Report of James Higgins , M. D., State Agricultural Chemist, to the House of Delegates of Maryland 1849
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the greatest degree of feitility, has not been ascertaii\ed. When- ever the analysis of soils shows a less quantity than (.05) five one ^yhundredths of one per cent of iron and alumina as phosphates, (for in this, for valid reasons, I have always estimated it,) phos- phates may be advantageously supplied. The only indication for their use is their absence or deficiency.
SOURCES OF PHOSPHORIC ACID.
The chief sources of the supply of phosphoric acid are from bones and guano. Ashes, both leached a...nd ufileached, also con- tain them in large quantities, and to this much of their beneficial aciion maybe frequently ascribed.
Bone dust contains about fifty per cent of phosphate of lime and magnesia. I mean, now, bone dust, such as is ground from bones, as they are used for manure without any especial washing.
Besides this, they, by the decomposition of the animal matter in them, afford ammonia. In this manner, they have a two fold ac- tion on crops : — 1st. By supplying them with ammonia ; — 2nd.
What to read after Report of James Higgins , M. D., State Agricultural Chemist, to the House of Delegates of Maryland 1849?
You can find similar books in the "Read Also" column, or choose other free books by Maryland. State Agricultural Chemist to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
the greatest degree of feitility, has not been ascertaii\ed. When- ever the analysis of soils shows a less quantity than (.05) five one ^yhundredths of one per cent of iron and alumina as phosphates, (for in this, for valid reasons, I have always estimated it,) phos- phates may be advantageously supplied. The only indication for their use is their absence or deficiency.
SOURCES OF PHOSPHORIC ACID.
The chief sources of the supply of phosphoric acid are from bones and guano. Ashes, both leached a...nd ufileached, also con- tain them in large quantities, and to this much of their beneficial aciion maybe frequently ascribed.
Bone dust contains about fifty per cent of phosphate of lime and magnesia. I mean, now, bone dust, such as is ground from bones, as they are used for manure without any especial washing.
Besides this, they, by the decomposition of the animal matter in them, afford ammonia. In this manner, they have a two fold ac- tion on crops : — 1st. By supplying them with ammonia ; — 2nd.
What to read after Report of James Higgins , M. D., State Agricultural Chemist, to the House of Delegates of Maryland 1849?
You can find similar books in the "Read Also" column, or choose other free books by Maryland. State Agricultural Chemist to read onlineMoreLess
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