Â© 2018 - Saint Paul Lutheran Church Proudly powered by WordPress Weaver II by WP Weaver
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.
Nitrogen credits given for soybeans and alfalfa are similar to the reported values for N remaining in plant residue (table 2): 40 lbN/acre for soybeans and 104 lbN/acre following three years of alfalfa. The total N credit for a legume crop, however, cannot be totally attributed to N remaining in residue.