. Complete farmer's guide. Agriculture; Farm life. [from old catalog]. 108 FUNDAMENTALS OF FARMING seeds are, however, much richer in the needed food materials. Figure 64 shows you the large amounts of nitrogen, phos- phoric acid, and potash taken away in the seeds. The plant- food materials in the stalks of a hundred-bushel corn crop after the grain is harvested would cost, as fertilizer, over eighteen. Fig. 65. On the left no manure or fertilizer used and no com produced. On the right 15 tons of horse manure used with yield of 65 bushels per acre. dollars. The plant-food materials in the stu
. Complete farmer's guide. Agriculture; Farm life. [from old catalog]. 108 FUNDAMENTALS OF FARMING seeds are, however, much richer in the needed food materials. Figure 64 shows you the large amounts of nitrogen, phos- phoric acid, and potash taken away in the seeds. The plant- food materials in the stalks of a hundred-bushel corn crop after the grain is harvested would cost, as fertilizer, over eighteen. Fig. 65. On the left no manure or fertilizer used and no com produced. On the right 15 tons of horse manure used with yield of 65 bushels per acre. dollars. The plant-food materials in the stubble and straw of a thirty-five-bushel crop of oats are worth over thirteen dollars. The facts are similar in the cases of other crops. This shows how very important it is to turn back under the soil all stubble and stalks before they lose a great part of their value by decay and by giving off nitrogen into the air. In addition to the plant-food materials added directly by the turned-under vegetation, we have already seen that by en- couraging the growth of bacteria, and through other effects on the soil, the humus adds perhaps even more to the avail- able supply of food materials indirectly than it does Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Kyle, Edwin Jackson. [from old catalog]; Ellis, Alexander Caswell, 1871- [from old catalog] joint author. New York, Chicago [etc. ] C. Scribner's sons
Size: 2068px × 1208px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectagriculture, bookyear
