Penetration resistance dynamics of a Dark Red Latosol of Microregion of Goiania, State of Goias, Brazil

摘要

This study aims to evaluate soil moisture and bulk density effects on penetration resistance dynamics of Dark Red Latosol, located in the Microregion of Goiânia, Goias. Area under rotating pasture were sampled 1) in lines and 2) between lines; 3) pasture renewal area; 4) area under Central Pivot; 5) area under no-tillage and 6) forest. Penetrometry tests were done for three different soil moistures, and six undisturbed soil samples were collected in layers of 0-5 and 20-30 cm for determination of bulk density, soil moisture at field capacity, total porosity, and micro and macro-porosity. Soil use and management affected in a differentiated way, all analyzed soil attributes; penetrometry diagnosis test was efficient when accompanied by bulk density and soil moisture analysis; the Dark Red Latosol studied appears to offer a restriction on types of crops cultivated in areas under central pivot and in rotating pasture when soil presents low moisture.