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Figure 3. A multi-year Purdue study found that the highest alfalfa yields were recorded when fertilizer rates were 50 pounds of P 2 O 5 per acre per year, and 200 pounds or more of K 2 O per acre per year.igure 3. A multi-year Purdue study found that the highest alfalfa yields were recorded when fertilizer rates were 50 pounds of P 2 O 5 per acre per year, and 200 pounds or more of K 2 O per acre per year.
Alfalfa can be used in many ways. Alfalfa meal can be worked into the soil around rose bushes. Normally one cupful per large rose bush and about one-half cup for miniatures is recommended. Alfalfa meal is also contained in many commercial organic products (e.g. Mills Magic Mix) because of its beneficial components.