Corn stalks can hold a lot of moisture, and a field that looks dry can have a higher moisture content than it appears. Cattle do get moisture from grazing, but as forages mature, moisture content and forage intake will decline. Nitrate levels in forages can be compounded by nitrate levels in livestock water. Corn stalks can hold a lot of moisture, and a field that looks dry can have a higher moisture content than you might think. If moisture levels have dropped below 65%, water can be added to raise the moisture content, but it is usually not practical.