. The Bulletin of the North Carolina Department of Agriculture. Agriculture -- North Carolina. 58 The Bulletin. sandy or open, porous soil, because of its easy solubility in water, and of its givin^s; out before a long-seasoned crop has made its growth, thus leaving the crop without a supply of nitrogen before the end of the growing season. Its use is most strongly advocated for short-season crops, as in early truck and vegetable growing and as a top dressing for grain and for corn and cotton after growth is well advanced, or for any crop when seen to be in need of a quickly- acting nitrogen-s
. The Bulletin of the North Carolina Department of Agriculture. Agriculture -- North Carolina. 58 The Bulletin. sandy or open, porous soil, because of its easy solubility in water, and of its givin^s; out before a long-seasoned crop has made its growth, thus leaving the crop without a supply of nitrogen before the end of the growing season. Its use is most strongly advocated for short-season crops, as in early truck and vegetable growing and as a top dressing for grain and for corn and cotton after growth is well advanced, or for any crop when seen to be in need of a quickly- acting nitrogen-supplying material. Dried blood, whicli is a fair representative of the animal and vegetable nuiterials furnishing nitrogen, as cotton-seed meal, tank- age, etc., is not soluble in water and acts more slowly and for a longer time. It must be changed by rotting or decomposing in the soil into nitrate before it can feed the crop, and is thus likely to be effective throughout a reasonable growing season. It has become a practice in growing many crops to apply only a part of the nitrogen at the time of planting and a portion later, usually as nitrate of soda, so as to keep the crop growing as rapidly as possible. The experiments in Table VI were planned with a view of throwing as much light as possible on these questions of nitrogen fertilization in corn growing. In the tests all of the phosphoric acid and potash were applied in the drill before planting. On two plats (11^ and 5") one-half the nitrogen was supplied as dried blood and was ap])lied with the phosphoric acid and potash before planting, the other half of the nitrogen being supi)lied as nitrate of soda and was applied about July first. On two other plats (12^ and C") all of the nitrogen was supplied by nitrate of soda, one-half being applied before planting with the phosphoric acid and potash, and the other TABLE VII—RESULTS OF FERTILIZER EXPERIMENTS WITH CORN ON OF A PPL PEsri-TS ijn field b. (5^142) 10» Unf
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