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APLE

APLE is a Microsoft Excel spreadsheet model that runs on an annual time step and simulates sediment bound and dissolved P loss in surface runoff.  It is intended to simulate edge-of-field P loss for uniform fields of several hectares in size, or smaller.  APLE considers different kinds of animal manure (beef, dairy, poultry, swine), applied either by machine or by grazing beef or dairy cattle, and highly soluble commercial fertilizers.
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Rumen Microbiology Textbook

We are pleased to make available, in PDF format, Dr. James B. Russell's classic textbook, "Rumen Microbiology and Its Role in Ruminant Nutrition", originally published in 2002.
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APLE-Lots

This version of the Annual Phosphorus Loss Estimator is a spreadsheet model that simulates dissolved and sediment-bound phosphorus loss from outdoor cattle lots.
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