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In the eastern Brazilian Amazon, logged forests frequently include patches where liana density is particularly high. In these so-called liana tangles,...
Read moreSeeds of Poa annua, P. trivialis and Festuca rubra were sown into gaps within established Lolium perenne swards, planted in systematic pattern to give...
Read moreSexual reproduction in 9 clones of Eichhornia crassipes from different parts of the world was examined in the glasshouse. Eight of the clones flowered...
Read moreSexual reproduction and natural seed production in Eichhornia crassipes was examined in a total of 19 populations from 2 tropical regions (Lower Amazo...
Read moreResistance against pesticides is a widespread and increasing problem. The control of pesticide dose and the mixing of pesticides have been proposed as...
Read moreAtrazine-resistant or -susceptible biotypes of Senecio vulgaris and Amaranthus retroflexus were compared with regard to DM production, resource alloca...
Read moreGrowth characteristics and response to atrazine were studied in atrazine resistant (R) and susceptible (S) populations of Amaranthus retroflexus and A...
Read moreIn the laboratory, seeds of Hordeum geniculatum, H. glaucum, H. leporinum, H. marinum and H. murinum showed some innate dormancy which was most eviden...
Read moreThe vegetation types in 1-m2 permanent quadrats were determined annually in 1975-82 on low and moderate productivity sites of improved or unimproved F...
Read moreIntraspecific variation in susceptibility to simazine was examined in 46 different populations of Senecio vulgaris collected from various fruit growin...
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