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Utah State University Extension

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Manure and wastewater are resources that can reduce your fertilizer needs and help improve soil and your bottom line. It is important that manure and wastewater be sampled and tested so one can apply the manure and nutrients appropriately. Sampling and analysis should occur as close to land application as possible as nutrient concentration in manure and wastewater can change over time due to runoff, leaching, and changes in moisture percentage. Nitrogen can also be lost due to volatilization. There are two primary approaches for when to sample: (1) just before land application, and (2) at the time of land application. Guidelines for how to sample solid manure, liquid manure, and slurries are provided in this document.

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