How Crops Feed: A Treatise on the Atmosphere and the Soil as Related to the Nutrition of Agricultural PlantsOrange Judd, 1896 - 359 páginas |
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Términos y frases comunes
absorbed absorption acre alkali alumina ammonia amount assimilable atmosphere beans bodies Boussingault carbonate of lime carbonic acid cent charcoal chemical chloride clay color combination composition compounds crenic crops cubic decay decomposed decomposition dilute dissolved earth exhaled exist experiments fact feldspar fertility foliage formed free nitrogen garden soil gases glass grains grams grms heat hippuric acid humates humic acid humus hydrogen hygroscopic hygroscopic water inches ingredients insoluble kaolinite Knop liquid magnesia manured mineral mixture moist Mulder nearly nitrate of potash nitric acid nitrogen nitrous observed organic matters oxidation oxide of iron oxygen ozone particles peat phosphate phosphoric acid plants porous portion proportion protoxide pure quantity quartz rain rocks roots salts sand saturated Saussure seeds sesquioxide silicates soda soil soil contained soluble solution substances sulphate sulphuric acid supply surface temperature tion ulmic acid urea urine vapor vegetation vessel washed weight yield zeolites
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Página 375 - ... of absolute, but of relative insolubility, and are kept available to the plant by the continual circulation in the soil of the more abundant saline matters. The soil (speaking in the widest sense) is then not only the ultimate exhaustless source of mineral (fixed) food, to vegetation, but it is the storehouse and conservatory of this food, protecting its own resources from waste and from too rapid use, and converting the highly soluble matters of animal exuviae as well as of artificial refuse...
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