Welcome to Eprints@IARI

Abstract

The field experiments conducted during 2001–04 at New Delhi to study the effect of crop residue incorporation on the relative efficiency of diammonium phosphate and mussoorie rock phosphate at varying rate of application on growth, yield and economics of potato (Solanum tuberosum L.). Results showed phosphorus application significantly increased growth and yield parameters, yield (mean tuber yield 28.6, 27.5 and 26.6 tonnes/ha during 2001–02, 2002–03 and 2003– 04 respectively) and gross and net returns (mean Rs/ha 42 278; 39 379 and 37 158 during 2001–02, 2002–03 and 2003–04, respectively) of potato. Mussoorie rock phosphate as 80 kg P 2 O 5 /ha was at par with 40 kg P 2 O 5 /ha as diammonium phosphate in terms of yield and gross and net returns of potato. Residue incorporation significantly increased the efficiency of diammonium phosphate and mussoorie rock phosphate. The study shows that the mussoorie rock phosphate along with phosphates-solubilizing bacteria inoculation and residue incorporation can be used for phosphorus fertilization in potato crop for increasing productivity and higher net returns.