Silicon(Si) and oxygen(O)are the two most abundant elements in the earth's crust -27 percent and 47 percent, respectively These two elements along with lesser amounts of others, combine in different ways to form a huge array of minerals 土壤矿物元素组成主要是:氧、 硅、铝、铁,其它元素的量相对较 比较少。Silicon (Si) and oxygen (O) are the two most abundant elements in the earth’s crust -27 percent and 47 percent, respectively. These two elements, along with lesser amounts of others, combine in different ways to form a huge array of minerals. 土壤矿物元素组成主要是：氧、 硅、铝、铁，其它元素的量相对较 比较少