Abstract
`Redchief Red Delicious'/MM.lll (Malus domestica Borkh.) apple trees were grown for 12 years in six vegetative covers: rye mulch (RM), bare soil (BS) maintained by herbicides, mechanical cultivation (MC), tall fescue (TF), Kentucky bluegrass (KB) and nimblewill (NW). Apple root distribution was determined using the trench profile method. A trench two meters long and one meter deep was dug perpendicular to the tree row, 80 cm from both sides of the tree. One meter square grids, sectioned into 10 cm squares, were placed on the profile walls and root diameter and number were recorded. Trees grown in RM had the highest number of roots, greater than all other covers, followed by BS. MC and NW had fewer roots than BS. However, MC and NW were higher than KB and TF. KB had fewer roots than all covers except TF. TF had the lowest number of roots.
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