Yields to Expect A certain fertilizer application cannot be expected to produce a specific yield such as two bales of cotton or nine tons of hay. It is more realistic to assume that a balanced fertilizer program assures that nutrients are not the limiting factor in yields obtained. Research has shown that producers who use a balanced fertilizer program obtain consistently better yields than those who don't. After the soil is analyzed, fertility recommendations are made based on amounts of actual nutrients in the soil, not on the amount of any particular fertilizer or mixture. Phosphorus exists most commonly as monocalcium phosphate, but also occurs as other calcium or ammonium phosphates.
Potassium is ordinarily in the form of potassium chloride or sulfate.
Conversions from one form of P and K to another can be made using the following formulas. The fertility status is reported as nutrients available to the plant. The second part, fertility recommendation, contains the suggested amounts of fertilizer to apply. Special notification is given if the tests indicate that a salt or sodium hazard exists or if the information provided shows any other specific problems. Soil amendments or treatments to reduce a sodium or salt hazard will be recommended if requested.