(2) Root system sampling <br>Select the shallow root system with straight and slender target tree for excavation, classify, trim and moisturize according to the diameter level, then seal the device into the refrigerator for cold storage.
(2) Root sampling<br>Select the shallow root system of the target tree straight and thin, and after sorting, pruning and moisturizing according to the diameter level, seal the device into the refrigerator for cold storage.
(2) Root sampling<br>Select the straight and thin shallow roots of the target tree to excavate, classify, trim and moisturize according to the diameter, and then put them into the refrigerator for cold storage.<br>