Show simple item record

dc.contributorGerakis, Argyriosen_US
dc.contributorRitchie, Joe T.en_US
dc.contributorK. Friesen, Dennisen_US
dc.contributorRyan, Johnen_US
dc.creatorDaroub, Samira H.en_US
dc.identifier.citationSamira H. Daroub, Argyrios Gerakis, Joe T. Ritchie, Dennis K. Friesen, John Ryan. (1/6/2003). Development of a soil-plant phosphorus simulation model for calcareous and weathered tropical soils. Agricultural Systems, 76 (3), pp. 1157-1181.en_US
dc.description.abstractPhosphorus (P) is a limiting nutrient affecting crop yields in many regions of the world, in particular in areas with highly weathered acid soils and calcareous alkaline soils. Given the many factors associated with P behavior in a range of soil environments, there is a need to go beyond site-specific situations. The use of crop simulation models is a valuable tool to evaluate the efficacy of applying P fertilizers under different soil, management and climatic conditions. A computer model was developed to simulate P in the soil–plant system adapted to soils with high P limitations. The soil P module is operated with two comprehensive crop simulation models (CERES and CROPGRO) within the DSSAT software. The P module comprises inorganic and organic P pools estimated from measured P fractionation data and works on a daily time step. The rate constants for P movement between the pools follow first order kinetics. The P module was calibrated and tested using three data sets from Colombia, Syria, and Tanzania. The limited testing showed that the P module simulated accurately grain yield and P uptake by wheat grown under semi-arid conditions. The wheat crop responded little to fertilization although measured Olsen P was as low as 2.6 mg kg−1. The P module overestimated P uptake for both soybean and bean crops grown in acidic soils, but predicted with a good degree of accuracy labile P in the soil and P uptake for maize grown under the same acidic conditions. Testing with more data sets is needed to improve model predictions.en_US
dc.rightsCopyrighted; all rights reserveden_US
dc.sourceAgricultural Systems;76,(2003) Pagination 1157,1181en_US
dc.subjectcrop simulation modelsen_US
dc.subjectcrop modelsen_US
dc.subjectsoil modelsen_US
dc.subjecttropical acid soilsen_US
dc.subjectsemi-arid soilsen_US
dc.subjectphosphorus simulationen_US
dc.subjectphosphorus availability in acid tropical soilsen_US
dc.subjectphosphorus availability in alkaline semi-arid soilsen_US
dc.titleDevelopment of a soil-plant phosphorus simulation model for calcareous and weathered tropical soilsen_US
dc.typeJournal Articleen_US
cg.contributor.centerMichigan State University - MSUen_US
cg.contributor.centerInternational Maize and Wheat Improvement Center - CIMMYTen_US
cg.contributor.centerInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.contributor.funderInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.contributor.projectCommunication and Documentation Information Services (CODIS)en_US
cg.contributor.project-lead-instituteInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
dc.identifier.statusTimeless limited accessen_US

Files in this item


There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record

DSpace software copyright © 2002-2016  DuraSpace
MELSpace content providers and partners accept no liability to any consequence resulting from use of the content or data made available in this repository. Users of this content assume full responsibility for compliance with all relevant national or international regulations and legislation.
Theme by 
Atmire NV