eprintid: 1804
rev_number: 8
eprint_status: archive
userid: 14
dir: disk0/00/00/18/04
datestamp: 2011-09-21 06:42:58
lastmod: 2011-09-21 06:42:58
status_changed: 2011-09-21 06:42:58
type: article
metadata_visibility: show
contact_email: Library-ICRISAT@cgiar.org
item_issues_count: 0
creators_name: Sahrawat, K L
icrisatcreators_name: Sahrawat, K L
affiliation: ICRISAT(Patancheru)
country: India
title: Assessing the Fertilizer Phosphorus Requirement of Grain Sorghum
ispublished: pub
subjects: s1.4
full_text_status: restricted
abstract: 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.
date: 1999
publication: Communications in Soil Science and Plant Analysis
volume: 30
number: 11/12
pagerange: 1593-1601
refereed: TRUE
official_url: http://dx.doi.org/10.1080/00103629909370311
related_url_url: 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
citation:   Sahrawat, K L  (1999) Assessing the Fertilizer Phosphorus Requirement of Grain Sorghum.  Communications in Soil Science and Plant Analysis, 30 (11/12).  pp. 1593-1601.      
document_url: http://oar.icrisat.org/1804/1/ComSocSciPlantAnal30_11-12_1593-1601_1999.pdf