The phosphorous nutrient index value estimated in the soils along the Yamuna River in Prayagraj falls into the low to medium fertility class. The inorganic forms of phosphorous, namely aluminium bound phosphorous (Al-P), represented 2.15 percent of total-P, resulting in a relatively low proportion, while calcium bound phosphorous (Ca-P), comprised 31.57 percent of total-P. The correlation coefficient (r) between Olsen P and forms of phosphorous saloid P (S-P) was extremely high among all (r = 0.979*) and occluded bound-P (Occl-P) was significantly associated among the inorganic forms (r = 0.767*). This suggests that Occl-P has a significant contribution to the available phosphorous, it is said to be that from the forms of phosphorous Saloid P and Organic P values should be raised and it is recommended that soils with low content of phosphorous are advised to apply organic manures and supplemented by applying of phosphorous fertilizers in the specified crop to increase the levels of P in the soil.
The purpose of this study was to evaluate the physico-chemical characteristics and nutrient availability of soil at various depths, i.e., 0-15cm, 15-30cm, and 30-45cm, from different blocks in the Komaram Bheem Asifabad district of Telangana. Results revealed that soil is moderately alkaline and slightly saline electrical conductivity. Low to medium organic carbon content and macronutrients viz. nitrogen and phosphorus are low to medium and medium to high potassium. Secondary nutrients i.e., calcium and magnesium are quite adequate. Micronutrients such as zinc, copper and Iron are found in permissible amount.
Cowpea [Vigna unguiculata (L.) is the most widely cultivated pulse crop of India. Deficiencies of micronutrients viz., Zn and B are a common problem in cowpea. Foliar Application is very effective to correct the micronutrient deficiencies in pulses, but it is too laborious. The Present Research was held at Research Farm, Department of Soil Science and Agricultural Chemistry, SHUATS, Prayagraj a field experiment was undertaken in the Zaid season 2021, With 9 treatments and 3 replications, the experiment was set up in a Randomized Block Design (RBD) results includes, the physico-chemical properties ranged optimum range and the available Zinc was found 0.46 to 0.38 in 0-15 mg kg-1 cm depth and 0.33 to 0.23 mg kg-1 in 15-30 cm depth. Available Boron was found 0.62 to 0.53 mg kg-1 in 0-15 cm soil depth and 0.36 to 0.29 mg kg-1 in 15-30 cm depth. Post-harvest available Zn and B content registered lower. This might be due to the antagonistic effect of Zn on B. And may be attributed to the fact that by the foliar application at 4th and 6th week, maximum nutrient was readily used up by the plant parts.
A field experiment was conducted during Rabi season (November 2021-February 2022) at Central Research Farm NAI. SHUATS, analysed under RBD having nine treatments and three replications having three level of Zinc 0%, 50%, 100% and three level of Iron 0%, 50%, 100%. The results reported the significant improvement in soil chemical properties (EC (dS m-1) Organic Carbon (%), Available Nitrogen (Kg ha-1). Available Phosphorus (kg ha-1), Available Potassium (Kg ha-1), Available Zinc (mg Kg-1), Available Iron (mg Kg-1). However, Bulk density (Mg m³), Particle density (Mg m³), pH showed Non-significant improvement. Chemical properties of the soil increased with application of levels of Zn and Fe, Available NPK, Zn and Fe where found in moderate range. The application of Zn and Fe significantly improved the soil Physico-chemical properties. Increase in level of Zn application decreased in available Fe and P in the soil and increase in level of Fe application increased in available P and decreased in available Zn in soil.
An experiment was conducted during Zaid season (May-July) 2021 on crop research farm Department of Soil Science & Agricultural Chemistry. The experiment was laid out in Randomized Block Design having three levels of Phosphorus @ 0%, 50 %, 100% and three levels of Sulphur @ 0%, 50% and 100% respectively. The treatment combinations were replicated three times and allocated at random in each replication. The result shows that the application of different levels combination of Phosphorus and Sulphur increased growth and yield of green gram and improved soil chemical properties. However, some parameters of soil physical properties decreased. It was recorded from the application of Phosphorus and Sulphur treatment T9 has maximum Bulk density 1.285 Mg m-3 in 0-15 cm and 1.286 Mg m-3 in 15-30 cm, Particle density 2.551 Mg m-3 in 0-15 cm and 2.552 Mg m-3 in 15-30 cm, % pore space 50.372% in 0-15 cm and 50.391% in 15-30 cm, Water holding Capacity 45.89 % in 0-15 cm and 45.78 % in 15-30 cm, pH 8.001 in 0-15 cm and 8.003 in 15-30 cm, EC 0.411 dSm-1 in 0-15cm and 0.413 dSm-1 in 15-30 cm, % Organic Carbon 0.413 % in 0-15 cm and 0.435 % in 15-30 cm, Available Nitrogen 238.152 kg ha-1 in 0-15 cm and 237.792 in 15-30 cm kg ha-1, Available Phosphorus 20.351 kg ha-1 in 0-15 cm and 16.432 kg ha-1 in 15-30 cm, Available Potassium 193.257 kg ha-1 in 0-15 cm and 182.975 kg ha-1 in 15-30 cm, Available Sulphur 15.986 kg ha-1 in 0-15 cm and 15.724 kg ha-1 in 15-30 cm.
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