Primer of IrrigationAnderson Publishing Company, 1903 - 257 páginas |
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Términos y frases comunes
absorb acre alkali soils ammonia animal application of water arid and semi-arid atmosphere barley beets capillary action carbonic acid cent chapter chemical clay condition corn crop cubic foot cultivation deep depth diameter diastase ditch drain drainage earth elements evaporation excess farmer feet equals fertility flow foot per second furrow gallons garden grain grape ground grow growth heat humid regions humus hydrogen inches infiltration inorganic irri irrigating water irrigation leaves less lime magnesia manure measure metre moist moisture nature necessary nitric acid orchard organic matter oxygen pipes plant food plow potash potatoes pounds practical profitable pulverized pump purpose quantity of water rain rainfall raise reach reason require reservoir salts sand seed seepage semi-arid semi-arid regions silicates slope small fruits soda soil square starch stream sub-irrigation subsoil substances sugar surface tion tivation trees vegetable matter vines water table weight wheat windmill winter woody fiber
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Página 256 - ... in the table. 6. Though the weather, from a variety of irregular causes, is more uncertain in the latter part of autumn, the whole of winter, and the beginning of spring, yet, in the main, the above observations will apply to those periods also.
Página 128 - That the tables in the schedule hereto annexed shall be recognized in the construction of contracts and in all legal proceedings as establishing in- terms of the weights and measures now in use in the United States: the equivalents of the weights and measures expressed therein in terms of the metric system...
Página 249 - Measure the girt close behind the shoulder, and the length from the fore part of the shoulderblade along the back to the bone at the tail which is in a vertical line with the buttock, both in feet. Multiply the square of the girt, expressed...
Página 12 - ... nutritive substances on which life depends. A plant is not, like an animal, endowed with special organs to dissolve the food and make it ready for absorption ; this preparation of the nutriment is assigned by another law to the fruitful earth itself, which in this respect discharges the functions performed by the stomach and intestines of animals.
Página 254 - To find the area of a circle, multiply the square of the diameter by .7854.
Página 249 - To get, then, the quantity of shelled corn in a crib of corn in the ear, measure the length, breadth and height of the crib, inside of the rail; multiply the length by the breadth and the product by the height; then divide the product by two, and you have the number of bushels of shelled corn in the crib.
Página 249 - ... 945, and this, divided by 21, gives 45 stones exactly. It is to be observed, however, that in very fat cattle the four quarters will be about one-twentieth more, while in those in a very lean state they will be one-twentieth less, than the weight obtained by the rule.
Página 112 - Ammonia is formed by the union of the hydrogen of the water with the nitrogen of the atmosphere ; and nitre, by the union of oxygen and nitrogen ; the oxygen may also unite with the carbon contained in the soil, and form carbonic acid gas, and carburetted hydrogen. Heat is given out during these processes, and " hence,
Página 203 - ... inches perpendicular, inside measurement, except boxes delivering less than twelve inches, which may be square, with or without slides; all slides for the same shall move horizontally and...
Página 107 - As the systems of roots, branches, and leaves are very different in different vegetables, so they flourish in most different soils; the plants that have bulbous roots require a looser and a lighter soil than such as have fibrous roots ; and the plants possessing only short fibrous radicles, demand a firmer soil than such as have taproots, or extensive lateral roots.