Yantai humus agrotech co.,ltd

HUMUS IS VERY IMPORTANT BECAUSE IT ADDS CERTAIN SALTS TO THE SOIL. THESE SALTS ARE TAKEN UP BY PLANT ROOTS. PLANTS NEED THESE SALTS TO GROW AND REMAIN HEALTHY. SOIL WHICH IS LIGHT IN COLOR, SUCH AS SANDY SOIL, DOES NOT HAVE MUCH HUMUS. SOIL WHICH IS DARK IN COLOR, SUCH AS GARDEN SOIL, IS RICH IN HUMUS. 　SOIL IS A COMPLEX MIXTURE OF FRESH AND ERODED ROCKY MATERIAL, DISSOLVED AND REDEPOSITED MINERALS, AND THE REMAINS OF ONCE LIVING THINGS. THESE COMPONENTS ARE MIXED TOGETHER BY THE BURROWING OF ANIMALS, THE PRESSURE OF PLANT ROOTS, AND THE MOVEMENT OF MATER UNDERGROUND. 　THE TYPE OF SOIL, ITS CHEMICAL COMPOSITION AND THE NATURE OF ITS ORGANIC ORIGIN ARE IMPORTANT TO AGRICULTURE, AND THEREFORE TO ALL OUR LIVES. MANY DIFFERENT TYPES OF SOILS EXIST. SOILS VARY FROM ONE PART OF THE WORLD TO THE OTHER, DEPENDING ON THE CLIMATE. 　A SANDY SOIL IS LIGHT, AND WATER DRAINS THROUGH IT EASILY. IT ONLY CONTAINS A SMALL AMOUNT OF ORGANIC MATTER AND SO IT IS NOT VERY FERTILE. 　PEAT IS A DARK COLORED SOIL CONTAINING A LARGE PROPORTION OF HUMUS THAT COMES FROM THE PARTIAL DECAY OF BOG PLANTS. THIS SOIL TENDS TO RETAIN WATER. 　CHALKY SOIL IS THIN AND STONY AND DRAINS WATER QUICKLY. THE ORGANIC MATERIAL IT CONTAINS DECAYS QUICKLY, AND SO IT CONTAINS ONLY A SMALL AMOUNT OF HUMUS. 　CLAY IS A HEAVY SOIL AND WATER CANNOT DRAIN THROUGH IT. IT IS STICKY AND PLASTIC WHEN WET AND CAN CONTAIN MANY NUTRIENTS.  [ Click for details ]