. Economics of forage production in the mountain meadow areas of Colorado : a progress report . 80 160 240 LB. OF AVAILABLE NITROGEN APPLIED 320 U, S. DEPARTMENT OF AGRICULTURE NEC. 59(3)-2654 AGRICULTURAL RESEARCH SERVICE Figure 6. Estimated nitrogen response curves showing relationship between rate of application of nitrogen fertilizer and yield of hay under selected conditions. (fig. 6) shows that after the first 38 pounds of nitrogen have been applied, an additional application of 32 pounds increases the yield by 0. 25 tons. In this instance, the theoretical most profitable rate is halfway
. Economics of forage production in the mountain meadow areas of Colorado : a progress report . 80 160 240 LB. OF AVAILABLE NITROGEN APPLIED 320 U, S. DEPARTMENT OF AGRICULTURE NEC. 59(3)-2654 AGRICULTURAL RESEARCH SERVICE Figure 6. Estimated nitrogen response curves showing relationship between rate of application of nitrogen fertilizer and yield of hay under selected conditions. (fig. 6) shows that after the first 38 pounds of nitrogen have been applied, an additional application of 32 pounds increases the yield by 0. 25 tons. In this instance, the theoretical most profitable rate is halfway between 38 and 70 pounds of nitrogen, or 54 pounds, 15/ and the theoretical production per acre is tons. This method is used also in determining the most profitable rate of nitrogen application based on curve "B", but a different answer is obtained because of the difference in the nature of the meadow's response to nitrogen. In this instance, increasing the application of fertilizer from 60 to 92 pounds (32 pounds) increased production per acre from 2. 30 to 2. 55 tons per acre, or 0. 25 ton. Therefore, the most profitable rate is 76 pounds per acre (halfway between 60 and 92 pounds). 15/ See pages 50 and 51 for explanation.
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