The Primer of Irrigation

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 centimetre cubic foot cubic inches cultivation deep depth diameter diastase ditch drain drainage earth elements evaporation farmer feet equals fertility flow foot per second furrow gallons garden grain ground grow growth heat humid regions humus hydrogen 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 produce profitable pulverized pump purpose quantity of water rain rainfall raise reach reason require reservoir ridge salts sand seed seepage semi-arid semi-arid regions silicates slope small fruits soda soil square starch stream sub-irrigation subsoil substances surface tion trees vegetable matter vines water table weight wheat windmill woody fiber