H3-FH-9-A flender planetary gearbox catalogue Helical gear Reduction Box H3

Flender/Flender Gear Units/Helical gear Reduction Box H3

er Harvesting and Threshing 6 Fig. 2 Effect of DAS or DAF on yield and grain moisture for paddy, chickpea, and soybean. (From Refs. 9, 1, 1.) Fig. 3 Effect of moisture content at harvest on head yield and milling yield of IR-8 variety of paddy. (From Ref. 2.) 6 Datta specic range of grain moisture. Therefore, delayed harvesting beyond the critical range of moisture content (2% for IR-8 variety of paddy) will reduce net recovery of grain.As suggested by the researchers, the recommended range of the CPH, the grain moisture,and the harvest duration for cereal and pulse crops are presented in Table 1. It serves asthe guideline for the harvesting of common crops. The sowing date, crop variety, and climate will bring considerable variation in the CPH, harvest duration, and the grain mois- ture. Any unscheduled rain of short duration will not only delay the CPH by 2 days,but will also result in the shattering of grain as well as loss and deterioration of grainquality. In light of the foregoing discussion, it is apparent that the crops must be harvested within limited time span (harvest duration) for specic variety. Use of mechanical harvestersfast cutting of crops, with reduced human drudgeryis therefore essential and preferred so that the harvesting is over within the specied period when the optimumgrain moisture range prevails. Delayed harvesting, either because of unpredictable weather and pilferage or nonavailability of labor, especially during peak months of harvest, will Table 1 Critical Period of Harvest and Range of Grain Moisture for Cereal and Pulse Crops Grain Harvest moisture duration Crop Critical period of harvest (DAF) (%) (days) Refs. Paddy 2 2.0.0 6 1,1,1 2 2.0.0 5 1 (Ratna, Jaya, Pankaj) 2 2.0.0 8 1 (Jaya) 2 2.0.0 7 1 (Jaya, dry season) 2 2.0.0 7 1 (Jaya, wet season) 1 2.0.0 9 1,1 (Ratna) 1 2.0.0 9 1 (Pankaj) 1 2.0.0 9 1,1 (Pusa Wheat 2 2.0.0 4 5,6,1 Chickpea 9a3.0.5 9 9,1 (Short-duration, Vijaya) 1a2.5.5 9 9,1 (Long-duration, - Soybean 8a3.4.5 7