Abstract— Typical soils of Southwestern Buenos Aires Province were evaluated to determine quality and capability for cereal and forage production having in mind potential improvements due to amendment with organic residual from agroindustrial wastes process. Studied soils from Mollisol order were, Argiudoll and Argiustol suborder, of marginal area of Pampa Argentina. The organic matter content of those soils corresponded to weakly humic soils which shows the transition from the Pampas zone to the semi-arid zone and indicates a major limiting factor. Granulometric analyses were similar, with a sandy loam texture for the Tres Arroyos soil and a borderline sandy silt loam for the Cabildo soil. Anycase the results were below the limit that indicates salinity problems. Low availability of essential micronutrient like Copper and Molibdenum were another limiting factor of the Tres Arroyos soil, where the cultivation of winter grains, such as wheat and barley is very important for regional economy. The availability of the micronutrients Zn and Cu are strongly dependent on the soil pH; therefore, the more alkaline the conditions (such as for the Cabildo soil), as a limiting factor mainly for cereals sensitive to Cinc deficiencies like maize and sorghum. Soils from this marginal areas of the Pampas (Argentina), could be improved with respect to the factors that limit soil quality and productivity.
Keywords— Soil, properties, limiting factors, degradation.
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