Effect of farmyard manure application on yield and soil fertility in rice-wheat rotation
1994
Brar, B.S. | Dhillon, N.S. (Punjab Agricultural Univ., Ludhiana (India). Soils Dept.)
Results showed that grain yield of both rice and wheat increased significantly with graded levels of FYM [farmyard manure]. The highest yield (6.7 t/ha) was obtained using 40 t FYM/ha over 4 yr in four equal splits. The residual effect of lower levels of FYM (10-20 t/ha) on wheat yield was not significant. Average yield of rice and wheat was significantly more when FYM was applied in four equal splits than as a single application. The effect was more pronounced in rice; the residual effect on wheat yield was also conspicuous. Soil organic carbon content improved with graded levels of FYM application from the initial value of 6050 kg/ha in Jun 1989 to 9600 kg/ha in May 1993. Soil organic carbon content was highest where FYM was applied at 40 t/ha. It was significantly higher where split doses of FYM were applied each year than where a single large application of FYM was made. To maintain soil fertility at higher levels and to obtain higher rice and wheat yields, FYM should be applied to rice each year in splits rather than as a single large dose
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