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Lethbridge Herald Newspaper Archives

- Page 38

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Lethbridge Herald, The (Newspaper) - March 19, 1974, Lethbridge, Alberta 14 LETHBRIDGE HERALD Timday, March The Uthbridge Herald CHINOOK Saturates the ENTIRE Southern Alberta Market Copies Reach Over City and Rural Readers Don't Ever Buy Advertising in the Dark We submit our records to the regular scrutiny of the Audit Bureau of Circulation and our circulation practices to the discipline of their regulations! Published every two weeks Circulation Guaranteed Coaktate Crantartf IMBofMa DiflfitoiKf CMy Iron Springs Kipp SttrUnQ TvfetfUvtr Your Advertisinj Massage will laid tta Residents of 37 Connunities IB Soatlera Alberts: Standoff Tiltey Twin Butte Grassy Lake Lagond Purpte Springs SLKiMa Vauxhall Milk River Coutts Vulcan Scandia GILL 3284411 FOR FURTHER INFORMATION The Letftbridge Herald "Serves the South" Monarcft Carmangay CnfMhoIni Covtoy KMtakty Research Station report Weather and agriculture By E. H. HOBBS Agricvltaral. Engineer In 1973, total precipitation rain and snow combined amounted to only 9.6 inches at the Lethbridge Research Station. Of the previous 72 years of weather records, only in 1910 and 1918 did we receive less precipitation; less than eight inches. Last year was also the 6th consecutive year in which precipitation was. below tbe average of 16.2 inches. This equals the previous longest period of below average precipitation, which lasted from 1917 through 1922. In both the 1920 and the present periods, drought has been more prolonged and severe than during the infamous "dirty 30s." From 1917 to 1922, annual precipitation averaged 11.8 inches. From 1934 to 1939, the driest six years of the 1930s, tt averaged U.9 inches, and during the last six years it averaged 13.1 inches per year. Factors There is more to drought then just lack of precipitation. Temperature extremes, rainfall distribution, wind velocity, and relative humidity are important meteorological factors that combine with lack of precipitation to create conditions that may be harmful to growing crops. One frequently used index of drought is evaporation from a water surface, which is related primarily to temperature, wind velocity, and relative humidity. May to October evaporation in the 1930s averaged 38 inches, but in 1968 to 1973 it averaged 46 inches. Unfortunately, no records are available for earlier drought periods. The recent drought has not reduced crop production as much as previous ones. This is apparent if we express production as the ratio of grain harvested to precipitation received. For grain fallow rotations on dryland at Lethbridge. this ratio was 1.4 bushels per inch of precipitation in the 1920 drought. It increased to 1.8 during the 1930s and was 2.8 in the last six years. Effect If we consider only rainfall during the months of May. June, and July, the comparable ratios are fours, 4.6, and 6.4. Obviously, we are making better use of available moisture now than we did years ago. Several agricultural developments have helped to offset the adverse effects of drought. Large tractors and cultivation equipment make it possible to perform operations when they are needed; this is vital for moisture conservation in fallow, for seedbed preparation, and for seeding. SQUEEZE GATE Hsrs Is tfw IdMt aquoata gate for fMar praaant aquaaia or can bs easily attaclMd to your currant working aHey. No way animal can choke. Auto- matte Iwad catch eaay one-man AU SOUTHERN ALBERTA CO-OP STORES OERftrS TRADING POST, FORT MACLEOD VERM ARNOLD. FOREMOST awl at MM plant CLINT'S EQUIPMENT UMTED MADE IN CANADA BY CANADIANS" CAROSTON, Alberta Phoiw 653-3534 Blade-type cultivation equipment has introduced cultural methods that increase moisture conservation and reduce wind erosion. Herbicides have provided a tool with which to fight weeds and conserve moisture for the growing crop. Fertilizer is being recommended on the basis of need as determined by soil analysis. SENCOR Herbicide Gets tough weeds in potatoes SENCOR will also provide some control of couchgrass (quackgrass) and yellow nutsedge When other herbicides let grass or broadleaf weeds through, or when infestation is extra heavy, call on SENCOR Apply it. _ Pre-emerge Early post-emerge (except on early S red-skinned varieties) Both ways No pre-mixing Moderate agitation Doesn't stain skin Doesn't stain clothing When you need 'Good Stuff' tor tough weed conditions, order SENCOR 50% WettaWe Powder from your supplier. Lady's thumb Pigiwcd to fou future. CHEMAGRO LIMITED 77 CiJy Ccnwe Drive Mississauga ;