Abstract

MONROY-RODRIGUEZ, Fanny Liliana; ALVAREZ-HERRERA, Javier Giovanni  and  ALVARADO-SANABRIA, Óscar Humberto. SPATIAL DISTRIBUTION OF SOME FISICAL SOIL PROPERTIES IN A TRANSECT OF THE TUNGUAVITA FARM, PAIPA. rev.udcaactual.divulg.cient. [online]. 2017, vol.20, n.1, pp.91-100. ISSN 0123-4226.

The use ofgeostatistical techniques allows to find the variability of soil properties and also facilitates interpretation, prediction and decision making. Therefore, in order to establish the impact of management that has been given to the farm Tunguavita, a transect was conducted in which 85 sample points were taken, located found in a wooded area, an area devoted to pasture, and an area of equine exploitation. Volume mass ratios, humidities in depth and resistance to penetration at two depths was determined. Aeration was the mass-volume ratio that had the highest variation coefficient, which implies the different management practices along the evaluated transect. The particle density and porosity have a low dispersion in space. Bulk and particle densities, porosity, aeration and voids ratio presented a range higher than 1000m. Therefore, sampling for penetration resistance and moisture with TDR measurements should be done each 600m. Resistance to penetration showed to be inversely proportional to the moisture content in the soil. The measured variables are correlated in two groups, the first one associated densities with the humidities, measured at different depths, and the second group related to penetration resistance at 15cm with measurement at 30cm. The penetration resistance is a good indicator of soil compaction and the agricultural management that occurs in the Tunguavita farm.

Keywords : Geostatisttca; semivariogram; kriging; soil compaction; variability.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )