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agriculture Buriram Province calcium carbonate cassava Chaiyaphum Province coconut conducted the experiments Cropping Systems direct sown rice Dong-Saimool dry soil early planting farm practices farmers in Amphur farmers in Northeast fertilizer forest grandis growing season growth and development harvest household increase innovative farmers insuavis intercropping interplanted interview irrigation kenaf Khon Kaen Province Khon Kaen University Kranuan labour land area land preparation large paddy bund main root management practices mungbean Northeast Thailand nutrients paddy field peanut pepper plant growth planting material planting method Polthanee practices and knowledge pre-rainy season Pterocarpus macrocarpus Pugnam rain rainfed condition Research result rice bean rice crop rice production rice seedling rice transplanting satisfactory yield scientists seed germination sesame soil layers soil moisture soil surface sowing Srivicha stem base stem rot sugarcane Surin Province Tongchan traditional cropping pattern tree planting tree species tuber yield upland crops village water buffalo water stress waterlogging weeds yambean