Page Banner

United States Department of Agriculture

Agricultural Research Service

Research Project: Improving Nutrient Utilization in Western Irrigated Crop Production Systems

Location: Northwest Irrigation and Soils Research

Title: Using extension phosphorus uptake research to improve Idaho's nutrient management planning program)

Author
item Hines, Steven
item Moore, Amber
item Brown, Brad
item Chahine, Mireille
item Norell, Rick
item De Haro Marti, Mario
item Falen, Christi
item Fife, Tianna
item Parkinson, Stuart
item Ippolito, James

Submitted to: Journal of Extension
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 2/23/2012
Publication Date: 10/29/2012
Citation: Hines, S., Moore, A., Brown, B., Chahine, M., Norell, R., De Haro Marti, M.E., Falen, C., Fife, T., Parkinson, S., Ippolito, J.A. 2012. Using extension phosphorus uptake research to improve Idaho's nutrient management planning program. Journal of Extension. 50(5):Article 5RIB10. Available: http://www/joe/org/joe/2012october/rb10.php.

Interpretive Summary: Irrigated silage corn is the main crop used for phosphorus removal; however little is known about the actual amounts of phosphorus removed under southern Idaho growing conditions. The purpose of this study was to survey phosphorus removal by irrigated corn grown for silage in southern Idaho under variable soil test phosphorus concentrations. In this survey whole plant corn tissue phosphorus concentrations ranged from 0.116 to 0.307% total phosphorus and averaged 0.208%, which is lower than Natural Resources Conservation Services estimates used prior to 2007 (0.26% phosphorus) but higher than estimates used since 2007 (0.185%). The study was used by NRCS to update nutrient management planning software used by planners in Idaho.

Technical Abstract: Irrigated silage corn is the main crop used for phosphorus removal; however little is known about the actual amounts of phosphorus removed under southern Idaho growing conditions. The purpose of this study was to survey phosphorus removal by irrigated corn grown for silage in southern Idaho under variable soil test phosphorus concentrations. In this survey whole plant corn tissue phosphorus concentrations ranged from 0.116 to 0.307% total phosphorus and averaged 0.208%, which is lower than Natural Resources Conservation Services estimates used prior to 2007 (0.26% phosphorus) but higher than estimates used since 2007 (0.185%). The study was used by NRCS to update nutrient management planning software used by planners in Idaho.

Last Modified: 8/24/2016
Footer Content Back to Top of Page