First Principles of Soil FertilityOrange Judd, 1908 - 265 páginas |
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... Commercial Fertilizers - Nitrogen . XVIII . Potash and Phosphate Fertilizers XIX . Mixed Fertilizers XX . Using Commercial Fertilizers XXI . Buying Commercial Fertilizers . XXII . Indirect Fertilizers PAGE 3 12 21 31 47 63 75 85 94 105 ...
... Commercial Fertilizers - Nitrogen . XVIII . Potash and Phosphate Fertilizers XIX . Mixed Fertilizers XX . Using Commercial Fertilizers XXI . Buying Commercial Fertilizers . XXII . Indirect Fertilizers PAGE 3 12 21 31 47 63 75 85 94 105 ...
Página 114
... fertilizing value of the manure produced by the different classes of farm animals of the United States would , therefore ... commercial fertilizers , and are possibly somewhat too high from a practical standpoint . On the other hand , it ...
... fertilizing value of the manure produced by the different classes of farm animals of the United States would , therefore ... commercial fertilizers , and are possibly somewhat too high from a practical standpoint . On the other hand , it ...
Página 115
... fertilizing value of the different animal excrements and are , therefore , of importance to one who is purchasing ... commercial fertilizers at the present , time . All the valuations given in the following pages will be on the same ...
... fertilizing value of the different animal excrements and are , therefore , of importance to one who is purchasing ... commercial fertilizers at the present , time . All the valuations given in the following pages will be on the same ...
Página 116
... commercial fertilizers , granting • that the manure is so managed as to prevent loss 116 FIRST PRINCIPLES OF SOIL FERTILITY.
... commercial fertilizers , granting • that the manure is so managed as to prevent loss 116 FIRST PRINCIPLES OF SOIL FERTILITY.
Página 132
... commercial fertilizers , the trade price not necessarily being any indication of the agricultural value of the material , and there is no doubt that the farmer who receives the best returns from commercial fertilizers is also the one ...
... commercial fertilizers , the trade price not necessarily being any indication of the agricultural value of the material , and there is no doubt that the farmer who receives the best returns from commercial fertilizers is also the one ...
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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
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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.