Harvesting

Content ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Introduction ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Good harvesting practices ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],At harvest the quality of rice is best. From then on it can deteriorate quickly:

Harvesting systems 1. Manual system ,[object Object],[object Object]

Harvesting systems 2. Manual cutting / machine threshing ,[object Object],[object Object],Optional: Winnowing or cleaning

Harvesting systems 2. Machine cutting / machine threshing ,[object Object],[object Object],[object Object],Optional: Winnowing or cleaning

Harvesting systems 4. Combine harvesting ,[object Object],[object Object],[object Object],[object Object]

When to harvest ,[object Object],[object Object],[object Object],[object Object],[object Object]

Manual cutting and hauling ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Mechanical reaping ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Manual threshing ,[object Object],[object Object],[object Object],[object Object]

Pedal thresher ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Wire loop threshing drum

Axial-flow thresher ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],produced in 9 different countries used by several 100,000’s of rice farmers across Asia Peg tooth threshing drum Axial flow principle

Winnowing ,[object Object],[object Object],[object Object],[object Object]

Cleaning ,[object Object],[object Object],[object Object],[object Object]

Combine harvesting ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Stripper harvesting ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Despite strong promotion in SE-Asia the stripper harvester has not gained wide popularity because of its problems in less favorable harvesting conditions

Losses during cutting ,[object Object],[object Object],[object Object]

Losses during threshing ,[object Object],[object Object],[object Object]

Recommendations for optimizing quality ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Tips for manual threshing ,[object Object],[object Object],[object Object]

Tips for machine threshing ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Setting threshing drum speed ,[object Object],[object Object],[object Object],[object Object],RPM Tip speed (m/s) for drum diameters of 30 cm 40 cm 50 cm 400 6.3 8.4 10.42 450 7.07 9.4 11.78 500 7.85 10.5 13.09 550 8.64 11.5 14.4 600 9.42 12.6 15.7 650 10.21 13.6 17.02 700 11 14.7 18.3 750 11.8 15.7 19.64 800 12.6 16.8 21 850 13.4 17.8 22.25 900 14.14 18.85 23.6

Setting concave clearance ,[object Object],[object Object],[object Object],[object Object]

Tips for good winnowing ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Harvesting

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