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Subject: Soil Science and Agriculture Chemistry ×

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Now showing 1 - 9 of 247
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    ThesisItemOpen Access
    Effect of Organic Manures and Iron Application on Soil Properties, Nutrient Availability and Yield of Wheat (Triticum aestivum L.) Under Alkali Water Irrigation
    (2022) Yadav, Poonam Kumari; Dadhich, S.K.
    The field experiment on “Effect of Organic Manures and Iron Application on Soil Properties, Nutrient Availability and Yield of Wheat (Triticum aestivum L.) Under Alkali Water Irrigation” was conducted for two consecutive years during the rabi seasons of the years 2019-20 and 2020-21 to evaluate the effect of alkali water, organic manures and iron application on soil properties (ECe, pHs, OC, ESP, CEC and different fractions of Fe), nutrient availability, dynamics of soil microbial biomass and enzymes activities, yield attributes and yield, nutrient concentration and alkalinity tolerance in wheat under loamy sand soil at Agronomy Farm, Sri Karan Narendra College of Agriculture, Jobner. The experiment comprising of 36 treatment combinations were replicated thrice and was laid out in split-plot design with 3 levels of alkali water (2, 6 and 10 mmol L-1 RSC), 3 treatments of organic manures (Control, FYM @ 15 t ha-1 and vermicompost @ 5 t ha-1 ) in main plots and 4 levels of iron (control, 50, 100 and 150 kg FeSO4.7H2O ha-1 ) in sub-plots. Result revealed that the increasing levels of RSC in irrigation water significantly decreased the ECe, organic carbon, available N, P and K content, different fractions of Fe and DTPA-Fe in soil after harvest of crop, while pHs and ESP of soil increased significantly during both the years and in pooled analysis. The soil biological activity viz., microbial biomass C, N and P at different months, their buildup, losses, turnover rate, fluxes, soil dehydrogenase and alkalinephosphatase enzymes activity was reduced significantly due to increasing levels of RSC in water. Irrigation with increasing levels of RSC in water significantly reduced the plant height, numbers of total tillers and effective tillers, test weight, grain and straw yields of wheat, nutrient concentration viz., P, K, Ca, Mg and Fe content and their uptake by grain and straw of wheat at harvest of crop. The uptake of N by grain, Ca/Mg ratio in wheat grain and ionic regulation index of potassium (IRI-K) decreased significantly due to irrigation with higher RSC water whereas, N content and its uptake by straw, Na content and uptake, Na/K, Na+K/Ca and Na/Ca ratio in grain and straw of wheat, degree of compartmentation and ionic regulation index of sodium (IRI-Na) significantly increased with increasing levels of RSC in irrigation water. Application of FYM @ 15 t ha-1 significantly increased the CEC, organic carbon content, available N, P and K content in soil after harvest of crop. The pHs and ESP of soil decreased significantly. The application of vermicompost @ 5 t ha-1 significantly increased fractions of iron in soil after harvest of crop. Soil microbial biomass C, N and P, their buildup, loss of P, annual fluxes, soil dehydrogenase enzyme activity and alkaline phosphatase activity at different months after sowing of crop increased significantly, while the loss of microbial biomass C and N decreased significantly under application of 15 t FYM ha-1 . The turnover rate of microbial biomass C, N and P decreased significantly under application of organic manures. Application of organic manures significantly increased the plant height, numbers of total tillers and effective tillers, test weight, grain and straw yields of wheat. A significant increase in nutrients content and uptake by grain and straw (N, P, K, Ca, Mg and Fe), Na uptake by grain and straw, Ca/Mg ratio in grain and ionic regulation index of potassium (IRI-K) at flowering stage of wheat was observed under vermicompost and FYM application. The content of Na, Na/K, Na+K/Ca and Na/Ca in grain and straw of wheat, degree of compartmentation, ionic regulation index of sodium (IRI-Na) at flowering stage significantly decreased due to application of vermicompost and FYM. The interactive effect of alkali water and organic manures significantly influenced the grain and straw yields of wheat and it was observed that the magnitude of decrease in grain and straw yields of wheat was observed to be less with the application of organic manures under all levels of RSC water. Application of iron significantly increased its fractions in soil at harvest of crop. The plant height, numbers of total tillers and effective tillers, test weight, grain and straw yields of wheat increased significantly with the application of iron. The content and uptake of N, K, Ca, Mg and Fe increased significantly, while uptake of P and Na by grain and straw of wheat increased significantly with the application of iron. The ratio of Ca/Mg in grain and straw of wheat and ionic regulation index of potassium (IRI-K) at flowering stage increased significantly under application of iron, whereas P and Na contents, Na/K, Na+K/Ca and Na/Ca ratios in grain and straw of wheat, degree of compartmentation and ionic regulation index of sodium (IRI-Na) were decreased significantly with the application of iron. The optimum dose of Fe was computed as 84.28 kg FeSO4.7H2O ha-1 with corresponding wheat grain yield of 3306.72 kg ha-1 in pooled analysis
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    ThesisItemOpen Access
    Characterization and Classification of Soils for Land Use Planning in Different Landforms in Jobner-Kalakh Area
    (2021) Fagodia, Suresh Kumar; Fagodia, Suresh Kumar; Sharma, S.S.; Sharma, S.S.
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    ThesisItemOpen Access