The Elementary Principles of Scientific Agriculture |
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absorbed abundant ammonia animals atmosphere bodies bone phosphate bones burning calcium carbonate Calcium oxide calcium sulphate called carbon dioxide caustic cent CHAPTER chemical chemist Chemistry chlorine clay Cloth clover combustion composition compounds constituents contains corn cotton cotton-seed crops cultivation decay decomposition deficient earth Elementary escape excrements farm farmer flame gases Geology gives growth of plants guano gypsum heat hydrochloric acid hydrogen important improvement of soils inorganic iron kind land lime liquid Magnesium Magnesium oxide manganese manganese dioxide manure marl mentioned metal mixed moisture necessary nitrate nitrogen organic matter oxygen phosphate phosphoric acid phosphorus piece plant-food planter plow portion potash Potassium oxide pounds principles produce properties quantity require rock roots rotation salts sand seed silica silicon sodium solid starch sub-soil substances sugar sulphuric acid superphosphate supply surface Text-Book tion valuable vegetable watery vapor wheat wineglass
Popular passages
Page 38 - ... from all the others. It conveys to plants, as well as animals, their nourishment and life ; it tempers the heat of Summer with its breezes ; it binds down all fluids, and prevents their passing into the state of vapor ; it supports the clouds, distils the dew, and waters the earth with showers ; it multiplies the light of the sun, and diffuses it over earth and sky ; it feeds our fires, turns our machines, wafts our ships, and conveys to the ear all the sentiments of language, and all the melodies...
Page 3 - No moneys are to be paid by the State, or out of the school fund, for the preparation of the necessary book. ill1...
Page 26 - Under this classification we are acquainted with the following divisions: 1. Pure clay, from which no sand can be removed by washing. 2. Strong clay, from which as much as 5 to 20 per cent.
Page 75 - The vigorous, healthy start which it gives to the young plant is very desirable for both corn and cotton, since weak, sickly plants are almost sure to suffer from insects or perish from other causes. This is one of the cheapest of fertilizers, and should be used by farmers or planters who desire an increase of production by a moderate outlay of money.
Page 44 - ... but that the quantity is exceedingly small, and is not injurious to the plants which furnish them. In the light of newer investigations touching the structure of roots and their adaptation to the medium which happens to invest them, we may well doubt whether agricultural plants in the healthy state excrete any solid or liquid matters whatever from their roots.
Page 74 - ... impurities, they are all remarkably adapted for agricultural uses as land plaster, which is of far more importance to this region. It is hardly necessary here to expatiate upon the uses of gypsum to agriculture. It is used both as a mixture, a plaster or top dressing and for composting with manure. "As a fertilizer* it furnishes lime and sulphur to plants, and is thought to have the power of absorbing ammonia from the air and supplying it to the plant.