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Lethbridge Herald Newspaper Archives

- Page 29

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Lethbridge Herald, The (Newspaper) - October 29, 1974, Lethbridge, Alberta Tuesday, October 29, 1974 THE LETHBRIDGE HERALD Lethbridge Research Station Moisture summerf allow conservation By D. T. ANDERSON Agricultural Engineer Summerfallowing on dryland is conducted primarily to conserve moisture that would be lost by evaporation, plant use, snow-melt runoff, and perhaps percolation beyond the root zone Stor- ing water in the soil im- proves crop production and reduces the effects of drought. At the Lethbridge Research Station, various fallowing practices have been studied over five years to see how" efficiently they save moisture. An average of 20.8 inches of precipitation fell in the 19-month fallow period from one harvest to next seeding We found that fallowing conserved 24 per cent of this precipitation. In years of above-average rainfall, some moisture may percolate into soil below the root zone and so be lost. Moisture is preserved most efficiently during the first fall, winter, and spr- ing after harvest. During that period, in our ex- periments, precipitation averaged'7 2 inches and 47 per cent was saved. During the summer months, 71 inches of rain fell but evaporation losses were high and uncontrolled weeds rapidly depleted moisture reserves. As a result, only about nine per cent of the rainfall was conserved but this value varied considerably from year to year. In the second fall and winter, 6.5 inches of precipitation were received and 19 per cent was conserved. This study has shown the storage efficiencies that can be attained by using good practices. The study has shown that zero-tillage VANEE LIVESTOCK LTD. PORT MACLEOD Direct lint from 321.1477.234-4074.2344428 328-7331 328-3211 "Livestock Dealers and Order Buyers" COMPLETE CATTLELJNER SERVICE buy feeders on all markets in Alberta Contact us now for your feeder cattle. The ALL NEW... ALLIS-CHALMERS Model 7030 TRACTOR MEASURABLY BETTER TRACTORS Opan your ayat and compare... a big now power in the) land." A power that's going to optn a lot of and changa a lot 130 Hifief IWtf (7030) Tfcl PtWeTfal Oratl PtWeT fir Hijli Spud hraAe] PidBfatl hr fist smiciif Rvjfif PiwtT ti lufi pans fiwir Strttchiii Hydmlic SfitM with capacity fir pi MIK Wl GvHIvnMIW SHI MfM tar to wif yw fini IM ptan in fm Hi heWS fin. MUSaTI fto 7030 MliKl HW IIVeT INliflMalS We're Gonna Open Your lyes! Sefwice Street North Phone 328-8952 fallows using chemicals to control weeds and tillage only to prepare the seedbed can conserve moisture as efficiently as tilled fallow Zero-tillage fallows were slightly less efficient dur- ing the summer months than some fallows that combined the use of chemicals and tillage, but differences were usually made up during the final fall and winter-period. The value of soil-stored moisture was well il- lustrated during the 1974 crop year The growing season was unusually dry Rainfall at the Station for May, June, and July was 178, 0.60, and 1.06 inches compared with the longtime averages of 213, 3 04, and 1.65 inches, respectively. During June and July, the crops had to rely primarily on soil-stored moisture We found that spring wheat extracted 5.25 inches from the soil to a' depth of five feet. This moisture, plus the rain that fell (4.25 inches in May to produced 21 bushels of grain Moisture stored in land fallowed by tillage or by chemicals was a major factor in assuring a reasonable yield in the drought that prevailed for early-seeded crops in 1974" SKI-DOO WE ARE CLOSING OUT OUR ENTIRE STOCK! 1974 CARRY OVER MODEift 1 1974 TNT 295 Demonstrator 2 1974 Olympic 300 Demonstrators. Each........ USED SNOWMOBILES 1 1972 Yamaha 292 GP 1 1968Ski-Doo Alpine370 1 1968Ski-Doo Nordlc371 '350 '250 JOHNSON PONTIAC-BOICK LTD. Phone 653-3672 CYLINDER HEADS We can recondition your CYLINDER HEAD CYLINDER HEAD PRESSURE TESTING CYLINDER HEAD CRACKS REPAIRED VALVE GUiCSS RECONDITIONED FOR COMPLETE DETAILS CONTACT: SHOP PHONE 328-9888 BAALIM WHOLESALE LTD. 205-10th Stnwt South Phone 327-8517 UN GARAGE ir SERVICE STATION NEAREST YOUI ;