First Principles of Soil FertilityKegan Paul, Trench, Trubner, 1910 - 265 páginas |
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Página 163
... bone meal , and one of the potash salts to the heap . In this way the plant food in the bone meal is made available to the plants , and the compost is made more valuable . It occasionally happens that one wishes to produce a stock of ...
... bone meal , and one of the potash salts to the heap . In this way the plant food in the bone meal is made available to the plants , and the compost is made more valuable . It occasionally happens that one wishes to produce a stock of ...
Página 191
... bones , ten- dons , waste flesh , hair , etc. These materials are ren- dered for the extraction of the fat , and the residue is dried and ground to a meal of more or less fineness . Tankage contains phosphoric acid as well as nitrogen ...
... bones , ten- dons , waste flesh , hair , etc. These materials are ren- dered for the extraction of the fat , and the residue is dried and ground to a meal of more or less fineness . Tankage contains phosphoric acid as well as nitrogen ...
Página 194
... bone meal are readily changed by nitrification and rank next to blood meal . Horn meal , on the other hand , decomposes very slowly , and the nitrification of leather is so slow as to make it practically worthless as a fer- tilizer ...
... bone meal are readily changed by nitrification and rank next to blood meal . Horn meal , on the other hand , decomposes very slowly , and the nitrification of leather is so slow as to make it practically worthless as a fer- tilizer ...
Página 201
... bones of dead animals , and certain phosphate - containing minerals which will be briefly considered . Raw Bone Meal is made by grinding raw bones to a powder , and the finer it is the more valuable the product . This substance contains ...
... bones of dead animals , and certain phosphate - containing minerals which will be briefly considered . Raw Bone Meal is made by grinding raw bones to a powder , and the finer it is the more valuable the product . This substance contains ...
Página 202
... bones contain a small quantity of fat as well , and , as this prevents rapid decay of the bone , the phosphoric acid and nitrogen in the meal are somewhat slowly avail- able to the crop . Steamed Bone Meal . - Most of the bone meal sold ...
... bones contain a small quantity of fat as well , and , as this prevents rapid decay of the bone , the phosphoric acid and nitrogen in the meal are somewhat slowly avail- able to the crop . Steamed Bone Meal . - Most of the bone meal sold ...
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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