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2006

Iowa State University

Agricultural Science

Series

Ecology Evolution and Organismal Biology

Articles 1 - 3 of 3

Full-Text Articles in Entire DC Network

Plant Species Effects On Diversity And Weed Invasion Resistance In Restored Grasslands, Brian J. Wilsey, David Losure Jan 2006

Plant Species Effects On Diversity And Weed Invasion Resistance In Restored Grasslands, Brian J. Wilsey, David Losure

Iowa State Research Farm Progress Reports

Native grasslands provide a multitude of benefits to society including forage production, wildlife habitat, and nutrient and CO2 sequestration. There has been continuing interest in restoring grasslands to maximize these multiple benefits within the conservation community. There are presently many ongoing prairie restoration projects, and many more are being started throughout Iowa. Warm-season grasses such as big bluestem, indian grass, switchgrass, little bluestem, or side-oats grama often dominate prairies. In western Iowa, all five of these species are dominant, at least in some patches of grassland. Diversity is what most people are most concerned with when they restore or reconstruct ...


Native Cover Crops: Effects On Weed Invasion And Prairie Establishment, Brian J. Wilsey, Andrea Blong Jan 2006

Native Cover Crops: Effects On Weed Invasion And Prairie Establishment, Brian J. Wilsey, Andrea Blong

Iowa State Research Farm Progress Reports

Planting cover crops to simultaneously establish native prairie seedlings and prevent weed invasion is an increasingly common management practice. The idea is based on the assumptions that the cover plant will act as a nurse plant to prairie seedlings and that it will have a positive effect on seedling recruitment by suppressing weeds and by lowering the harmful effects of high evaporation and light availability. Cover crops could also potentially reduce the amount of soil erosion that occurs during planting. However, the evidence supporting the benefits of cover crops is mostly anecdotal and has been challenged. Clearly, there is a ...


Biomass Production And Soil Respiration In Experimental Riparian Grass Filter Strips, James W. Raich, Germán Mora Jan 2006

Biomass Production And Soil Respiration In Experimental Riparian Grass Filter Strips, James W. Raich, Germán Mora

Iowa State Research Farm Progress Reports

Grass filter strips established between cropped fields and streams have many potential conservation benefits, including trapping sediments and runoff, providing wildlife habitat, transforming nitrogen in runoff waters, sequestering soil carbon, and enhancing soil tilth. In this study, we compared five species of grasses with respect to above ground biomass production and soil respiration (i.e., CO2 flux), the latter being a robust measure of total soil biological activity. The information may help landowners select the best grass species for planting in streamside filters and buffer strips.