Abstract
Basic slag is a by-product in the manufacture of steel from pig iron and it owes its fertiliser properties to the phosphorus content of the by-product. The phosphorus content of the basic slag ranges from 2 to 16% of total phosphoric acid. A large number of experiments have been done with basic slag in Western countries. However, experiments with basic slag are very few in India (Raychaudri, 1960). So a study was made on rice to assess the relative merits of superphosphate, high-soluble basic slag and low-soluble basic slag with the objectives, (1) to study the relative merits of the high- soluble slag, low-soluble basic slag and superphosphate on equal dose of phosphoric acid and (2) to study the residual values of superphosphate, high-soluble slag and low-soluble slag applied to first crop of rice on the succeeding second crop of rice.
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