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APLE : Annual Phosphorus Loss Estimator Tool

Published by Agricultural Research Service | Department of Agriculture | Catalog Last Checked: May 05, 2026 at 11:42 PM | Dataset Last Updated: November 22, 2025
APLE is a Microsoft Excel spreadsheet model that runs on an annual time-step and estimates field-scale, sediment bound and dissolved P loss (kg ha−1) in surface runoff for agricultural field. APLE is intended to quantify P loss through process-based equations. It has been tested for its ability to reliably predict P loss in runoff for systems with machine-applied manure and for soil P cycling using data from a wide variety of agricultural fields and regions. Resources in this dataset:Resource Title: Annual P Loss Estimator (APLE). File Name: APLE 2.5.2.xlsxResource Description: APLE is a fairly simple, user-friendly, Microsoft Excel spreadsheet model that runs on an annual time-step and estimates field-scale, sediment bound and dissolved P loss (kg ha−1) in surface runoff for agricultural field. To download the spreadsheet, fill out the form at https://www.ars.usda.gov/research/software/download/?softwareid=304 Resource Title: Annual Phosphorus Loss Estimator User’s Manual Version 2.4. File Name: APLEUsersManual24.pdf

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