Abstract
Experiments were conducted during 1992-93 in sub-humid zone under rainfed condition, to find P requirement of maize grown with three tillage practices on different soil series. The tillage practices selected were zero tillage, cultivator and moldboard plough. The results revealed that P requirement depended upon soil inherent characteristics and tillage practices adopted. The pivotal soil characteristics which influenced P requirements were amount of clay, degree of calcareousness of soil, presence or absence of lime concretion zone within tillage depth, organic matter and soil reaction. Tillage practices influenced on moisture conservation and root penetration depth in soil, affected P requirement as well as grain yield of the crop. In general, P requirement for maize with zero tillage practice was highest, followed by cultivator and least with moldboard plough. However, in the case of soil having lime concretion zone within tillage depth, the requirement of P was greater with moldboard plough than with cultivator. The requirement fur selected soils with three tillage practices was different. The grain yield was highest with moldboard plough, followed by cultivator and least with zero tillage. However, the yield potential of various soils and difference in grain yield due to three selected tillage practices on a particular soil depended upon the inherent characteristics of the soil
M.M.I. Nizami, , M. Sharif Zia , M. Salim'. (1997) PHOSPHORUS REQUIREMENT OF MAIZE {ZEA MAYS. L) UNDER THREE TILLAGE PRACTICES IN DIFFERENT SOIL SERIES IN RAINFED CONDITIONS, The Journal Soil & Environment , Volume 13, Issue (1-4).
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