Abstract
An experiment was conducted to investigate the impact of flatbed (FB), ridges and furrows (RF) and broad bed furrows (BBF) combined with recommended fertilizer dose N30P60K30 kg ha−1 (F1), 75 % NPK (F2), 125 % NPK (F3), 75 % NPK + 25 % N through farm yard manure (FYM)-F4, 75 % NPK + 2 sprays of micro nutrient mixture (Fe, Zn, Cu, Mn, B and Mo) - 0.5 % at 35 and 60 days after sowing (DAS)-F5 and 75 % NPK + 2 sprays of KNO3 - 0.5 % at 35 and 1.0 % at 60 DAS (F6) on the productivity of soybean in a split plot design. BBF stored 14.15 % more soil water and produced 1058.97 kg ha−1 more yield than FB. A significant 3.76 kg ha−1-mm rain water use efficiency was notice in BBF compared to FB. The yield increment recorded under F6 was 15.6 % higher than F1. Grain nitrogen and oil contents were highest in F3. The residual soil fertility was much improve by F3 and F5. Our result demonstrated that the combination of BBF and F6 were the best technique to increase soybean yield in the Vertisol soil.
Highlights
Soybean (Glycine max (L.) Merrill.) is the most important oil seed crop in India, owing to its several domestic and industrial uses, besides its use in numerous food preparations and animal feed formulations
Soil moisture content increased gradually from 30 to 90 DAS in the broad bed furrow (BBF) and ridges & furrow (RF), compared to FB which recorded a decrease at 90 DAS
RF stored a significant amount of moisture on 60 and 90 DAS (27.29 % and 18.30 %, respectively) than FB
Summary
Soybean (Glycine max (L.) Merrill.) is the most important oil seed crop in India, owing to its several domestic and industrial uses, besides its use in numerous food preparations and animal feed formulations. Under rain fed systems, soil moisture stress of 15-21 days at any growth phase of the soybean crop results in a significant yield loss in the Maharashtra State (Patil, 1992). These yield losses are especially severe in the early determinate genotypes (Chaturvedi et al, 2012). Water and nutrient conservation technologies are the key adaptation strategies to mitigate the rapid loss of moisture (Kurukulasuriya & Rosenthal, 2003); and help plants withstand the occurrence of short dry spells under rain fed farming. The inadequate and imbalance fertilization practiced by farmers, adds to the problem of decreasing yield (Chaturvedi et al, 2012)
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