二、 TThe mineral constitutes in the soil Primary mineral formed from cooling the molten(lava) rock. (The silicate and aluminosilicates are main compositions in the primary mineral 2 The feldspar and quartz are main mineral in the primary minera 3 The primary mineral is an important source of the plant nutrient二、The mineral constitutes in the soil Primary mineral formed from cooling the molten(lava) rock. ①The silicate and aluminosilicates are main compositions in the primary mineral. ② The feldspar and quartz are main mineral in the primary mineral. ③The primary mineral is an important source of the plant nutrient