Organic matter and nitrogen returns to soil by different cropping systems rotations on a vertisol in the Indian semi-arid tropics
2011
m d s abdurahman
Organic matter plays an important role in soil management and crop production:It is the natural source of mineral N. The results of the experiments carried out show theimportance of quantifying the organic matter inputs to the soil by different croppingsystems rotations. The results show that in the absence of N fertilizers, S/PP S/PP candeposit in the soil a substantial (2395 kg ha-') amount of root organic matter on the otherhand the non-leguminous system StSAF S+SAF contribute 1652 kg ha1 of root organicmatter to the soil. But if the crops are given adequate N fertilizer the results show thatalmost similar mounts of root can be deposited even by the non-leguminous system. Thesane findings were observed in the case of N content of the roots deposited to the soil bythe different crops in the different systems. Legumes can also contribute to the organicmatter of the soil by way of fallen dry leaves, which if incorporated into the soilmineralize and conitributes ubstantial amounts of N
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