Surveying Household - Based Diversity in Wet - Rice Fields at Daka, Xishuangbanna, Yunnan The Current Status of Upland Rice Varieties Diversity in Xishuangbanna--A Case from Baka , Daka and Mannalong Villages Agrobiodiversity Assessment and In - situ Conservation Household - Based Agrobiodiversity Assessment of 3 - year Fallow Field in Daka, Xishuangbanna, Yunnan