First Principles of Soil FertilityKegan Paul, Trench, Trubner, 1910 - 265 páginas |
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Página 11
... Lime 1.6 Magnesia 1.4 Iron Oxide 0.3 Sulphuric Acid 0.3 Soda 0.4 Silica 2.4 ( NOTE . All of the elements mentioned above as occurring in the ash , with the exception of chlorine , are combined with oxygen . In the table the names under ...
... Lime 1.6 Magnesia 1.4 Iron Oxide 0.3 Sulphuric Acid 0.3 Soda 0.4 Silica 2.4 ( NOTE . All of the elements mentioned above as occurring in the ash , with the exception of chlorine , are combined with oxygen . In the table the names under ...
Página 23
... lime , or some other substance that will neutralize any acid produced in the soil , is essential to nitrification . All of these points will be discussed in greater detail later ; for the present it is sufficient to emphasize the ...
... lime , or some other substance that will neutralize any acid produced in the soil , is essential to nitrification . All of these points will be discussed in greater detail later ; for the present it is sufficient to emphasize the ...
Página 33
... lime , phosphoric acid , magnesia , iron and sul- phuric acid are absolutely essential to plant growth . Toward soda , chlorine and silica plants seem to be in- different , as they can grow to maturity in the absence of these substances ...
... lime , phosphoric acid , magnesia , iron and sul- phuric acid are absolutely essential to plant growth . Toward soda , chlorine and silica plants seem to be in- different , as they can grow to maturity in the absence of these substances ...
Página 38
... Lime probably performs a number of functions , one of which is to neutralize the poisonous oxalic acid formed in the plant and render it harmless by produc- ing the insoluble calcium oxalate . Of the part played by the other elements ...
... Lime probably performs a number of functions , one of which is to neutralize the poisonous oxalic acid formed in the plant and render it harmless by produc- ing the insoluble calcium oxalate . Of the part played by the other elements ...
Página 41
... lime , but in most cases lime is present in sufficient abundance for the growth of the plant . In this study of the effect of the removal of the crop upon the amount of plant food in the soil , then , it will simplify matters to confine ...
... lime , but in most cases lime is present in sufficient abundance for the growth of the plant . In this study of the effect of the removal of the crop upon the amount of plant food in the soil , then , it will simplify matters to confine ...
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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