Caracterização do solo do campo experimental da ESUDER, Pambarra II

Abstract

This report is the result of research carried out in the experimental field of ESUDER, Pambara II. Its general objective is to characterize the soil, it was developed along the representative soil profile of 2 m in length, 2 m in height and 1 m in width, in the which some morphological parameters were described with the help of the Description Manual and INIA Soil Collection (1995). The soil presents five layers with a limit of the line of separation between them, from clear to diffuse and a flat boundary topography. The soil presents a smooth texture, ranging from sandy - frank to frank - sandy, with a very dark reddish brown on the surface, changing hue to red at as the depth increases. It has a lumpy to anisoform structure. angular, with a very fine size class and simple to weak grade. the consistency in terms of hardness, it presents a great variation with the depth from loose to hard. The soil it also has few medium and fine pores on the face of the profile and few medium roots, coarse and very fine due to the existence of a shrubby vegetation. the density of the soil varies from 1.35 to 1.61 Mg/m³ , verifying a tendency to increase with depth and a decrease in porosity from 49.2 to 39.4%. The ground has a speed of very rapid basic infiltration and hydraulic conductivity of saturated soil ranging from rapid the very fast. The resistance to penetration into the ground is moderately low which allows for a good development of the root system. The maximum (CC) and minimum (PMP) limit of water in the soil varies from 6.8 to 9.3 % and from 2.7 to 3.7 % by mass, respectively, influencing the availability of water in the soil that varies from 5.5 to 8.9 mm water⁄100 mm soil to along the profile. The soil has salt content far below the salinity level considered critical for plant development. Soil pH using distilled water (1:2.5) varies from 5.34 to 8.34 with low alkaline properties, except at depths of 100 − 120; ... 180 − 200 cm from the experiment (III) which are very acidic. Using 0.01 M CaCl2 the pH of the soil varies from 4.64 to 7.32 presenting low acidic properties at a depth of 0 − 20 cm and very acidic at depths of 100 − 120; ... 180 – 200 cm of the experiment (III). Us points that delimit the area the pH of the soil using 0.01 M CaCl 2 varies from 5.57 to 7.02 in the depth from 0 – 15 cm and at depth 15 – 30 cm ranges from 5.2 to 7.10. the soil in analysis is uniform, as the pH values ​​do not show a significant difference either in the profile as well as at the delimiting points of the area (TRADUÇÃO NOSSA)