Phosphorus management in rice (Oryza sativa)-wheat (Triticum aestivum) cropping system
2000
Katyal, V. | Gangwar, K.S. | Gangwar, B. | Singh, K.P. (Project Directorate for Cropping Systems Research, Meerut (India))
The trials on rice (Oryza sativa L.)-wheat (Triticum aestivum L. emend. Flori & Paol.) cropping system were conducted during 1991-95 at Palampur, R.S. Pura and Varanasi centres of All-lndia Co-ordinated Research Project on Cropping Systems for determining the frequency of phosphorus application, so as to make judicious use of P fertilizer. Application of P2ose 90 kg/ha to both rainy season (kharif) and winter (rabl) season crops every year gave maximum system productivity of 8.6 tonnes/ha. However, farmers may apply 60 kg P2øslha every year to rabi crops with greater net returns of Rs 22,705/ha/year at Palampur, whereas application of 60 kg P 20s/ha to both kharif and rabi crops every year recorded higher net returns of Rs 26,298/ha/year at R.S. Pura. Similarly, application of 60 kg P2Os/ha to rabi crops in alternate year resulted in maximum net retums of Rs 29, 213/ha/year at Varanasi.
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