First Principles of Soil FertilityOrange Judd, 1908 - 265 páginas |
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... 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 94 105 113 127 137 150 165 173 185 · 197 209 219 233 242 PART ...
... 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 94 105 113 127 137 150 165 173 185 · 197 209 219 233 242 PART ...
Página 152
... phosphate or super - phosphate are often recommended as preserva- tives for manure , and to prevent the loss of nitrogen . These substances are all said to be injurious to the hoofs of animals , and when used should be scattered on the ...
... phosphate or super - phosphate are often recommended as preserva- tives for manure , and to prevent the loss of nitrogen . These substances are all said to be injurious to the hoofs of animals , and when used should be scattered on the ...
Página 196
... in this style of farming for as Wagner says , " The art of manuring is dependent upon a rational application of nitrogen . " CHAPTER XVIII POTASH AND PHOSPHATE FERTILIZERS Potash Sometimes Necessary in 196 FIRST PRINCIPLES OF SOIL ...
... in this style of farming for as Wagner says , " The art of manuring is dependent upon a rational application of nitrogen . " CHAPTER XVIII POTASH AND PHOSPHATE FERTILIZERS Potash Sometimes Necessary in 196 FIRST PRINCIPLES OF SOIL ...
Página 197
... is believed . by many careful observers , -and the belief has been substantiated in large part by experiments already con- ducted , that the average commercial fertilizer does not contain 197 Potash and Phosphate Fertilizers.
... is believed . by many careful observers , -and the belief has been substantiated in large part by experiments already con- ducted , that the average commercial fertilizer does not contain 197 Potash and Phosphate Fertilizers.
Página 199
... with sulphuric acid ) . The actual potash in this compound costs a trifle more a pound than in the muriate . A lower grade sulphate containing about 26 per cent of potash mixed with POTASH AND PHOSPHATE FERTILIZERS 199.
... with sulphuric acid ) . The actual potash in this compound costs a trifle more a pound than in the muriate . A lower grade sulphate containing about 26 per cent of potash mixed with POTASH AND PHOSPHATE FERTILIZERS 199.
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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.