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Academic literature on the topic 'Nitrogen rates and split application CO-Coimbatore'
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Journal articles on the topic "Nitrogen rates and split application CO-Coimbatore"
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Achieng, George O., Samwel O. Nyandere, Philip O. Owuor, Gordon O. Abayoand, and Chrispine O. Omondi. "Effects of Rate and Split Application of Nitrogen Fertilizer on Yield of Two Sugarcane Varieties from Ratoon Crop." Greener Journal of Agricultural Sciences 3, no. 3 (2013): 235–39. https://doi.org/10.15580/GJAS.2013.3.102712155.
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Nitrogen fertilizers applied either in single or split application is the main agronomic inputs to sugarcane production. The objective of this study was to determine the effects of nitrogen fertilizer rates and split application on yield of first ratoon crop of late (CO 421) and early maturing (D 8484) sugarcane varieties. Analysis of variance at p≤0.05 indicated that the mean yields were 117.6 and 124.3 ton cane per hectare for CO* 421 and D* 8484 respectively at harvesting. This study showed that there was no significant difference in the effects of nitrogen fertilizer rate and split application on yield.
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Smoleń, Sylwester, Włodzimierz Sady, and Joanna Wierzbińska. "The Effect of Various Nitrogen Fertilization Regimes on the Concentration of Thirty Three Elements in Carrot (Daucus Carota L.) Storage Roots." Vegetable Crops Research Bulletin 74, no. 1 (2011): 61–76. http://dx.doi.org/10.2478/v10032-011-0005-7.
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The Effect of Various Nitrogen Fertilization Regimes on the Concentration of Thirty Three Elements in Carrot (Daucus CarotaL.) Storage RootsNitrogen fertilization can affect the uptake and accumulation of nutrients, heavy metals and trace elements in plants. The aim of the study was to evaluate the influence of nitrogen application on mineral composition of carrot storage roots. In 2003-2005 field experiment with carrot ‘Kazan F1’ cv. was conducted in Trzciana (50°06' N, 21°85' E, South-East Poland), each year on a different site within a single soil complex. The experiment was arranged in a split-plot design with four replications. The following combinations with various nitrogen fertilization regimes (presented as kg N·ha-1) were distinguished: 1 - Control, 2 - Ca(NO3)270, 3 - Ca(NO3)2 70+70, 4 - (NH4)2SO470 and 5 - (NH4)2SO470+70; where 70 kg N·ha-1was used pre-sowing, whereas 70+70 kg N·ha-1was applied in two rates: pre-sowing and as top-dressing. Solid nitrogen fertilizers were added to the soil in the form of: Ca(NO3)2(15.5% N) and (NH4)2SO4(21% N). In carrot storage roots as well as in soil samples collected after carrot cultivation, the content of the following elements was determined: Ag, Al, As, B, Ba, Ca, Ce, Co, Cr, Dy, Fe, Ga, In, K, La, Li, Lu, Mg, Mn, Na, Ni, P, Pb, Tm, S, Sb, Sc, Sn, Sr, Ti, Y, Yb and V. Fertilization with nitrogen had significantly influenced the accumulation of Ba, Co, Dy, In, Lu, Mg, Ni, P, Pb, S, Sb, Sc, Sn and Y in carrot roots. In particular combinations, a diverse effect of N application was observed in reference to the content of mentioned elements. Revealed differences in the soil level of tested elements did not correlate (were not reflected) with the rate of its accumulation in carrot storage roots.
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Zvomuya, Francis, and Carl J. Rosen. "Evaluation of Polyolefin-coated Urea for Potato Production on a Sandy Soil." HortScience 36, no. 6 (2001): 1057–60. http://dx.doi.org/10.21273/hortsci.36.6.1057.
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Field studies were conducted on a Hubbard loamy sand (sandy, mixed, frigid Entic Hapludoll) during 1996 and 1997 at Becker, Minn., to evaluate the effect of a polyolefin-coated urea (POCU) fertilizer (Meister, Chisso Co., Japan) on yield and quality of irrigated `Russet Burbank' potatoes (Solanum tuberosum L.). The POCU was a 3:1 mixture of 70-day and 50-day release formulations, respectively, based on historical soil temperatures at the site. The study compared five banded nitrogen (N) rates (110, 155, 200, 245, and 290 kg·ha-1 N) as a split application of urea applied at emergence and hilling, vs. POCU applied at planting. All plants received an additional 30 kg·ha-1 N as monoammonium phosphate band-applied at planting. Yields were higher in 1996 because of cooler temperatures and poor tuber set in 1997. Total and marketable yields averaged, respectively, 3.9 and 3.3 Mg·ha-1 higher with POCU than with urea. Total yield was not affected by rate of N application regardless of source, but marketable yield increased linearly with N rate. The yield of marketable tubers larger than 170 g increased linearly with N rate in both years. Gross return was 10% higher with POCU than with urea, but estimated net return showed a significant sourc × N rate interaction. The net return increased by $3.13 per kg of urea-N applied, but there was no significant change across POCU application rates.
