal

Hybrid winter maize is gaining popularity in the Terai region, as traditional maize growing practices are resource-consuming and labor-intensive. High inputs and labor costs have been a burden for hybrid maize growers. This study aimed to evaluate a Chinese-made 2BMZJ-3 model tractor-drawn 3-rows precision maize planter in actual field conditions and on-farm, comparing it with farmers' practices. The planter was hitched with 3-point linkages at the rear of a 35 hp tractor and could be operated in both tilled and no-tilled conditions. The seed rate was about 20 kg/ha, with a germination of 98% and an average of 4-5 plants/m² of length of row. The actual field capacity was 0.38 ha/hr in clay loam soil with an initial moisture of 26.11% and a bulk density of 1.18 g/cm³. The total cost of sowing was NRs 4050/ha, while the planting cost for farmers' practices was around NRs 7500/ha. The planter reduced the planting cost by 46% and increased the grain yield per unit area compared to farmers' practices. It is concluded that the maize planter not only reduces the planting cost but also increases grain yield per unit area.

Response of Organic and Inorganic Sources of Nitrogen Application in Wheat (Triticum aestivum L.) Crop

An experiment conducted at Agriculture Research Farm, Shri Durga Ji Post Graduate College, Chandeshwar, Azamgarh, Uttar Pradesh during winter session of 2019-20. Among the initial plant population per square meter was not influenced significantly due to various treatments. All the growth characters viz. plant height (cm), no. of shoots per meter row length and accumulation of dry matter, increased significantly at all the stages of crop growth with the application of 100% nitrogen through inorganic source except 30 DAS regarding to number of shoots.

Effect of Foliar Application of Water-Soluble Fertilizers on Growth and Yield of Wheat (Triticum aestivum L.)

Direct fertilizer application to leaves stimulates leaf activity, which directly affects the plant's water uptake and promotes root growth. Foliar fertilizers can therefore hasten the uptake of nutrients from the soil, which is advantageous for plants that need urgent nutrient intervention. A field experiment was carried out at Junagadh Agricultural University, Junagadh during rabi season of 2019-20 to evaluate effect of foliar spray of water-soluble fertilizers on wheat (Triticum aestivum L.) growth and yield. The experimental trial consists of 12 treatments with 3 replication and randomized block design. The results of the experiment revealed that the growth parameters viz., plant height and number of effective tillers metre-1 row length at harvest increased significantly with the application of T2 + foliar spray of 19:19:19 @ 0.5% at 60 DAS &amp; 90 days after sowing (DAS) whereas plant population were not affect significantly by application of different treatments. There was also significant improvement in grain and straw yields were observed with the application of T8 over 75% recommended dose of fertilizer (RDF) and 100% RDF.

Sugarcane Row Gaps Assessment over Successive Burned and Unburned Annual Harvests

Mechanized harvesting operations promote a series of benefits to sugarcane production but are also a cultivation step responsible for developing a series of problems for the soil and the plants due to plant mechanical damage, resulting in a decline in production over successive cycles due to row gaps emergence. The objective of this study was to evaluate the impact of burned and unburned harvesting systems on the occurrence of sugarcane row gaps over annual harvests. For this study, a burned and an unburned area were selected. The row gap number and length (sum of gaps, m) were measured after the sugarcane planting and plant-cane cultivation stages and after the first, second, and third sugarcane ratoon harvests. The results revealed that there was no difference in the number and length of row gaps between the burned and unburned harvesting systems. However, the row gap number and length considerably increased after the second harvest in both treatments (burned and unburned). The row gap number and length were close to 5 and 1–5 m at the planting and plant-cane cultivation stages and increased to around 60 and 70 m as the harvest progressed, respectively, in burned and unburned harvesting. Our results suggest that row gaps in sugarcane fields are independent of the burned or unburned sugarcane harvesting system but increase as the number of harvests increases.

Performance of second crop maize hybrids in different population densities

The cultivation of second crop (safrinha) maize (Zea Mays L.) has progressed in Brazil. The maize plant population recommendation for the second crop is drastically reduced. This work aimed to evaluate the morphophysiological characters of ear and yield components in different populations of plants and maize hybrids. The experiment was cultivated in a no-tillage system in the second crop of the 2019/2020 agricultural year in Unaí-MG and carried out according to a randomized block design in subdivided plots, with the five simple maize hybrids KWS (K9105VIP3, K9960VIP3, K9606VIP3, K9555VIP3 and K8774PRO3) considered as parcels and the four populations (35.000, 50.000, 65.000 and 80.000 plants he-1), considered as subplots. The maize hybrids did not influence (P&gt;0,05) the variables. The populations of 35.000, 65.000 and 80.000 plants he-1 resulted in the highest (P&lt;0,05) number of rows, number of grains per row and ear length. The increase in plant population influenced (P&lt;0,05) positively the grain yields up to the population of plant density of 68.200 plants he-1 with grain yield of 9.302 kg he-1. Population densification, even increasing competition for resources negatively influencing most plant and ear characters, increases grain yield due to the greater amount of ear per area.