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A field experiment was conducted in Madhya Pradesh, India during 1998 and 1999 to study the effects of phosphorus-enriched compost (phospho-compost) on the yield and uptake of phosphorus by soyabean (G. max) cv. JS 335. The phospho-compost was prepared by mixing wheat (Triticum aestivum) stubble, soyabean straw and linseed (Linum usitatissimum) straw in equal proportion, cattle dung, soil and well-decomposed farmyard manure at a ratio of 8:1:0.5:0.5, and supplementing these with low-grade Jhabua rock phosphate of 100 mesh (containing 20% P₂O₅) at 12.5 and 25% of the total compost material. These 2 types of phospho-composts, each prepared for 3 1/2 months, were significantly superior to plain compost (with no incorporation of Jhabua rock phosphate) in terms of NH₄⁺-N (216 and 256 mg/kg), NO₃^--N (300 and 355 mg/kg), total N (1.09 and 1.17%), water-soluble P (370 and 520 mg/kg …