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RODENI, Muneer Ahmed, Shahmir Ali KALHORO, Altaf Hussain LAHORI, et al. "Application of potassium co-amended with boron for improving the potassium, boron, growth and yield components of wheat under the dry climate condition of Lasbela Balochistan." Scientific Review Engineering and Environmental Sciences (SREES) 33, no. 4 (2024): 352–71. https://doi.org/10.22630/srees.9875.
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A field experiment was performed to assess the impact of potassium co-amended with boron at different application rates on organic matter, nitrogen, phosphorus, potassium and boron in the soil, also in terms of plant height, spike length, pedicel length, leaf area, spike weight, grain weight, biological yield, fresh biomass and dry biomass of wheat under the dry climate of Uthal. Randomized complete block design (RCBD) was used with the combined application of both K and B fertilizers with a replicate of three times, treatments were T0 control, T1 70 K kg×ha–1 and 0.6 B kg×ha–1, T2 140 K and 1.2 B kg×ha–1, T3 210 K and 1.8 B kg×ha–1 of potassium and boron respectively. Furthermore, boron was applied in three split doses (time of sowing, maturity of plant, and booting stage); whereas potassium was used in two split doses (before sowing and maturity). The obtained results demonstrated that plant height was increased, ranging from 77.68 to 83.00 cm, with T3, biological yield 14,150.0–19,186.67 kg×ha–1 with T3, in-soil N 0.04–0.069% with T3, in-soil P 3.42–3.89 mg×kg–1 with T3, in-soil K 82.00–120.00 mg×kg–1 with T3, in-soil B 0.11–0.22 mg×kg–1 with T3 than control treatment. The uptake NPK, and B by the wheat plant was increased, ranging from 1.17–1.66% with T3, 0.33–0.54 mg×kg–1 with T3, 2.32–2.72 mg×kg–1 with T3, and 1.12–1.14 mg×kg–1 with T3 as compared with the control treatment. The plant fresh and dry biomasses and soil organic matter were increased at T3 over that of the control soil. Overall, the findings of this study indicated that the co-application of potassium and boron at 210 and 1.8 kg×ha–1 doses can be successfully used to enhance grain and yield parameters of wheat, particularly those cultivated in dry climatic conditions.
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Dong, Wenjun, Frederick Danso, Ao Tang, et al. "Biochar: An Option to Maintain Rice Yield and Mitigate Greenhouse Gas Emissions from Rice Fields in Northeast China." Agronomy 14, no. 12 (2024): 3050. https://doi.org/10.3390/agronomy14123050.
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Crop production is heavily dependent on fertilizers that negatively impact the environment; therefore, research on biochar to improve the soil’s properties and reduce greenhouse gas emissions has intensified over the years. To elucidate rice yield and greenhouse gas emission (GHG) arising from the application of biochar and N fertilizer on paddy soil in Northeast China, a 3-year (2015–2017) field experiment was established. Adopting a split-plot design with three replicates, two nitrogen (N) fertilizer levels in the main plots were designated as follows: 120 kg N ha−1 (N1, 2/3 of N application rate for optimal local rice yield); 180 kg N ha−1 (N2, full N application rate for optimal local rice yield); and four biochar application rates of no biochar (C0, control); 1.0 t ha−1 biochar (C1); 1.5 t ha−1 biochar (C2); and 2.0 t ha−1 biochar (C3) were designated as sub-treatments. The results showed that in 2015, biochar amendment increased GHG emissions while between 2016 and 2017, biochar amendment of 1.5 t ha−1 decreased CH4 emissions, global warming potential (GWP), and greenhouse gasses intensity (GHGI) by 11.3%, 10.9%, and 17.0%, respectively. On average, for the years 2016 and 2017, the N2O fluxes were 17.0% lower in the N2 plots compared to the N1 plots. Biochar amendment of 1.5 t ha−1 recorded an 8.6% increase in rice yield compared to the control. The soil properties of the study site showed that biochar amendment of 1, 1.5, and 2 t ha−1 augmented soil organic matter by 3.3%, 5.3%, and 5.2%, respectively, and soil phosphorus availability by 6.4%, 11.2%, and 22.6%, respectively. The co-application of biochar at 1.5 t ha−1 and 180 kg N ha−1 effectively regulated GHG emissions while maintaining crop yield. Appropriate co-application of biochar with N fertilizer can be adopted for emission reduction and rice yield maintenance while maintaining soil fertility in Northeast China.
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Li, Minglong, Yuye Wang, Pengmin Zhang, et al. "The Role of GmSnRK1-GmNodH Module in Regulating Soybean Nodulation Capacity." International Journal of Molecular Sciences 24, no. 2 (2023): 1225. http://dx.doi.org/10.3390/ijms24021225.
