Energy analysis of major crops in Thailand
1985
Pramot Kammueng
In 1984, 245 farmers from eight provinces in three regions (North, Northeast and Central Plain) of Thailand were interviewed to collect information on energy inputs in the production of five major crops, namely, rice, maize, sugarcane, cassava and cotton, and crop yields to compute energy output/input ratios. These farmers were classified in three categories, namely, animal power tiller and tractor farmers. Energy from human, animal and mechanical sources used in performing all field operations from land preparation to harvesting (including threshing) and material inputs as seeds, fertilizers and chemicals, were included in energy inputs. Energy output/input ratio for rice varied from 14.9 for tractor culivated farms in Northeast to 3.9 for power tiller farms in the Central Plain. Energy ratio for maize for tractor farms in all three regions were almost the same varying from 7.7 to 8.3. For the Northern region for animal and power tiller farms these ratios were 11.7 and 12.1 respectively. Most of the sugarcane farmers used tractors and energy ratio varied from 3.5 to 4.7. All cotton farmers interviewed used tractors and energy ratio varied from 1.9 to 2.5. The energy ratios were the highest for cassava farmers using tractors in the Central Plain (37.7) and power tiller farms in the northern region (18.2)
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