The Alleged Deterioration of Local Superphospate
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For example, comparatively poor sand-plain land contains as much phosphoric acid as is re- quired by several crops of wheat, each of twenty bushels, but on the other hand, the amount which is available is often not sufficient to produce one of six bushels. Even the richer forest land has often not more availa))le phosphoric acid than is needed to produce 12 bushels.
Abrolhos guano and superphosphate resemble each other, in that each contains the plant food known as phosphoric acid, and in conse...quence both are phospliatic manures. They are, however, dissimilar, in that the bulk of the phosphoric acid in the superphosphate is in a form which the young plants can readil^f make use of at once, whereas the bulk of the phos- phoric acid in Abrolhos guano is in a form similar to tiiat already in the soil, and which cannot be used by the plants until made available by the process of time. To add Abrolhos guano to the soil is therefore to increase the total quantity of phosphoric acid in the soil, but not to immediately increase the amount available for the use of the plant, and in conse- quence the object of manuring is not being achieved.
What to read after The Alleged Deterioration of Local Superphospate?
You can find similar books in the "Read Also" column, or choose other free books by Sutton, George L to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
For example, comparatively poor sand-plain land contains as much phosphoric acid as is re- quired by several crops of wheat, each of twenty bushels, but on the other hand, the amount which is available is often not sufficient to produce one of six bushels. Even the richer forest land has often not more availa))le phosphoric acid than is needed to produce 12 bushels.
Abrolhos guano and superphosphate resemble each other, in that each contains the plant food known as phosphoric acid, and in conse...quence both are phospliatic manures. They are, however, dissimilar, in that the bulk of the phosphoric acid in the superphosphate is in a form which the young plants can readil^f make use of at once, whereas the bulk of the phos- phoric acid in Abrolhos guano is in a form similar to tiiat already in the soil, and which cannot be used by the plants until made available by the process of time. To add Abrolhos guano to the soil is therefore to increase the total quantity of phosphoric acid in the soil, but not to immediately increase the amount available for the use of the plant, and in conse- quence the object of manuring is not being achieved.
What to read after The Alleged Deterioration of Local Superphospate?
You can find similar books in the "Read Also" column, or choose other free books by Sutton, George L to read onlineMoreLess
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