The experiment was conducted under greenhouse conditions at the Soil Science Department of the Federal University of Lavras, Lavras, from August 1995 to June 1996. The objectives were to evaluate the application of limestone on several chemical properties and on the nutrition and production of common bean cultivated in samples of four lowland soils and to compare the doses established as appropriate according to base saturation and Al and Ca + Mg methods. A 6×4 factorial scheme in a completely […]

This study was carried out using soil samples collected from a Podzol grown with orange trees, at Estação Experimental de Umbaúba, Umbaúba-SE (CPATC-EMBRAPA), to evaluate the acid and alkaline phosphatases activities from a coastal tableland soil submitted to different base saturation values (32, 45, 68 and 76.6%) and the relationships between soil characteristics and these activities. Positive responses to the increment of base saturation were observed for pH, organic matter content, available phosphorus and acid and alkaline phosphatases activities, in […]

This study was carried out at the Experimental Station “La Poveda” in Arganda del Rey (Madrid), with the following geographical coordinates: latitude 40º 19′ N; longitude 3º 19′ W Gr; and altitude 550 m. The main objective was to study the spatial variability of chemical and physical properties of a Typic Xerofluvent under three cultivation systems. Sampling for the study of spatial variability was performed according to an appropriate geo-statistical analysis in two directions. Spatial variability was observed with respect […]