Results of Experiments At Rothamsted the Growth of Leguminous Crops for Many Y
Results of Experiments At Rothamsted the Growth of Leguminous Crops for Many Y
Joseph Henry Gilbert
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, over the last 5 years 117 Ibs. , and over the whole period of 35 years 163 Ibs. ; whilst, as the details show, the ON THE GROWTH OF LEGUMINOUS CROPS. 23 yield in the 31st year (1884) was about 240 Ibs. , and in the 32nd year 156 Ibs. Of nitrogen. Further, the average over the third 10 years of the continuous growth (122 Ibs. ), was about as much as in a fair average crop grown occasionally under the ordinary conditions of agriculture. There would seem, then, to be clearly indicated, a soil so...urce of failure on the arable-land, and a soil source of success on the garden- soil. The results given in Table X. (below) will throw some further light on this point. It shows the percentage of nitrogen in the first 9 inches of depth of the garden-soil, in 1857 and in 1879, between which periods the growth of 21 years had been removed. It also shows the estimated amounts of nitrogen per acre in the surface soil at the two periods, and the reduction in the amount during the 21 years. TABLE X. RED CLOVER.
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