G. W. 2002. Cattle manure and lime amendments to improve crop production of acidic soils in northern Alberta. Can. J. Soil Sci. 82: 227-238. Crop production on acid soils can be improved greatly by adjusting the pH to near neutrality. Although soil acidity is commonly corrected by liming, there is evidence that animal manure amendments can increase the pH of acid soils. Fresh cattle manure and agricultural lime were compared for their effects on soil acidity and the production of canola (Brassica napus L.) and wheat (Triticum aestivum L.) in a greenhouse study. Canola and wheat yield, the nutrient content of grain and straw, and selected soil properties were determined on a Gray Luvisol (pH 4.8) from the Peace Region of Alberta. Soil pH increased with lime and manure applications, and canola and wheat yields were higher in limed and manureamended soils than unfertilized, unlimed soils. Macronutrient uptake by canola and wheat was generally improved by liming and manure applications, and micronutrient uptake was related to the effects of lime and manure on soil pH. An economic analysis compared the costs of using cattle manure and lime to increase soil pH to 6.0. The costs of applying lime and fresh cattle manure to increase soil pH were compared, based on the fees for purchasing and applying lime or loading, hauling and applying manure. The nutrient value of manure was calculated based on the quantities of plant-available N, P and K in fresh manure. At distances less than 40 km, it is economical to substitute fresh cattle manure for agricultural lime to increase soil pH of acidic soils. However, good manure management practices should be followed to minimize the risk of nutrient transport and environmental pollution from agricultural land amended with cattle manure.Key words: Agricultural economics, canola production, cattle manure, lime, soil pH, wheat production Whalen, J. K., Chang, C. et Clayton, G. W. 2002. L'amélioration de rendement dans les sols acides au nord de l'Alberta avec du fumier bovin et de la chaux. Can. J. Soil Sci. 82: 227-238. Il a été établi que les cultures en sols acides peuvent être améliorées en applicant un élément alcanisant, principalement de la chaux agricole, afin d'approcher le seuil de la neutralité. Or, si la chaux demeure assez populaire, il a déjà été suggéré que l'application de fumier peut aussi augmenter le pH du sol. L'expérience présentée dans cet article consistait à comparer l'impact d'un fumier frais de bovin sur le pH, ainsi que les cultures du canola (Brassica napus L.) et du blé (Triticum aestivum L.) à celui de la chaux. Les cultures étaient effectuées en serre sur un Luvisol gris (pH 4.8) de la région de Peace River en Alberta. Le pH du sol a augmenté avec l'application de la chaux et du fumier. Non seulement il est démontré qu'en general, les récoltes de blé et de canola sont plus abondantes sur les sols traités avec de la chaux ou du fumier que sur ceux traités seulement aux engrais chimiques, mais également que les deux traitements permettent une meilleure abs...