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Both species responded to increasing density by extreme plasticity and there was no density-induced mortality even at 3200 plants/m2. In wheat the pla...
Read moreIn a field experiment in central Sweden, shoots of 20-year-old Scots pine (Pinus sylvestris) were hand-pruned in 2 series, 1 with non-fertilized trees...
Read moreSeedlings and young trees of Pinus sylvestris were grown in outdoor fumigation chambers at 5 and 150 mu g SO2/m3 (approx.). The higher SO2 concn. redu...
Read moreWhen weather was favourable (warm, dry) for ovi-position by O. frit, the combined activity of predators and parasites was found to be inadequate to pr...
Read moreDescribes a study of seedling survival after simulated browsing (removal of the cotyledons of 3-day seedlings, or the leading shoots of seedlings 1-11...
Read moreTo estimate the effect of foliage at different positions in the profiles of kale crops on the rate of photosynthesis below it, crop LAI was varied by ...
Read moreIn competition experiments the suppression of Early Hybrid by F1 Selma was not eliminated by increasing nutrient supply levels up to several times the...
Read moreIn a study on the distribution of weed seeds in soil, seeds of lucerne and oilseed flax, which differ markedly in size, shape and seed-coat properties...
Read moreLoss of short-wave radiation by reflection from an irrigated maize crop grown for forage averaged 0.18 of the incident total short-wave radiation rece...
Read moreIn this paper, marine birds (38 species from Anseriformes (ducks and geese); Podicipediformes (grebes); Charadriiformes (gulls and auks); Suliformes (...
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