Effect of farmyard manure, phosphorus and zinc on blackgram (Phaseolus mungo)-wheat (Triticum aestivum) cropping sequence under Vertisols of Chhattisgarh plains

2003

A:PS

An experiment was conducted during the rainy and winter seasons of 1997-2000 in Raipur, Madhya Pradesh, India, to study the effect of different levels of farmyard manure (FM), P and Zn on the productivity of black gram (P. mungo [Vigna mungo]) cv. RU 9401-2 and wheat cv. Sujata cropping sequence. The treatments consisted of 2 levels of FM (without and with FM at 5 tonnes/ha), 3 levels of P (0, 8.6 and 17.2 kg/ha) and 2 levels of Zn (0 and 15 kg ZnSO4/ha). Application of 5 tonnes FM/ha resulted in significantly higher yield of black gram (599 kg/ha) and wheat (1347 kg/ha) than without FM. The wheat equivalent yield also followed the same trend under this treatment. Among the P levels, 17.7 kg/ha resulted in significantly highest yield of black gram (628 kg/ha), comparable yield of wheat (1307 kg/ha) with 8.6 kg P/ha (1255 kg/ha), and highest wheat equivalent yield (2984 kg/ha) and net returns (Rs 9334/ha). Zn levels did not show significant effect on black gram and wheat yields. There was build up in soil nutrient status after 3 years, even in the absence of FM, under black gram-wheat cropping sequence.

v.73(2):72-74, INDIAN JOURNAL OF AGRICULTURAL SCIENCES

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