HomeInternational Rice Research Notesvol. 28 no. 2 (2003)

Effect of Organic and Inorganic P Fertilizers on Sustainability of Soil Fertility and Grain Yield in a Rice-Pulse System

D. Selvi | S. Mahimairaja | P. Santhy | B. Rajkanman

Discipline: Agriculture



The use of indigenous rock phosphate (RP) as fertilizer is becoming increasingly important in India. The RP deposit in India was estimated to be about 260 t (Narayanasamy and Biswas 1998). Khasawnch and Doll (1986) reported that RP is as effective as water-soluble P fertilizer under suitable environments. As the availability of RP increases slowly and continuously when in contact with the soil, its effectiveness was two to three times more than that of triple superphosphate (Chien and Hammond 1988).