'N fertilizer' diaporamas de présentation

Soil organic matter in the Rothamsted plots

490 views • 27 slides

Funding for this work has been provided by the U.S. Environmental Protection Agency, the U.S. Department of Agriculture

Biofuels and Water Quality in the Midwest: Corn vs. Switchgrass Silvia Secchi, Philip W. Gassman, Manoj Jha, Lyubov Kurkalova, and Catherine L. Kling Center for Agricultural and Rural Development Iowa State University March 2008.

325 views • 23 slides

Development of Safflower as a New Winter Crop for the Texas High Plains

Development of Safflower as a New Winter Crop for the Texas High Plains. Dick Auld Calvin Trostle Plant & Soil Sciences Extension Agronomist Texas Tech Univ., Lubbock Texas AgriLife Extension Service 806.742.5704, dick.auld@ttu.edu 806.746.6101, ctrostle@ag.tamu.edu.

398 views • 21 slides

252 views • 17 slides

The Bremner Contribution to Controlling Nitrogen Transformations in Soils

The Bremner Contribution to Controlling Nitrogen Transformations in Soils. Larry G. Bundy University of Wisconsin. Issues Driving Research. Concern about nitrate-N enrichment of natural waters Emergence of urea as a major N fertilizer material

326 views • 15 slides

Production Economics Tools for Farm Management

Production Economics Tools for Farm Management. AAE 320 Paul D. Mitchell. Learning Goal. Many tools for farmers exist, review some of them to Show how they work Show that the production economics principles we learned underlies them

272 views • 9 slides