"1804","8","archive","14",,,"disk0/00/00/18/04","2011-09-21 06:42:58","2011-09-21 06:42:58","2011-09-21 06:42:58","article",,,"show","Library-ICRISAT@cgiar.org",,,"","","","","","","","","","","0",,,"Sahrawat","K L","","","","","","","Sahrawat","K L","","","","",,,,,"","",,,,,"","","ICRISAT(Patancheru)","India","Assessing the Fertilizer Phosphorus Requirement of Grain Sorghum","pub","s1.4","","","restricted",,,,,,"Two methods were evaluated for determining the fertilizer phosphorus requirements (FPR) of sorghum grown on a Vertisol under rainfed conditions. The first method was based on P on applied P uptake, and grain yield relationships for grain sorghum. In this method, P uptake at a given yield was determined from the relationship between total P uptake and grain yield. The amount of fertilizer P applied for the given P uptake and grain yield was then, determined from the relationship between P applied and P uptake. In the second method, FPR was determined using the equation: FPR=(Up-U0)/PRF, where Up is P uptake at a given yield, U0 is P uptake from unfertilized soil, and PRF is the recovery of applied P. The parameters, U0, Up, and PRF were determined in a field experiment in India. There was a good agreement between the observed value of FPR and predicted values determined by the two methods. These results suggest that the simple models based on P uptake can be utilized for determining the fertilizer requirements of crops.","1999",,,"Communications in Soil Science and Plant Analysis","30","11/12",,,"1593-1601",,,,,,,,,,,"TRUE",,,,,,,,"","http://dx.doi.org/10.1080/00103629909370311","http://scholar.google.co.in/scholar?as_q=Assessing+the+Fertilizer+Phosphorus+Requirement+of+Grain+Sorghum&num=10&btnG=Search+Scholar&as_epq=&as_oq=&as_eq=&as_occt=title&as_sauthors=&as_publication=&as_ylo=&as_yhi=&as_sdt=1.&as_sdtp=on&as_sdtf=&as_sdts=5&h","",,"","",,,,,,"",,,,,,,"",,,,,"",,,,,"","",,,,,"","",,,,,