EFFECTS OF CROPPING ON MACRO-AGGREGATION OF A MARINE CLAY SOIL

摘要: Field and growth chamber experiments were conducted to evaluate the short-term effects of selected crops on macro-aggregation a Kamouraska clay soil. Under field conditions, barley (Hordeum vulgare L.) alfalfa (Medicago sativa for up 2 yr resulted in increased macro-aggregate size stability compared fallow control initial conditions. these two crops, proportion water-stable aggregates 2- 6-mm fraction from 25% May 1986 40% September 1987 at expense 0.25- 1.0-mm which decreased 37% 19% over same period. Macro-aggregation after was not different corn (Zea mays control. Seasonal variations aggregate significant but small less important than cropping treatments. Results experiment agreed with those obtained under conditions suggesting that controlled environment can be used model ...