The Chemical News And Journal of Industrial Science; With Which is ... 5
The Chemical News And Journal of Industrial Science; With Which is ... 5
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Let us take a case similar to what has repeatedly occurred in actual practice. We have a soil which, as the result of long cultivation or from natural deficiencies, is incapable of yielding a remunerative crop of wheat. Its texture is good, it has produced wheat abundantly, and needs nothing but a little of the right kind of manure to restore its power of giving a crop. We put upon it Peiuvian guano at the rate of 300 lbs. per acre, and the harvest is a good one.
The entire addition to the soil... is but yxHJootto"* 8 = one hundredth per cent.* The amounts* of phosphoric acid, of alkaline earths, and nitrogen added, are, for each, bat but ffjTcth per cent of the soil taken to the depth of a foot. These quantities are rather minute for even the improved analysis of the .present time to estimate suc- cessfully.
Calculations like this show that the chemist cannot discriminate by his analysis between, first, a soil which is unproductive from the temporary exhaustion of some of its available ingredients ; second:, the same soil which is rendered fertile again for a year by the use of 300 lbs.
What to read after The Chemical News And Journal of Industrial Science; With Which is ... 5?
You can find similar books in the "Read Also" column, or choose other free books by William Tooke to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Let us take a case similar to what has repeatedly occurred in actual practice. We have a soil which, as the result of long cultivation or from natural deficiencies, is incapable of yielding a remunerative crop of wheat. Its texture is good, it has produced wheat abundantly, and needs nothing but a little of the right kind of manure to restore its power of giving a crop. We put upon it Peiuvian guano at the rate of 300 lbs. per acre, and the harvest is a good one.
The entire addition to the soil... is but yxHJootto"* 8 = one hundredth per cent.* The amounts* of phosphoric acid, of alkaline earths, and nitrogen added, are, for each, bat but ffjTcth per cent of the soil taken to the depth of a foot. These quantities are rather minute for even the improved analysis of the .present time to estimate suc- cessfully.
Calculations like this show that the chemist cannot discriminate by his analysis between, first, a soil which is unproductive from the temporary exhaustion of some of its available ingredients ; second:, the same soil which is rendered fertile again for a year by the use of 300 lbs.
What to read after The Chemical News And Journal of Industrial Science; With Which is ... 5?
You can find similar books in the "Read Also" column, or choose other free books by William Tooke to read onlineMoreLess
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