"7529","10","archive","329",,,"disk0/00/00/75/29","2014-02-19 06:39:47","2014-02-19 06:39:47","2014-02-19 06:39:47","article",,,"show","Library-ICRISAT@CGIAR.ORG",,,"","","","","","","","","","",,,,"Abdurahman","M D","","","","","","","Abdurahman","M D","","","","",,,,,"","",,,,,"","","ICRISAT(Patancheru)","India","Nitrogen returns to soil by selected cropping systems on a Vertisol in the semi-arid tropics of India","pub","s2.11","","","restricted",,,"Cropping systems, Nitrogen returns, Semi-arid tropics, Soil, Vertisol",,,"Limited nitrogen (N) availability is a common constraint for crop production on Vertisols. Erratic rainfall in the semi-arid tropics and relatively high cost of N fertilizers make its application a risky investment, therefore, most farmers do not apply N fertilizer in dryland crops. Cropping systems which improve soil fertility can minimize the need for synthetic fertilizers. In a two-year experiment, four cropping systems and mirror images of two systems were examined for their returns of N to soil in roots and fallen leaves. Sorghum/pigeonpea intercrop for two years (S/PP S/PP) and cowpea/pigeonpea intercrop rotated with sorghum followed by safflower (COW/PP S+SAF) contributed around 54 kg N ha-1 in roots and fallen leaves when no nitrogen fetilizer was applied. The largest proportion of this N was returned to soil through fallen leaves of pigeonpea. In terms of root mass a rotation of sorghum followed by safflower in the post-rainy season (S+SAF S+SAF) deposited almost the same amount of N in roots if adequately fertilized. Under S/PP S/PP the soil mineral N content was measurable higher compared to other systems.","1999","published",,"Crop Research (Hisar)","17","3","The Gaurav Society of Agricultural Research Information Centre (GSARIC)",,"273-281",,,,,,,,,,,"TRUE",,"0970-4884",,,,,,"",,"http://scholar.google.co.in/scholar?as_q=Nitrogen+returns+to+soil+by+selected+cropping+systems+on+a+Vertisol+in+the+semi-arid+tropics+of+India*&as_epq=&as_oq=&as_eq=&as_occt=title&as_sauthors=&as_publication=&as_ylo=&as_yhi=&btnG=&hl=en&as_sdt=0%2C5","pub",,"","",,,,,,"",,,,,,,"",,,,,"",,,,,"","",,,,,"","",,,,,
"7529",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,"Seeling","B","","",,,,,"Seeling","B","","",,,,,,,,,,,,,,,,,,,"s2.4",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
"7529",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,"Rego","T J","","",,,,,"Rego","T J","","",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
"7529",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,"Reddy","B B","","",,,,,"Reddy","B B","","",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,