大定县十二区仲麦乡的三埧村,水塘乡的何家沟、辜家箐及九区的草坪乡等地属丘陵地区,土壤种类以灰泡泥(生草潜育灰化土)、黄泥火石(黄壤)、黑灰泡(黑色石灰土)、油沙土(紫色土)等为主。在灰泡泥及黄泥火石土中由于酸度大(pH 值4-4.5),土改前只种苡仁、草籽、毛稗等作物,玉 Dachang County, the second district Zhongmai Township, Sanjiao Village, Shuitang Township Hejiagou, Gu Jiajian and nine District Lawn Township and other places are hilly areas, the soil types to fly ash (grass sodden ash) , Yellow mud mud (yellow soil), dark gray foam (black lime soil), oil sand (purple soil) and so on. In ash mud and yellow mud Flint soil as a result of acidity (pH value of 4-4.5), land only before the species of yi, grass seeds, barnyardgrass and other crops, jade