First Principles of Soil FertilityKegan Paul, Trench, Trubner, 1910 - 265 páginas |
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... Losses in Manure 137 XIV . Preservation of Manure 150 XV . Applying Manure 165 XVI . Barnyard Manure and the Maintenance of Fertility . XVII . Commercial Fertilizers - Nitrogen XVIII . Potash and Phosphate Fertilizers . XIX . Mixed ...
... Losses in Manure 137 XIV . Preservation of Manure 150 XV . Applying Manure 165 XVI . Barnyard Manure and the Maintenance of Fertility . XVII . Commercial Fertilizers - Nitrogen XVIII . Potash and Phosphate Fertilizers . XIX . Mixed ...
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... unnecessary to deal with the matter considered in the next paragraph . Exhaustion of the Soil . - It is a matter of common experience that continued cropping results in a loss of fertility 6 FIRST PRINCIPLES OF SOIL FERTILITY.
... unnecessary to deal with the matter considered in the next paragraph . Exhaustion of the Soil . - It is a matter of common experience that continued cropping results in a loss of fertility 6 FIRST PRINCIPLES OF SOIL FERTILITY.
Página 7
Alfred Vivian. experience that continued cropping results in a loss of fertility . The experiences of the older sections of our country teach some lessons by which the newer parts may profit . In the beginning the productiveness of the ...
Alfred Vivian. experience that continued cropping results in a loss of fertility . The experiences of the older sections of our country teach some lessons by which the newer parts may profit . In the beginning the productiveness of the ...
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... loss by evaporation from the leaves . It is probable that water performs an important function in controlling the temperature of the plant . The chemical processes in the plant cells produce heat , and the excess of heat is removed by ...
... loss by evaporation from the leaves . It is probable that water performs an important function in controlling the temperature of the plant . The chemical processes in the plant cells produce heat , and the excess of heat is removed by ...
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... loss of nitro- gen . Other experimenters also arrived at the con- clusion that clover has the power of procuring nitrogen from some unknown source . Farmers had known for some time that wheat grown after clover does as well as when ...
... loss of nitro- gen . Other experimenters also arrived at the con- clusion that clover has the power of procuring nitrogen from some unknown source . Farmers had known for some time that wheat grown after clover does as well as when ...
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Términos y frases comunes
acid and potash acre agricultural ammonia amount of nitrogen amount of plant animals applied average bacteria barn barnyard manure bedding carbonic acid clay clover commercial fertilizers complete fertilizers composition compounds condition corn crop decay deep stall denitrification drainage dry matter elements of plant Experiment Station fact farm farmer feeding fertilizing constituents fertilizing materials fertilizing value field grain green manuring ground grown hot fermentation humus important inches increase ingredients kainite land leaching legumes leguminous lime liquid excrement loss of nitrogen lysimeters manure produced materials ments method mineral matter mixed moisture necessary nitrate of soda nitrification nitrifying bacteria nitro nitrogen nure obtained organic matter oxygen phoric acid phos phosphate phosphoric acid plant food plant growth plots plowed pounds practically present rains ration removed rock roots rotation shown soil soil contains soluble substances sufficient sulphate superphosphate supply surface tillage tion urine wheat yield