Practical Farm Chemistry : a Handbook of Profitable Crop Feeding
Practical Farm Chemistry : a Handbook of Profitable Crop Feeding
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It must be of interest to examine its structure and general constitution, even before en- tering the question of the food elements which are contained in it.
All soils have more or less organic matter de- rived from the decay of animal, and still more of vegetable, substances. The proportion of such or- ganic matter in naturally productive soils varies between a mere fraction of one, and seventy per cent of its entire weight. In our best soils the organic matter ranges from five to twelve per c...ent, seldom more. Only in mucky and peaty soils does the amount of organic matter ever exceed that of the inorganic or earthy matter.
The inorganic or earthy part of the soil consists principally of silica or silicious sand, alumina (as 56 PBACTIOAL FARM CHEMISTRY.
clay or slate), and lime (as carbonate or chalk). Clay,.
or pure clay, as seen from the far- "'T/toUs."" ^^^'^ standpoint, is a compound of about forty per cen j of alumina — a metalic earth, the oxide of the metpJ aluminum — and about sixty per cent of silica or sand.
What to read after Practical Farm Chemistry : a Handbook of Profitable Crop Feeding?
You can find similar books in the "Read Also" column, or choose other free books by Greiner, Tuisco, 1846- to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
It must be of interest to examine its structure and general constitution, even before en- tering the question of the food elements which are contained in it.
All soils have more or less organic matter de- rived from the decay of animal, and still more of vegetable, substances. The proportion of such or- ganic matter in naturally productive soils varies between a mere fraction of one, and seventy per cent of its entire weight. In our best soils the organic matter ranges from five to twelve per c...ent, seldom more. Only in mucky and peaty soils does the amount of organic matter ever exceed that of the inorganic or earthy matter.
The inorganic or earthy part of the soil consists principally of silica or silicious sand, alumina (as 56 PBACTIOAL FARM CHEMISTRY.
clay or slate), and lime (as carbonate or chalk). Clay,.
or pure clay, as seen from the far- "'T/toUs."" ^^^'^ standpoint, is a compound of about forty per cen j of alumina — a metalic earth, the oxide of the metpJ aluminum — and about sixty per cent of silica or sand.
What to read after Practical Farm Chemistry : a Handbook of Profitable Crop Feeding?
You can find similar books in the "Read Also" column, or choose other free books by Greiner, Tuisco, 1846- to read onlineMoreLess
Read book Practical Farm Chemistry : a Handbook of Profitable Crop Feeding for free
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