PLANTING AND TRANSPLANTING : Page 77
Balled-and-Burlapped Root Systems. Planting material is
often lifted with a ball of earth left intact around the roots. The ball
of earth after being lifted is then carefully wrapped with burlap.
This process is used with large material, evergreens, and any plants
that are difficult to move. The great danger of transplanting such
material after it has been wrapped for three or four days lies in the fact
that during this period the outer thin layer of earth on the ball
becomes hard and dry. The general practice with many planters has
been to plant the stock without further care after removing the burlap.