First Principles of Soil FertilityKegan Paul, Trench, Trubner, 1910 - 265 páginas |
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... amount of repetition has been purposely used in the text ; for it is felt that in this way only can the more important facts be given the emphasis which they deserve , but it is thought that this method of treatment has not been carried ...
... amount of repetition has been purposely used in the text ; for it is felt that in this way only can the more important facts be given the emphasis which they deserve , but it is thought that this method of treatment has not been carried ...
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... Amount and Value of Manure produced on Farm 127 XIII . 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 ...
... Amount and Value of Manure produced on Farm 127 XIII . 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 ...
Página 9
... hydrogen and oxygen . What remains after expelling the water is called the dry matter of the plant . The dry matter burns on being ignited and a very small amount of mineral matter remains , which is called ash . The INTRODUCTORY 9.
... hydrogen and oxygen . What remains after expelling the water is called the dry matter of the plant . The dry matter burns on being ignited and a very small amount of mineral matter remains , which is called ash . The INTRODUCTORY 9.
Página 13
... amount that would make a layer over the acre about 8 inches deep . This again takes no account of the quantity of water lost from the land by percolation or drainage . It has been estimated that this amount is at least equal to that ...
... amount that would make a layer over the acre about 8 inches deep . This again takes no account of the quantity of water lost from the land by percolation or drainage . It has been estimated that this amount is at least equal to that ...
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... amount of water used by the crop was from 300 to 500 times the weight of the dry matter . His results are summarized in the following table . AVERAGE AMOUNT OF WATER USED TO PRODUCE ONE TON OF DRY MATTER Crop grown Barley . Oats Corn ...
... amount of water used by the crop was from 300 to 500 times the weight of the dry matter . His results are summarized in the following table . AVERAGE AMOUNT OF WATER USED TO PRODUCE ONE TON OF DRY MATTER Crop grown Barley . Oats Corn ...
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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