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- W2912954425 abstract "The effect of long-term manuring and fertilization on depth-wise distribution of potassium (K) fractions under sorghum-wheat cropping sequence in Vertisols was studied under the long-term fertilizer experiment (AICRP's) at Akola, Maharashtra. The treatments comprised of 50% NPK, 100% NPK (P applied through SSP), 150% NPK, 100% NPK(−S), 100% NPK + Zn @ 2.5 kg ha−1, 100% NP, 100% N, 100% NPK + FYM @ 5 t ha−1, 100% NPKS, FYM @ 10 t ha−1 to sorghum and wheat, 75% NPK + 25% N through FYM and Control laid out in randomized block design. The results of the present study revealed that, application of 100% NPK + FYM @ 5 t ha−1 significantly increased the fractions of K viz., available K (210 mg kg−1), water soluble K (8.75 mg kg−1), exchangeable K (201 mg kg−1), non-exchangeable K (945 mg kg−1) and lattice K (17078 mg kg−1) in 0–15 cm depth. Similar trends in K fractions were also noted in 15–30 and 3045 cm depths. The sequential order of dominance of different fractions of K were: lattice K > nonexchangeable K > exchangeable K > available K > water soluble K. The highest negative balance of K was recorded with the application of 100% NP (−3513 kg ha−1) followed by 100% NPK + FYM @ 5 t ha−1 (−3110 kg ha−1) and 150% NPK (−2838 kg ha−1). The application of NPK + FYM (470 kg ha−1), 150% NPK (432 kg ha−1) and 100% NPK (378 kg ha−1) resulted in improving the status of available K over its initial (358 kg ha−1) status. The grain yield of sorghum and wheat was influenced significantly with the application of NPK + FYM (5.27 and 3.39 t ha−1) followed by 150% NPK (4.87 and 3.21 t ha−1). The SYI of the system was improved with NPK + FYM as compared to control for sorghum (−0.008) and wheat (0.004). The contribution of non-exchangeable K to total uptake was higher in NP (3316 kg ha−1) followed by NPK + FYM (3060 kg ha−1). All the K forms showed significant and positive correlation with yield and uptake of K. There exists a significant and positive correlation indicating dynamic equilibrium among all forms of K." @default.
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- W2912954425 date "2018-01-01" @default.
- W2912954425 modified "2023-10-04" @default.
- W2912954425 title "Effect of long-term manuring and fertilization on depth wise distribution of potassium fractions under sorghum-wheat cropping sequence in vertisol" @default.
- W2912954425 doi "https://doi.org/10.5958/0974-0228.2018.00022.1" @default.
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