Abstract

VILLAZON-GOMEZ, Juan Alejandro; MARTIN-GUTIERREZ, George; COBO-VIDAL, Yakelín  and  HERNANDEZ-ROJAS, Daniel. Resistance to penetration in a Chromic Vertisol with natural pasture. Pastos y Forrajes [online]. 2018, vol.41, n.3, pp. 202-207. ISSN 2078-8452.

The objective of the study was to characterize the resistance to penetration in a Chromic Vertisol with natural pasture. The determinations were made on 61 spots, every 0,50 m, along a 30 m long transept, at the depths of 0-10, 10-20, 20-30 and 0-30 cm. For the univariate description, numeric and graphic methods and the Kolmogorov-Smirnov normality test were used. There was an increase of resistance to penetration in the 10-20 cm layer, where all the position measures were higher except the minimum value, as well as the dispersion ones. The kurtosis results indicated that, in the distribution tails of resistance to penetration in the intermediate layer there was higher quantity of observations than in the tails of a normal distribution. The percentages of resistance to penetration (from the total of observations) were: 29,51 and 74,49 % at the depth of 0-10 cm; 19,67 and 79,30 % at 10-20 cm; and 26,20 and 73,77 % at 20-30 cm. It is concluded that, according to the values found in the three depths, resistance can be classified from moderate to high.

Keywords : soil compaction; grazing; soil physical-chemical properties.

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