Abstract
Abstract A single comprehensive nitrogen method applicable to all fertilizers and to all forms of fertilizer nitrogen has been developed. The method utilizes untreated chromium metal powder in an acid medium to reduce nitrates. It quantitatively reduced nitrates alone, nitrates in the presence of organic matter, and nitrates in samples with high C1"/N03_ratios. Quantitative results were obtained with both solid and liquid fertilizer samples and with highly refractory organic samples. When subjected to the ruggedness test of Youden the method was "rugged."
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