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United States Department of Agriculture

Agricultural Research Service

Research Project: Biologically Based Fertilizer Recommendations to Meet Yield Expectations and Preserve Water Quality

Location: Sustainable Agricultural Systems Laboratory

Project Number: 1245-21660-004-21
Project Type: Interagency Reimbursable Agreement

Start Date: Oct 01, 2013
End Date: Aug 31, 2017

Objective:
Develop a practical decision support system for nitrogen (N) fertilizer recommendations in the Chesapeake Bay Watershed based on potential soil biological activity and quality of organic matter and amendments.

Approach:
Using a targeted approach, ARS will (1) evaluate N uptake from soils with a wide diversity of soil organic matter conditions in lab and greenhouse experiments and (2) evaluate crop yield responses to soil conditions and N fertilizer based on combined knowledge of pre-season N test with the flush of CO2 test and residual soil-profile nitrate and in-season determination of N sufficiency with the pre-sidedress N test. Multiple field locations will be identified throughout the Chesapeake Bay region for evaluation.

Last Modified: 10/1/2014
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