How long should I wait before grazing after fertilizer or herbicide application?
Fertilizers – To determine the waiting period after fertilizer application before harvesting or grazing, you need to consider: • rainfall or irrigation after fertilizer application, and • growing conditions that occur after fertilizer application. Generally, it is recommended to wait for rainfall or after irrigation to wash fertilizer off the foliage and into the soil, before allowing livestock to graze. Also, if growing conditions are poor (e.g. cool, cloudy, dry conditions) after fertilizer application, there can be accumulation of nitrate in forage, which can be toxic to livestock. In this case, it is important to wait until good growing conditions return to allow the forage plants to convert the nitrate to plant protein. Herbicides – To determine the waiting period after herbicide application before harvesting forage or allowing livestock to graze, it is important to follow directions on the herbicide label. Some herbicides however, do not have information regarding grazing restric
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