What has the author Donald A Perala written?

Answer 1

Donald A Perala has written:

'Shearing restores full productivity to sparse aspen stands' -- subject(s): Aspen, Pruning

'Thinning strategies for aspen' -- subject(s): Aspen, Forest thinning

'Aspen sucker production and growth from outplanted root cuttings' -- subject(s): Plant propagation, Aspen

'A provisional assessment of triclopyr herbicide for use in Lake States' forestry' -- subject(s): Herbicides, Hardwoods, White spruce, Testing

'Regeneration and productivity of aspen grown on repeated short rotations' -- subject(s): Aspen

'Aspen in the north central States' -- subject(s): Aspen, Handbooks, manuals