Critical Plant Nutrient Levels

To make sure the calculation is correct click outside of any text box after changing a selection field

Select the type of plant: Corn Soybeans

Area of plant to be tested:

Select the nutrient you would like the critical nutrient level for: Nitrogen Phosphorus Potassium Calcium Magnesium Sulfur Zinc Iron Manganese Copper Boron

The suggested critical level of in is