Paddy sundrying studies
1989
Gayanilo, V.G. (Philippines Univ., Los Banos, College, Laguna (Philippines))
Results show that the optimum grain thickness for sundrying is 2-4 cm. Frequent mixing of the sundried paddy at 30-minute intervals resulted in high milling and headrice recoveries, more uniformly dried grain, and faster drying time. Paddy variety, initial moisture content, and solar radiation intensify at the final drying stage from 16 to 14% moisture content were found to influence the headrice potential of sundried paddy. Basic data on solar radiation requirements for paddy sundrying and a computerized programme for determining the probability of occurrence of daily solar radiation were developed and used in the evaluation of the probability of success of paddy sundrying in any given region in any given weekly period. The tractor-mounted implement developed for mechanizing sundrying operation was found to be more efficient and cost effective than the manual method of spreading, turning and mixing and piling of paddy on concrete pavements. Results of these studies provide useful information for improving sundrying techniques and developing schemes and strategies for safe sundrying practices that will reduce paddy spoilage and lead to better milling quality.
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