Análise dos impactos ambientais na fertilidade física de um argissolo vermelho amarelo sob diferentes tempos de cultivo em Mossoró-RN.

Abstract

The present work had for objective to analyze the enviromenntal impacts in the physical fertility of Haplusdalf under different times of cultivation. The soil samples was collected in a farm to distance 40 km of Mossoró, Rio Grande do Norte State. The areas had sampling considering 4 cultivation times, to know: native area and areas with 2, 2,5 and 3 years, in the layers of 0-20, 20-40, 40-60 cm. The laboratory methodologies were used according to EMBRAPA, (1997). The data had been submitted to the variance analysis, for test F, considering a completely randomized experimental design, in factorial 4 x 3 (4 cultivation times and 3 depths), with 3 repetitions. It had influence of the soil cultivation time for all the analyzed variables, except the flocculation degree. How much to the depth, the variables silt, particles density and the alone porosity and available water had been remained steady, independently of the soil cultivation time.