THE ROOTS INSIDE THE SOIL FIX THE PLANT AND ABSORB WATER AND FOOD MATERIALS FOR IT
GOOD SOIL SHOULD CONTAIN A SUITABLE AMOUNT OF SAND,CLAY AND SOME DEAD PLANT AND ANIMAL MATERIALS。
THE SAND ALLOWS THE AIR TO FLOW THOUGH THE SOIL SO THAT THE ROOTS CAN BREATHE。
THE CLAY KEEPS THE WATER IN THE SOIL FOR THE ROOTS TO USE。
THE DEAD PLANT AND ANIMAL MATERIALS CONTAIN FOOD MATERIALS SO THE PLANTS CAN GROW
不要机器!!!
谢谢先..
等到9点.
快点救命很急!!!!!