Following best practices during sample collection and analysis will produce data of known and defensible quality. This protocol details the best practices for the collection of water samples from croplands and for the following water quality protocols: USDA LTAR Common Experiment measurement: Dissolved nitrate (NO3-) concentration USDA LTAR Common Experiment measurement: Dissolved ammonia (NH3) concentration USDA LTAR Common Experiment measurement: Total nitrogen (TN) and total dissolved nitrogen (TDN) concentration USDA LTAR Common Experiment measurement: Total phosphorus (TP) and total dissolved phosphorus (TDP) concentration USDA LTAR Common Experiment measurement: Total suspended solids (TSS)
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Oliva Pisani (2024) studied this question.
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