Search
All content is free for everyone to browse, read and share. You’ll find journal articles and non-peer reviewed grey literature. Type keywords into the search box or Use the filtering options below to browse the content.
Showing 733 results
In order to predict the optimum weeding period, a realistic estimate is needed of the size, timing and duration of a flush of weed emergence in a crop...
Read moreThis work contains abstracts of the ongoing research investigations of the United States Geological Survey (USGS) Cooperative Fish and Wildlife Resear...
Read moreThe identification of species, communities, or ecosystems that are likely to be strongly damaged by human activities (i.e. that are fragile) forms an ...
Read moreDensity-dependent mortality was shown to occur among the parasitic stages of Boophilus microplus (Can.) on European and Zebu X European breeds of catt...
Read moreThe most broadly applied generalizations of bioeconomics were derived from simple, non-spatial models. We develop a simple continuous spatial model in...
Read moreM. sativa cv. du Puits and Europe plants contained 2 populations of stems originating from either axillary or crown buds which differed in their rates...
Read moreCollembola and Acarina populations in grass/legume pastures that were grazed continuously with sheep at three stocking intensities were sampled at six...
Read moreLarge-scale destruction of ecosystems caused by surface mining provides an opportunity for the study of colonization processes starting with primary s...
Read moreA mathematical model is described that was developed to relate observed egg sterility in insects to other parameters of mating and reproduction, for u...
Read moreA study in young lodgepole pine forest near Prince George, BC, Canada, from 1979 to 1983 during the late increase, peak and decline phases of the Lepu...
Read more