Report
Lime requirement estimates for the Inland Northwest: a guide to the updated calculator
Washington State University Extension fact sheet, 398E, Washington State University Extension
06/2025
DOI:
https://doi.org/10.7273/000007344
Abstract
Buffer testing is a method of soil analysis that can be used to derive an estimation of how much liming material is required to ameliorate acidified soils. Buffer testing accounts for the acidity present and the unique buffering capacity of the soil tested. Properly estimating the lime requirement is foundational for developing a lime program to neutralize soil acidity. This publication aims to provide more information on the methods and underlying principles of each approach used to determine lime requirement estimates (LRE) for acidified soils in the inland Pacific Northwest (iPNW). This publication includes a detailed outline of the parameters used in the updated Lime Requirement Calculator (https://smallgrains.wsu.edu/lime-requirementcalculator/) developed by the Washington State University Extension Dryland Cropping Systems Team and available on the Wheat and Small Grains website (https://smallgrains.wsu.edu/soil-and-water-resources/soils-tools-calculators/). A companion to Washington State University Extension’s Soil Acidification Series (https://pubs.extension.wsu.edu/search?q=Soil+Acidification+Series) publications Agricultural Lime and Liming part one and part three (Thompson et al. 2016a, 2016b), this publication reflects the latest information regarding lime requirement estimates and updated recommendations based on ongoing research for the region.
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Details
- Title
- Lime requirement estimates for the Inland Northwest
- Creators
- Joao Antonangelo (Author) - Washington State University, Department of Crop and Soil SciencesRachel Amber Wieme (Author) - Washington State University, WSU Extension ANRCarol McFarland (Author) - Washington State University, Department of Plant Pathology
- Academic Unit
- Publications, WSU Extension
- Series
- Washington State University Extension fact sheet; 398E
- Publisher
- Washington State University Extension; Pullman, Washington
- Number of pages
- 6
- Identifiers
- 99901225550801842
- Language
- English
- Resource Type
- Report