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INDICADORES PARA ESTIMAR LA SOSTENIBILIDAD AGRÍCOLA DE LA CUENCA MEDIA DEL RÍO REVENTADO, CARTAGO, COSTA RICA 1

INDICADORES PARA ESTIMAR LA SOSTENIBILIDAD AGRÍCOLA DE LA CUENCA MEDIA DEL RÍO REVENTADO, CARTAGO, COSTA RICA 1,Laura Ramírez,Alfredo Alvarado,Rosendo

INDICADORES PARA ESTIMAR LA SOSTENIBILIDAD AGRÍCOLA DE LA CUENCA MEDIA DEL RÍO REVENTADO, CARTAGO, COSTA RICA 1  
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Development of indicators for work was designed to generate sustainability indicators for the agricultural sector of the Reventado River watershed. Land use through time increased soil cations accumulation (Ca Mg y K) but decreased acidity saturation as a result of fertilizer and lime applications. Available P also increased with the period of land use, increasing at an approximated rate of 2.3 mg.l -1 .year -1 . The increase of P with time might allow the farmers to reduce its application to reduce costs and improve sustainability of the ago-ecosystem. Most farms suffered moderate rates of erosion. As erosion rates increased, the thickness of the A horizon and available P contents diminished, all of this while erosion rates increased from nil, to moderate to severe. Better soil structural index values were found in soil capability classes II y III, while in higher capability classes' structure was weaker and soils more susceptible to erosion. No significant differences were found between land capability classes and crop yields. Both potato and onion yields were better in irrigated fields, the fact reflected also in higher B/C ratios, particularly around Tierra Blanca. Economical and social indicators of the study were positive but environmental indicators were negative for
Published in 2008.
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