alexa A Simplified Soil and Plant Phosphorus Model: I. Documentation
Agri and Aquaculture

Agri and Aquaculture

Journal of Fertilizers & Pesticides

Author(s): C A Jones, C V Cole, A N Sharpley, J R Williams

Abstract Share this page

The structure of a simple soil and plant P model designed for use in the Erosion-Productivity Impact Calculator (EPIC) agriculture management model is described. The model maintains pools of stable, active, and labile inorganic P; fresh organic and stable organic P; and grain, stover and root P. The model has a daily time step, simulates P uptake and transformations in up to ten soil layers of variable thickness, and is sensitive to soil chemical and physical properties, crop P requirements, tillage practice, fertilizer rate, soil temperature, and soil water content. Fertilizer P is added to the labile inorganic P pool which is in rapid equilibrium with the active inorganic P pool. The relative sizes of the labile and active inorganic pools are soil specific and are based on soil classification, texture, and chemical properties. Movement of active inorganic P to the stable inorganic P pool simulates slow adsorption of inorganic P. Crop P uptake from a soil layer is sensitive to crop P demand and the amounts of labile P, soil water, and roots in the layer. Stover and root P are added to the fresh organic P pool upon their death and/or incorporation into the soil. Decomposition of fresh and stable organic matter may result in net immobilization of labile P or net mineralization of organic P.

This article was published in Soil Science Society of America Journal and referenced in Journal of Fertilizers & Pesticides

Relevant Expert PPTs

Relevant Speaker PPTs

Recommended Conferences

Peer Reviewed Journals
 
Make the best use of Scientific Research and information from our 700 + peer reviewed, Open Access Journals
International Conferences 2017-18
 
Meet Inspiring Speakers and Experts at our 3000+ Global Annual Meetings

Contact Us

 
© 2008-2017 OMICS International - Open Access Publisher. Best viewed in Mozilla Firefox | Google Chrome | Above IE 7.0 version
adwords