REFERENCES
- Aulakh , M. S. , Kabba , B. S. , Baddesha , H. S. , Bahl , G. S. and Gill , M. P.S. 2003 . Crop yields and phosphorus fertilizer transformations after 25 years of applications to a subtropical soil under groundnut-based cropping systems. . Field Crops Res. , 83 : 283 – 296 .
- Aulakh , M. S. , Khera , T. S. , Doran , J. W. and Bronson , K. F. 2001 . Managing crop residue with green manure, urea, and tillage in a rice-wheat rotation. . Soil Sci. Soc. Am. J. , 65 : 820 – 827 .
- Aulakh , M. S. and Pasricha , N. S. 1997 . Effect of green manuring and fertilizer N application on enhancing crop productivity in mustard-rice rotation in semiarid subtropical region. . European J. Agron. , 8 : 51 – 58 .
- Aulakh , M. S. and Pasricha , N. S. 1999 . Effects of rate and frequency of applied P on crop yields, P uptake, and fertilizer P use-efficiency and its recovery in a groundnut-mustard rotation. . J. Agric. Sci. Cambridge , 132 : 181 – 188 .
- Aulakh , M. S. and Sharma , P. 2005 . “ Nutrients dynamics and their efficient use in pulse crops ” . In Pulses. Edited by: Singh , G. , Sekhon , H. S. and Kolar , J. S. 241 – 278 . Udaipur, , India : Agrotech Publishing Academy . In:
- Aulakh , M. S. , Singh , D. and Sadana , U. S. 2004 . Direct and residual effects of green manure and fertilizer nitrogen in a rice-rapeseed production system in the semiarid subtropics. . J. Sustainable Agric. , 25 : 97 – 114 .
- Bahl , G. S. and Pasricha , N. S. 1998 . Efficiency of P utilization by pigeonpea and wheat grown in a rotation. . Nut. Cycling Agroecosyst. , 51 : 225 – 229 .
- Brar , S. P.S. and Bishnoi , S. R. 1987 . Effect of temperature and soil P status on Olsen's extractable phosphorus-development of correction factor. . Analyst , 112 : 917 – 919 .
- Cochran , W. G. and Cox , G. M. 1950 . Experimental Designs. New York : John Wiley and Sons .
- Dev , G. 1994 . Phosphorus Researches in India. 154 Haryana, , India : Potash and Phosphate Institute of Canada, India Programme, Gurgaon . +v.
- Gardner , W. K. , Barber , D. A. and Parbery , D. G. 1983 . The acquisition of phosphorus by Lupinus albus L. III. The probable mechanism by which phosphorus movement in the soil/root interface is enhanced. . Plant and Soil , 70 : 107 – 124 .
- Halvorson , A. D. and Black , A. L. 1985 . Long-term dryland crop responses to residual phosphorus fertilizers. . Soil Sci. Soc. Am. J. , 49 : 928 – 933 .
- Hundal , H. S. and Sekhon , G. S. 1976 . Efficiency of Mussoorie rock phosphate as a source of fertilizer phosphorus to guar (Cyamopsis tetragonoloba) and groundnut . (Arachis hypogaea). J. Agric. Sci. Cambridge , 87 : 665 – 669 .
- Kabba , B. S. and Aulakh , M. S. 2004 . Climatic conditions and crop residue quality differentially affect N, P and S mineralization in soils with contrasting P status. . J. Plant Nutr. Soil Sci. , 167 : 596 – 601 .
- Kalra , Y. P. and Soper , R. J. 1968 . Efficiency of rape, oat, soybean and flax in absorbing soil and fertilizer phosphorus at seven stages of growth. . Agron. J. , 60 : 209 – 212 .
- Marschner , H. 1995 . Mineral Nutrition of Higher Plants, 2ndEdition. San Diego, CA : Academic Press .
- Olsen , S. R. and Sommers , L. E. 1982 . “ Phosphorus. ” . In Methods of Soil Analysis, Part 2, , 2nd Edition Edited by: Page , A. L. , Miller , R. H. and Keeney , D. R. 403 – 448 . Madison, WI : Soil Science Society of America . In:
- Pasricha , N. S. , Aulakh , M. S. and Vempati , R. 2002 . Evaluation of available phosphorus soil test methods for peanut in neutral and alkaline soils. . Commun. Soil Sci. Plant Anal. , 33 ( 19&20 ) : 3593 – 3601 .
- PAU . 2005 . Package of Practices for Rabi (winter) Crops. Ludhiana, Punjab, , India : Directorate of Extension Education, Punjab Agricultural University .
- Reddy , M. N. and Surekha , K. 1999 . Role of chickpea in enhancing available P in chickpea-rice system in Vertisol. . J. Indian Soc. Soil Sci. , 77 : 805 – 808 .
- Sekhon , B. S. , Thapar , S. , Dhillon , K. S. and Singh , R. 1987 . Effect of applied nitrogen on N2 fixation, assimilation of nitrate and ammonia in nodules of field-grown moong . (Vigna radiata). Annals of Botany , 60 : 613 – 620 .
- Singh , V. K. , Dwivedi , B. S. , Shukla , A. K. , Chauhan , Y. S. and Yadav , R. L. 2005 . Diversification of rice with pigeonpea in a rice-wheat cropping system on a Typic Ustochrept: Effect on soil fertility, yield and nutrient use efficiency. . Field Crops Res. , 92 : 85 – 105 .
- Tandon , H. L.S. 1987 . Phosphorus Research and Agricultural Production in India. 160 New Delhi, , India : Fertilizer Development and Consultation Organisation . +xii.
- Tandon , H. L.S. 1993 . Methods of Analysis of Soils, Plants, Waters and Fertilizers. 144 New Delhi, , India : Fertilizer Development and Consultation Organisation .
- Westerman , R. L. 1990 . Soil Testing and Plant Analysis, , 3rd Edition Madison, WI : Soil Science Society of America .