Intergrated Forest Vegetaion Management: Options and Applications
Seeding grass and legumes to replace invading native species is a method of vegetation control that is being tried in a number of places in British Columbia. Limited control of herbaceous species has been achieved, but most trials have reported short term reductions in the growth of planted seedlings. Cover crops can also improve forage values if the right species are included in the seeding mix. They can accelerate organic matter accumulation on mechanically prepared sites and can also increase soil nitrogen fixation if legumes are included in the seeding mix. Choice of species for inclusion in a mix involves balancing species characteristics against the objectives of the seeding. Seeding should be timed to maximize seedbed qualities without compromising seedling performance. However, cover crops may not be necessary in a properly planned and implemented reforestation program. Cover crops are probably most effective against species that invade the site in the seed rain. They are probably least effective against invader species of root origin.
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