First Principles of Soil FertilityOrange Judd, 1908 - 265 páginas |
Dentro del libro
Resultados 1-5 de 43
Página
... 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 I PLANT FOOD - ITS NATURE ...
... 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 I PLANT FOOD - ITS NATURE ...
Página 115
... Mixed 75.9 0.45 0.21 0.52 2.08 The moisture content also affects the physical proper- ties of the manure . Manures containing large amounts of water are " cold manures " ; that is they are manures which heat slowly because the amount of ...
... Mixed 75.9 0.45 0.21 0.52 2.08 The moisture content also affects the physical proper- ties of the manure . Manures containing large amounts of water are " cold manures " ; that is they are manures which heat slowly because the amount of ...
Página 125
... mixed farm ma- nures contain on the average 75 per cent of water , or only 25 per cent of dry matter , so that the 75 per cent of dry matter mentioned above as occurring in the manure , must be multiplied by four to find the total of ...
... mixed farm ma- nures contain on the average 75 per cent of water , or only 25 per cent of dry matter , so that the 75 per cent of dry matter mentioned above as occurring in the manure , must be multiplied by four to find the total of ...
Página 126
... mixed with the excrement of animals . In the best farm practice where the greatest possible use is made of all substances suitable for feeding there is seldom an excess of bedding materials . In case more litter than the theoretical ...
... mixed with the excrement of animals . In the best farm practice where the greatest possible use is made of all substances suitable for feeding there is seldom an excess of bedding materials . In case more litter than the theoretical ...
Página 131
... mixed . fertilizers . To determine the value of the manure pro- duced by the 50 cows it is only necessary to multiply the totals in the last table by the trade prices of the constituents . These calculations are given below : VALUE OF ...
... mixed . fertilizers . To determine the value of the manure pro- duced by the 50 cows it is only necessary to multiply the totals in the last table by the trade prices of the constituents . These calculations are given below : VALUE OF ...
Otras ediciones - Ver todas
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.