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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.
Fertilizer requirements for pearl millet are similar to those for grain sorghum. Apply 80 to 100 pounds of nitrogen per acre in soils with a clay pan (Table 2). In deep soils, pearl millet can respond to applications of 100 to 140 pounds of nitrogen per acre. Apply fertilizer at planting and the remaining about 3 to 4 weeks after planting.