Formulas for converting methods of reporting nitrates. The effects of feed and water levels are additive. Consider both in avoiding or assessing nitrate problems. Common causes of high nitrate levels in water include shallow wells contaminated with surface water, water containing animal wastes, and surface runoff from heavy rain after fertilization with ammonium nitrate. NO 3 is potentially toxic, especially when feed also contains an excessive level.
Laboratories report nitrate content of feed and water in different forms.
Consider the form for expressing nitrate levels to avoid errors in determining the potential for toxicity. Table 2 should aid in interpreting laboratory results. Equivalent levels of nitrate. Nitrate is converted to nitrite in the rumen. Nitrite is absorbed from the rumen and converts blood hemoglobin to methemoglobin.