First Principles of Soil FertilityOrange Judd, 1908 - 265 páginas |
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... Applying Manure XVI . Barnyard Manure and the Maintenance of Fertility . XVII . Commercial Fertilizers - Nitrogen . XVIII . Potash and Phosphate Fertilizers XIX . Mixed Fertilizers XX . Using Commercial Fertilizers XXI . Buying ...
... Applying Manure XVI . Barnyard Manure and the Maintenance of Fertility . XVII . Commercial Fertilizers - Nitrogen . XVIII . Potash and Phosphate Fertilizers XIX . Mixed Fertilizers XX . Using Commercial Fertilizers XXI . Buying ...
Página 109
... their food requirements , manner of growth , root system and the season of the year in which they occupy the ground . Whatever fertilizers are used should be applied to the particular crop which will give ROTATION OF CROPS 109.
... their food requirements , manner of growth , root system and the season of the year in which they occupy the ground . Whatever fertilizers are used should be applied to the particular crop which will give ROTATION OF CROPS 109.
Página 110
Alfred Vivian. should be applied to the particular crop which will give the most profitable returns for their use . Résumé . - In Part I the reader was reminded that continuous cropping without the use of fertilizers finally results in ...
Alfred Vivian. should be applied to the particular crop which will give the most profitable returns for their use . Résumé . - In Part I the reader was reminded that continuous cropping without the use of fertilizers finally results in ...
Página 133
... applying the manure to the field there Such a barnyard still remains a handsome profit as a result of the ap- plication . A Profitable Calculation . - The easiest way for the farmer to calculate the value of the manure produced per year ...
... applying the manure to the field there Such a barnyard still remains a handsome profit as a result of the ap- plication . A Profitable Calculation . - The easiest way for the farmer to calculate the value of the manure produced per year ...
Página 155
... requires too much time and labor to prepare it , and it is not easily applied to the field . Protection of the manure from leaching rains by keeping it under Fermentation Must be Prevented . - The cover is more. PRESERVATION OF MANURE 155.
... requires too much time and labor to prepare it , and it is not easily applied to the field . Protection of the manure from leaching rains by keeping it under Fermentation Must be Prevented . - The cover is more. PRESERVATION OF MANURE 155.
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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
Pasajes populares
Página 225 - Furthermore, the mineral elements are relatively cheap, while the nitrogen is relatively expensive, and the economical use of this expensive element, nitrogen, is dependent to a large degree upon the abundance of the mineral elements in the soil. It is, therefore, advocated that for all crops and for all soils that are in a good state of cultivation, a reasonable excess of phosphoric acid and potash...
Página 1 - ... woods ; All silent is the earth and sky, Except with his own lonely moods The blackbird holds a colloquy. Over the broad hill creeps a beam, Like hope that gilds a good man's brow, And now ascends the nostril-stream Of stalwart horses come to plough.
Página 245 - One will seek to know what the different forms of plant-food are, what they do, from what sources they can be obtained, and how he can use them to best advantage. He will become to some extent an investigator, and will, of necessity, take a deeper interest in his work.