Abstract
A field experiment was conducted during 1986-87 on a sandy clay loam calcareous soil, relatively high in available P (11 nig/kg in 0- i 5 cm soil layer), to find out an efficient source and dose of P fertilizer on rice cultivar IRRI-6 and its residual effect on succeeding wheat cultivar LU-31 and to see the effect of rock phosphate applied to wheat. Paddy yield remained unaffected by P application, possibly because the soil was not deficient in P. However, single superphosphate % 60 kg P2 0 5 /ha increased the rice straw yield significantly. The residual effect on wheat grain yield of P applied to preceding rice crop and of rock phosphate applied to wheat was significant. Rock phosphate
TAHIR HUSSAIN, , K. PERVAZ, , M. KHALID , M. ASLAM* . (1987) EVALUATION OF AN EFFICIENT SOURCE OF PHOSPHOROUS FERTILIZER AND ITS RESIDUAL EFFECT UNDER RICE-WHEAT CROPPING SYSTEM, The Journal Soil & Environment , Volume 2, Issue (1-4).
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