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Lethbridge Herald Newspaper Archives

- Page 48

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OCR Text

Lethbridge Herald, The (Newspaper) - May 14, 1974, Lethbridge, Alberta Research Station report Management of soil organic matter By DR. J. F. DORMAAR Soil Chemist The organic matter of a soil is the key to soil fertility and it is a natural resource that must be maintained. All living things depend MI thus its fertility DI-SYSTON Granular i Controls all including strains resistant to chlorinated hydrocarbon insecticides Long-lasting control up to 6 to 8 weeks after application. No protection gaps Protection the instant plants emerge. More natural insect control Insecticide inside the plant can't destroy beneficial insect populations when applied as directed For healthy give aphids and leafhoppers a smack in their suckers the instant they sit down to dinner Apply DI-SYSTON Granular as you plant Your dealer has it now RESPONSEabihty to you and nature CHEMAGRO LIMITED 77 City Centre Drive Mississauga Ontario level and consequent productivity are of prime importance As a soil organic matter must be managed with great care or lowering of fertility and loss of productivity will result. Soil organic matter is derived from plant and animal residues and it is constantly being used up and replenished. Studies on the cyclical transformation of organic matter in soil yields important information on the maintenance of this resource. At the Lethbridge Research particular attention is being paid to the changes ihat occur in organic matter in cultivated soils. or organic matter is more stable in some soils than in others. The stability depends on many factors that exert their efforts both individually and and to varying degrees. Moisture and temperature relationships within the soil and in the air above the soil for important factors responsible for these differences in stability. Because stability of organic matter vanes from one soil to management should be tailored to each soil individually for maximum effect Small amount Although the presence of organic matter in soil is essential for proper plant only small amounts are needed It is the maintenance of this small amount that is critical Each soil has its own minimum level of organic matter and again this level will vary from one site to another Any drop of the organic matter content beyond the critical level will reduce yields. the organic matter in some soils needs to be replenished much sooner than in other soils. In cultivated organic matter is replenished when roots and crop residues decompose. When wind erosion is the surface horizon with its organic matter is lost and replacement is difficult. For soils with unstable organic the problems of organic matter management are thus accentuated Good management will include both maintaining the level of organic matter and preventing loss of surface soil. ARE HERE INDIAN is o feather-weight machine designed to give you top performance on the down the along the highways or in town. Whether you choose a lOOcc or a 125cc INDIAN provides a full range of advanced features unique cushion floating rear wide tread tires with triple laced wheels. Auto- matic oil injection system if you choose the 10Occ. Time was when you didn't own a motorcycle unless it was an INDIAN. those times are back. Before you buy check out INDIAN on display now at the UFA FARM SUPPLY CENTRE nearest you. UniTED PARfllCRI FARM SUPPLY CENTRES ;