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Show IRRIGATION BY PUMPS GROWS Method Has Advantages and Disadvantages Disad-vantages and Usually Costs Mora Than Crsvlty System. iny K. I. HOl-fJK. rnl,.r1o EKtxrt-lmfnt Htatlnn.) IrrlKatlon by pumping is growing: all over the country. We have now hundreds of pumping plants where we had none a few years ago. It 1 has Its advantages and Its disadvantages, disadvan-tages, It usually costs more than gravi.y Irrigation, but It is available at any time ard Is a paying .imposition .imposi-tion on many of our farms. India Irrigates Irri-gates over three million acres from wells, and the time will come when America will surpass this A pumping supply of about 450 gallons a minute will he ample to Irrigate 80 acres. One thing to remember Is, when water wa-ter Is forced through a pipe, the faster It travels, tho greater the Ions :n frlc-tlon. frlc-tlon. This loss Is equivalent to In-creK.,ng In-creK.,ng tho pumping head, hence It Is better to use largo pipes Instead of small ones; It Is also best to hsve us few turns or elbows as possible and It is simply a question which must be derided for each Individual plant as to hut size pipe w ill be the most economical. The larger the pipe the nioro It costs, and yet with large pipe the enRlne msy be smaller and less fuel required to pump the required amount of water. |