The field experiments were conducted at the Indian Agricultural Research Institute, New Delhi, India for 3 years from 2001-2002 to 2003-2004 to study the relative efficiency of diammonium phosphate (DAP) and Mussoorie rock phosphate along with phosphorus solubilizing bacteria inoculation (MRP ? PSB) at different rates of application on productivity and phosphorus balance in a ricerapeseed-mungbean cropping system. Phosphorus application significantly increased the productivity of rice-rapeseed-mungbean cropping system and resulted in an increase in 0.5 M NaHCO 3 extractable P content in soil. The relative agronomic effectiveness (RAE) of MRP ? PSB in relation to DAP as judged by the total productivity was 53-65% in the first cycle but reached 69-106% in the third cycle of the cropping system. The P balance (applicationcrop removal) was generally more positive for MRP ? PSB than DAP and the highest P balance was recorded with an application of 52.5 kg P ha -1 as MRP ? PSB, resulted in highest 0.5 M NaHCO 3 extractable P content in soil. The present study, thus, shows that MRP ? PSB could be usefully employed as an alternative to DAP in long term in the ricerapeseed-mungbean cropping system.

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The field experiment was conducted during rabi 2013-14 and 2014-15 at Agricultural Research Station, Sumerpur, Pali (Rajasthan), India to find out suitable organic nutrient management practices for higher productivity and economics of wheat in Luni basin region of Rajasthan. The experiment was laid out in RBD with seven treatments. The results in terms of growth and yield attributes, grain yield and economics of wheat under different treatments were significantly different than control. Pooled data of two years' experimentation revealed that the maximum plant height (85.83 cm), number of tillers per meter row length (91.00), number of seed per ear head (55.18), ear head length (9.60 cm), test weight (37.17 g) and grain yield (39.14 q ha -1 ) were recorded with application of FYM @ 10 t ha -1 +Vermicompost @ 1.25 t ha -1 followed by treatment FYM @ 5 t ha -1 +Neem green leaves @ 2 t ha -1 +Vermicompost @ 1.25 t ha -1 . Net return was recorded significantly highest with FYM @ 10 t ha -1 + Vermicompost @ 1.25 t ha -1 whereas B:C ratio (2.43) was highest with FYM @ 5 t ha -1 +Neem green leaves @ 2 t ha -1 +Vermicompost @ 1.25 t ha -1 . Application of FYM @ 5 t ha -1 +Neem green leaves @ 2 t ha -1 +Vermicompost @ 1.25 t ha -1 led to increase grain yield by 94.84% significantly over control (19.0 q ha -1 ). Hence, the finding suggested that the integration of FYM @ 5 t ha -1 +Neem green leaves @ 2 t ha -1 +Vermicompost @ 1.25 t ha -1 increased yields of organic wheat in semi arid regions. AbstractHanuman Prasad Parewa

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