OCR Text |
Show /'./ 103 ing system, and the corrugated 3ystom. Por successful Irrigation, both require leveling and careful preparation of the land. Tho first 13 usually employed in a fairly level region, 'i'he fields are divided, checker board fashion into basins, froa 40 to 60 feet wids, and from 600 to 700 feet long. The basins are separated by low ridges a foot or so high. The basins must have a gentle slope from one end to the other hut must, have no humps or hollows, otherwise t_» plants on the high places will receive vory little if any water, and those in tha hollows will be drowned out. Tno corrugated method ia usually employed when the land lies at toe steep an angla for practical basining. Small furrows about two inches deep and about eight inches «ap§rt, like the marks of a rake, lead from the head ditoh over the field3. Care must be exercised that the furrows are not too 3teop, or the quantity of water too great, other-vise -sashing will take piece. The length of tho furrows depends upon the nature of the soil, on a haavy soil they oan be larger than on a light sandy one. As a general rule the furrows, to save bothtimo and water, should not exceed 300 to 400 feet in length. The furrows should as a rule be laid out obliquely to the contours, but zimy farmers follow the procedure of nutting them in 10? |