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The maturation process of some vegetables depends on many factors, among the main ones are the amount of sunlight received in the form of infrared radiation, which is responsible for their growth, and the amount of water absorbed during the days, which plays a fundamental role in the biochemical process for the production of energy by the plant. Depending on the region, if the plant receives too little or too much solar radiation during the days and how it is irrigated determine its growth and production. This study aimed to analyze the performance of an automatic solar irrigator built with low-cost materials in a small beet crop, implemented in a region located 17 km from the city of Abaetetuba during the months of March, April, May, and June. The results showed that the irrigator had better performance in the month of June due to the balance between high temperatures (satisfying a Gaussian distribution) and the amount of water delivered. It was found that the performance of the solar irrigator, although satisfactory, did not have a good evaluation in the production of beets, thus it is not a determining factor in the production of this type of crop under the research conditions.
