System Productivity and Balance of Soil Phosphorus in Rice - Zero till Maize (Zea mays L.) Cropping System as Influenced by Levels of Phosphorus

Aims: To study the phosphorus requirement of Rice - zero till maize (Zea mays L.) cropping system on productivity and soil available Phosphorus balance. Study Design: Randomized block design (two factors). Methodology: The field experiment was conducted for two consecutive years at College Agriculture, Rajendranagar, Hyderabad. Levels P2O5 (kg ha-1) applied to rice (5 levels) (3 respectively were (P0-30, P0-45, P0-60, P10-30, P10-45, P10-60, P20-30, P20-45, P20-60, P30-30, P30-45, P30-60, P40-30, P40-45 P40-60). Results: In terms (maize grain equivalent yield kg ha-1 annum-1) rice–maize system, P40-60 P30-60 treatments found better than other management strategies. balance sheet in end fourth season revealed that input-output positive with by specifying application 30 and/or 40 60 rice-zero system.