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SnRK1 protein kinase plays hub roles in plant carbon and nitrogen metabolism. However, the function of SnRK1 in legume nodulation and symbiotic nitrogen fixation is still elusive. In this study, we identified GmNodH, a putative sulfotransferase, as an interacting protein of GmSnRK1 by yeast two-hybrid screen. The qRT-PCR assays indicate that GmNodH gene is highly expressed in soybean roots and could be induced by rhizobial infection and nitrate stress. Fluorescence microscopic analyses showed that GmNodH was colocalized with GsSnRK1 on plasma membrane. The physical interaction between GmNodH and GmSnRK1 was further verified by using split-luciferase complementary assay and pull-down approaches. In vitro phosphorylation assay showed that GmSnRK1 could phosphorylate GmNodH at Ser193. To dissect the function and genetic relationship of GmSnRK1 and GmNodH in soybean, we co-expressed the wild-type and mutated GmSnRK1 and GmNodH genes in soybean hairy roots and found that co-expression of GmSnRK1/GmNodH genes significantly promoted soybean nodulation rates and the expression levels of nodulation-related GmNF5α and GmNSP1 genes. Taken together, this study provides the first biological evidence that GmSnRK1 may interact with and phosphorylate GmNodH to synergistically regulate soybean nodulation.
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Yang, Linsheng, Prakash Lakshmanan, Debao Tu, et al. "Co‐Benefits of Yield and Nitrogen Use Efficiency Gains Through Combined Use of Controlled‐Release Urea and Conventional Urea in Rice." Food and Energy Security 14, no. 1 (2025). https://doi.org/10.1002/fes3.70043.
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ABSTRACTCombined use of controlled‐release urea and conventional urea (CCU) is considered a practical strategy to simultaneously achieve the dual benefits of crop yield and nitrogen use efficiency (NUE). However, the overall impact of CCU on rice production is not well understood. A meta‐analysis was conducted to determine the effect of CCU on rice yield and NUE in China. The results revealed that CCU increased rice yield by 6.22% and NUE by 16.5% compared with conventional urea. Significant yield and NUE gains from CCU were evident only when the ratio of controlled‐release urea to total nitrogen input reached 0.6 or above. Rice yield and NUE were increased simultaneously at nitrogen rates ranging from 150 to 225 kg ha−1, with no significant improvement in grain yield and NUE with nitrogen supply beyond 290 and 327 kg ha−1, respectively. In addition, rice yield and NUE were significantly greater with split rather than single application of CCU. Also, rice yield and NUE were increased when mean annual temperature (MAT), mean annual precipitation (MAP) and soil available nitrogen (AN) were more than 10°C, 800 mm, and 50 mg kg−1, respectively. Soil pH and organic matter content were significant determinants of rice yield and NUE gains with CCU. Our findings clearly demonstrate that the combined use of controlled‐release urea and conventional urea will deliver significant gains in rice yield and NUE and that it should be proposed as an effective measure for sustainable rice production.
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Hall, Jean A., Gerd Bobe, Shelby J. Filley, et al. "Impact of selenium biofortification on production characteristics of forages grown following standard management practices in Oregon." Frontiers in Plant Science 14 (March 31, 2023). http://dx.doi.org/10.3389/fpls.2023.1121605.
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IntroductionLow selenium (Se) concentrations in soils and plants pose a health risk for ruminants consuming locally-grown forages. Previous studies have shown that Se concentrations in forages can be increased using soil-applied selenate amendments. However, the effects of foliar selenate amendments applied with traditional nitrogen-phosphorus-potassium-sulfur (NPKS) fertilizers on forage yields, and nutrient contents, and agronomic efficiencies are unknown.MethodsUsing a split plot design, we determined the effects of springtime sodium selenate foliar amendment rates (0, 45, and 90 g Se ha-1) and NPKS application (none, NPK for grasses/PK for alfalfa, and NPKS/PKS fertilization at amounts adapted to meet local forage and soil requirements) on forage growth and N, S, and Se concentrations, yields, and agronomic efficiencies. This 2-year study was conducted across Oregon on four representative forage fields: orchardgrass (Dactylis glomerata L.) in Terrebonne (central Oregon), grass-clover mixture in Roseburg (southwestern Oregon), and both grass mixture and alfalfa (Medicago sativa L.) fields in Union (eastern Oregon).ResultsGrasses grew poorly and were low in N content without NPK fertilization. Fertilization with NPK/PK promoted forage growth, increased forage N concentrations, and had to be co-applied with S when plant available S was low. Without Se amendment, forage Se concentrations were low and further decreased with NPKS/PKS fertilization. Selenate amendment linearly increased forage Se concentration without adversely affecting forage yields, N and S concentrations, or N and S agronomic efficiencies.DiscussionImportantly, S fertilization did not interfere with Se uptake in Se amended plots. In conclusion, co-application of NPKS/PKS fertilizers and foliar sodium selenate in springtime is an effective strategy to increase forage total Se concentrations, while maintaining optimal growth and quality of Oregon forages.