First Principles of Soil FertilityKegan Paul, Trench, Trubner, 1910 - 265 páginas |
Dentro del libro
Resultados 1-5 de 46
Página 3
... animals that are useful to man . A real knowledge of farming neces- sitates a knowledge of the principles upon which the art of agriculture is founded ; for an understanding of these principles is essential to an intelligent and ...
... animals that are useful to man . A real knowledge of farming neces- sitates a knowledge of the principles upon which the art of agriculture is founded ; for an understanding of these principles is essential to an intelligent and ...
Página 5
... animals or animal products . Even in the latter case the feeding crops that can be grown upon the farm determine its earning power , for the sale of animal products is simply. Plants are of first importance to agriculture , The ...
... animals or animal products . Even in the latter case the feeding crops that can be grown upon the farm determine its earning power , for the sale of animal products is simply. Plants are of first importance to agriculture , The ...
Página 6
Alfred Vivian. power , for the sale of animal products is simply an indirect method of marketing the crops . The profit ... animals , the average farmer has only very vague and often false notions on the subject of plant food and plant ...
Alfred Vivian. power , for the sale of animal products is simply an indirect method of marketing the crops . The profit ... animals , the average farmer has only very vague and often false notions on the subject of plant food and plant ...
Página 16
... animals do , for all cells must have a supply of oxygen in order to live . The oxygen of the air combines with the materials in the cells one of the results being the production of heat , just as the oxidation taking place in the animal ...
... animals do , for all cells must have a supply of oxygen in order to live . The oxygen of the air combines with the materials in the cells one of the results being the production of heat , just as the oxidation taking place in the animal ...
Página 19
... Animals live directly or indirectly on plants , and breathe out the carbon they consume in the form of carbonic acid gas . It will thus be seen that the carbon is continually in circulation , being combined by the plant into complex ...
... Animals live directly or indirectly on plants , and breathe out the carbon they consume in the form of carbonic acid gas . It will thus be seen that the carbon is continually in circulation , being combined by the plant into complex ...
Otras ediciones - Ver todas
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