1Department of Soil Science, H.P. Krishi Vishvavidyalaya, Palampur - 176062, (HP).
A field experiment was conducted to study the effect of P, lime and animal manure on crop yields, in a potato-maize-potato-wheat cropping sequence at H.P. Agricultural University, Palampur. Phosphorus was applied as single superphosphate @ 0, 26, 52 and 78 kg P ha−1; lime as CaCO3 at 0 and 5 t ha−1; and well decomposed animal manure at 0 and 10 t ha−1. The direct P application, upto 78 kg P ha−1 to spring potato and, upto 52 kg P ha−1 to autumn polato, increased the potato yield significantly. The P applications also had a significant residual effect on yield of the following maize crop after spring potato and the wheat crop after autumn potato. The direct application of animal manure and lime to spring potato and their residual effect on the following maize crop was not found significant. However, the direct effcct on the following wheat crop was found significant.
