Caracterização do solo do declive do campo experimental da ESUDER – Pambarra 1

Abstract

The present study makes a characterization of the soil of the slope of the experimental field of ESUDER – Pambarra 1. The study was carried out inside and close to a trench with a depth of 2m. The soil under study has a loam texture, ranging from sandy loam to sandy loam clay, with a dark brown hue on its surface, but changing to a light gray hue as the depth increases, and in the last layer the soil color it's almost white. It has an abrupt and distinct boundary between horizons 3 and 4. It has few spots along the profile, presenting a fine and very fine class structure, of the lumpy, granular and angular type; and of simple, massive and moderate degree. When wet, it has a consistency that varies from very friable to firm along its profile. It has few pores and few roots along the profile. It has limestone at varying depths, in the 2m trench the limestone is at a depth of 104cm, but outside the trench the limestone is higher up, and can be found at a depth of 40cm. The soil is alkaline, as it has a pH greater than 7 throughout its profile, ranging from 7.14 to 8.41 based on pH 1:2.5 0.01M CaCl2 and 7.63 to 9.66 based on distilled water. It also has a salt content below 1m depth, but far from the critical salinity level. The soil has a very fast rate of infiltration, a penetrometric resistance to moisture at high field capacity, a very fast K s, a field capacity ranging from 22.1% to 3.2% by weight, a permanent wilting point ranging from 10.7 % to 1.0% by weight, an overall density ranging from 1139kg/m 3 to 1911kg/m 3 , a porosity ranging from 57.1% to 28.1% and a water availability ranging from 26 mm water/100 mm soil to 2.9 mm water/100 mm soil. A map with boundaries of this soil was created (TRADUÇÃO NOSSA)