First Principles of Soil FertilityKegan Paul, Trench, Trubner, 1910 - 265 páginas |
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Página 14
... Clover Peas Potatoes Tons of water for one ton dry matter • 461.1 503.9 270.9 576.6 477.2 385.1 From this and other data he calculated the minimum amount of available water necessary to produce the various yields of the more common ...
... Clover Peas Potatoes Tons of water for one ton dry matter • 461.1 503.9 270.9 576.6 477.2 385.1 From this and other data he calculated the minimum amount of available water necessary to produce the various yields of the more common ...
Página 25
... 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 manured with a nitrogenous fertilizer . Some writers tried to explain this fact by ...
... 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 manured with a nitrogenous fertilizer . Some writers tried to explain this fact by ...
Página 26
... clover , etc. , or in other words to the so- called " legumes " or " leguminous plants . " It remained for Hellriegel to explain this phenomenon . He re- peated the experiments of Boussingault with this varia- tion that to the soil in ...
... clover , etc. , or in other words to the so- called " legumes " or " leguminous plants . " It remained for Hellriegel to explain this phenomenon . He re- peated the experiments of Boussingault with this varia- tion that to the soil in ...
Página 27
... clover to obtain nitrogen by means of the bacteria in the root - nodules . Both pots received all the elements of plant food except nitrogen The pot on the right was inoculated with the proper bacteria , while that on the left was not ...
... clover to obtain nitrogen by means of the bacteria in the root - nodules . Both pots received all the elements of plant food except nitrogen The pot on the right was inoculated with the proper bacteria , while that on the left was not ...
Página 28
... clover to perfection , when soy beans or alfalfa will not thrive on it at all . This fact explains many of the disappointments experienced by farmers in the trials of some of the more recently Effect of inoculation on yield . The plant ...
... clover to perfection , when soy beans or alfalfa will not thrive on it at all . This fact explains many of the disappointments experienced by farmers in the trials of some of the more recently Effect of inoculation on yield . The plant ...
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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