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Tiba, Chigueru; Ghini, Raquel. Predictions of monthly accumulated hours of soil temperature in solarized soils. 2005 SOLAR WORLD CONGRESS, 2005, Orlando, Flórida.
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Número de Trabalhos: 9 (Nenhum com arquivo PDF disponível)
Citações: Nenhuma citação encontrada
Índice h: Indice h não calculado  
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Abstract

Solarization is a soil disinfestation method that uses solar energy to achieve the control of pests, diseases, and weeds. The method consists of covering the soil with a transparent polyethylene film before planting, for a period lasting from one to two months. Solarization efficiency is dependent upon choosing an adequate season of the year when it is to be used. A simplified numerical procedure has been developed to estimate monthly hours of accumulated temperature in solarized soils, thus allowing the selection of a suitable season for the trea tment to be implemented. The proposed modeling requires the monthly means of daily solar irradiation and maximum air temperature as input data, and a daily profile of temperature variation, admitted to be sineshaped. The procedure was verified using observations made during the years of 1992-93 in Jaguariúna, SP. Generally, there exists good agreement between calculated and measured data. The calculated number of accumulated hours with maximum daily temperatures higher than 35°C in the solarized soil during the period from November to April differed by 20% at most from the observed number of hours. For temperatures higher than 40°C, the estimates for the period from November to March were different from the observed values by 24% at most. The evolved procedure can predict, with good precision, the monthly temperature hours in solarized soil, down to a 10 cm depth, in the region for which it was developed; for other localities, however, it must be evaluated and verified.
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