TEST SOIL FOR FALL PLANTINGS

Sites with soil pH values greater than 6.5 and P and K sufficiency levels near 100% are preferred for alfalfa production since pre-plant preparation costs will be less at these sites than at sites needing lime or fertilizer applications. The only way to obtain this information is through soil testing. Results from soil tests are most useful when farmers follow a regular program of testing in all of their fields.   

As a general rule of thumb, fields should be tested every three years. Alfalfa is sensitive to acidity and also removes large quantities of nutrients from the soil. Adhering to a regular soil testing schedule allows one to monitor changes in pH and nutrient status and make adjustments in fertilizer and lime needs throughout the life of the stand.   

If plans are being made to establish alfalfa this fall following a wheat crop, a soil test should be done as soon as wheat is harvested. The earlier the soil is sampled before sowing the alfalfa, the more time there will be for any needed lime applications to react in the soil and improve chances for good establishment.