Abstract
Aiming to evaluate the spatial variability of soil moisture, an experiment was performed in the town of Pesqueira, Pernambuco State, on a carrot (Daucus carota L.) totalizing 96 days. Two irrigation sectors (1 e 2) were formed, each one with 900 m2 (30 x 30 m), adopting microsprinkler irrigation, using water of an “Amazonas well”. Twenty-three days after sowling (DAS) dead cover was added in sector 2. Water supply was based on the crop needs adding a leaching fraction of 20%. Access tubes for a neutron probe were installed to measure the soil moisture at the depths of 20 and 40 cm, at 49 points in sector 1 and 52 points in sector 2, in 5 x 5 m grid. The reading were performed an hour after the end of irrigation, twice a week, totalizing 20 days of monitoring during the crop. The data were evaluated for statistics and geostatistical methods. Sector 2 presented significantly higher moisture for two depths in almost all cycles. Spatial dependence was observed on all monitoring dates, sectors and dephts except sector 1(20 cm) from 23 to 40 DAS
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