In the period following wolf (Canis lupus ) reintroduction to Yellowstone National Park (1995 /2004), the northern Yellowstone elk (Cervus elaphus ) herd declined from /17 000 to /8000 elk (8.1% yr ). The extent to which wolf predation contributed to this decline is not obvious because the influence of other factors (human harvest and lower than average annual rainfall) on elk dynamics has not ...

The long-term response of total soil organic carbon pools (‘total SOC’, i.e. soil and dead wood) to different harvesting scenarios in even-aged northern hardwood forest stands was evaluated using two soil carbon models, CENTURY and YASSO, that were calibrated with forest plot empirical data in the Green Mountains of Vermont. Overall, 13 different harvesting scenarios that included four levels o...

Barramundi (Lates calcarifer) is an important Queensland commercial fishery that exhibits dramatic inter-annual fluctuations in catch which, according to fishers, are explained in part by variations in the climate. Traditionally, modelling of fisheries harvest has focussed on the development of surplus production/yield models which use catch and effort data, and more complex age-structured mode...

Vicia includes several economically useful food and forage legume crops. Among these, are Vicia sativa (common vetch) and Vicia narbonensis (Narbon vetch). The present study was carried out to evaluate seventeen lines of V. sativa and six lines of V. narbonensis for adaptability and yield under Riyadh conditions. Parameters studied included days to flowering, days to maturity, plant height, see...

The aim of the current study was to investigate if there are any health effects of long-term consumption of organically grown crops using a rat model. Crops were retrieved over two years from a long-term field trial at three different locations in Denmark, using three different cultivation systems (OA, organic based on livestock manure; OB, organic based on green manure; and C, conventional wit...

This manual is only partially complete and is a work in progress. A completed manual will be available by January 1,2000. Cluster and TreeView are Y2K Compliant because they are oblivious of date and time.

Intake of phytosterols (and -stanols) has been shown to decrease the level of low-density lipoprotein cholesterol and thus protect against development of cardiovascular diseases. Therefore, studies on the cultivar and year-to-year variation in phytosterol content in rye grains have been performed. The phytosterol content and composition of different rye cultivars, grown under identical conditio...

OBJECT Improved precision fertilization by introducing sensors and remote control to secure fruit yield and reduce nutrient leaching in soil culture. MATERIAL AND METHODS We broadcasted before bedding and mulching 50 g m-2 of a multi-mineral fertilizer. Beds had two plant rows 20 cm apart, with plant distance of 25 cm. Experimental design was split plot with three replications and three treat...