What’s the Crumb structure in soil?
First of all,let us understand the soil structure. The soil is a porous system.It consists of solid,liquid and gas three-phase substances.The solid material in the soil includes both mineral and organic matter.The liquid part refers to the moisture of the soil,which is preserved and moved between the pores of the soil and is the most active part of the soil. The gas part refers to the air of the soil and it is filled with pores that are not occupied by moisture.The pores are divided into three types: large,medium,and small.Among them,the large pores are called gas-filled pores.Large pores should not be too much,water is easy to run off if too much,and the pore size of small pores is too small,which is not conducive to the breathability and rooting of plants. Medium pores are also called water-holding pores.The more midium pores are more suitable for the growth of crops.Just like our human skin,the better the water retention and air permeability,the healthier it is. Crumb struc