First Principles of Soil FertilityKegan Paul, Trench, Trubner, 1910 - 265 páginas |
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... tion , 187 , 205 ; Professor F. H. King , Madison , Wisconsin , 62 ; L. H. Goddard , Ohio Experiment Station , 147 , 243 , 245 ; Professor V. H. Davis , Ohio State University , 103 ; Professor W. J. Frazer , University of Illinois , 159 ...
... tion , 187 , 205 ; Professor F. H. King , Madison , Wisconsin , 62 ; L. H. Goddard , Ohio Experiment Station , 147 , 243 , 245 ; Professor V. H. Davis , Ohio State University , 103 ; Professor W. J. Frazer , University of Illinois , 159 ...
Página 5
... tion of plant food in general , explaining what it is and its source of supply . Plants of First Importance to the Farmer . - All agriculture depends upon the growth of plants , and consequently the profit that accrues to the farmer de ...
... tion of plant food in general , explaining what it is and its source of supply . Plants of First Importance to the Farmer . - All agriculture depends upon the growth of plants , and consequently the profit that accrues to the farmer de ...
Página 9
... tion of the water which it contains . If the remainder is now heated in an oven at 212 ° F. it again decreases in weight , but finally reaches a point where the weight does not change , because all the water is driven off . Water is ...
... tion of the water which it contains . If the remainder is now heated in an oven at 212 ° F. it again decreases in weight , but finally reaches a point where the weight does not change , because all the water is driven off . Water is ...
Página 17
... tion . The rapid heating of silage in the silo is doubt- less due to the breathing process of the cell , the heat in this case being unable to escape . Carbon in Plants Derived from the Air . - Nearly one - half of the dry matter in the ...
... tion . The rapid heating of silage in the silo is doubt- less due to the breathing process of the cell , the heat in this case being unable to escape . Carbon in Plants Derived from the Air . - Nearly one - half of the dry matter in the ...
Página 22
... tion of plants , for the organic matter must first be decomposed , and the nitrogen changed into the form of nitrates . Nitrification . - The soil must not be regarded as an inert mass of mineral matter and refuse of former plant growth ...
... tion of plants , for the organic matter must first be decomposed , and the nitrogen changed into the form of nitrates . Nitrification . - The soil must not be regarded as an inert mass of mineral matter and refuse of former plant growth ...
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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