VARIABILITY OF SOIL PROPERTIES IN RELATION TO THE YIELD AND QUALITY OF BUCKWHEAT
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The objectives of this study were to assess the relationship between soil properties and both the yield and quality of buckwheat and to facilitate the transfer of knowledge for enhancing buckwheat production to local communities. An exploratory research design was employed, involving 50 farmers in Nakok Village, Phu Fa Subdistrict, Bo Kluea District, Nan Province, selected via purposive sampling from plots where the Taiwan 01 buckwheat variety was being promoted. After harvesting, composite soil samples were collected for physical and chemical analysis, and buckwheat yields and seed quality were evaluated. Findings showed that buckwheat yields varied widely, from 25-233 kg/rai, corresponding to organic matter contents between 1.03-2.85% and available phosphorus levels of 2.13-25.23 mg/kg. The available phosphorus range of 2.13-10.28 mg/kg was sufficient for producing seeds with favorable sizes and weights. Yield was positively correlated with soil organic matter and available phosphorus: plots yielding less than 100 kg/rai showed positive correlation with available phosphorus, while those exceeding 100 kg/rai correlated positively with organic matter. Knowledge transfer was given to targeted 20 members of the Nakok Village Buckwheat Community Enterprise who previously struggled with low yield and poor product quality. The participatory process raised farmers' awareness and enabled collaborative design of site-specific solutions, leading to research uptake and practical implementation within the community. Following adoption, average yields increased to 225 kg/rai, with a total production of 1,575 kg, which was further processed into dried soba noodles and buckwheat tea. This research provided guidance for soil management and selection of suitable cultivation sites, supporting the application of research findings to sustainable community-based product development and economic enhancement in the highland regions of northern Thailand.
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