一个拖拉机手,几乎天天要和土壤打交道,可是你了解土壤吗?你知道,为什么有的土壤易耕,有的土壤又难耕呢?例如粘土地,“天晴似钢刀,落雨一团糟,干时耕不动,湿时粘犁头”。而含砂过多的沉板田,在犁耕时并不费劲,但是在手插秧时却很困难,正是“插秧如钉钉,薅田似溜冰,割稻象赛马,没甚好收成。”为什么不同的土壤会有不同的表现呢?追根问底,是因为土壤里面的颗粒大小不一样。拜访土壤之家土壤之家到底有哪些成员呢?我们不妨把土壤放到显微镜或放大镜的下面。这样,我们就会看到土壤里面有许多白色半透明的石英颗粒、亮晶晶的白云母、肉红色的长石等大小不同的矿物质颗粒,另外还可看到黑色的腐殖质颗粒。这些都是土壤固相部分的成员,其中的矿物质是土壤的骨骼,有机质则是土壤 A tractor hand, dealing with the soil almost every day, but do you know the soil? Do you know why some soil is easy to tillage and some soil is hard to tillage? For example, , Dry when plowing, sticky plow when wet “. The overgrown sinking plate field is not laborious in plowing, but it is very difficult when it is planted with rice. It is exactly like planting rice nails, . ”Why do different soils behave differently? The bottom line is because the size of the particles in the soil is different. Visiting the Soil House What is the home of the soil home? We might as well put the soil under the microscope or the magnifying glass. In this way, we can see that there are many white translucent quartz grains in the soil, shiny mineral mica, flesh pink feldspar and other different sizes of minerals, in addition to see the black humus particles. These are members of the solid phase of the soil, where the minerals are the bones of the soil and the organic matter is the soil