Archive | Earthworms

Endogeic and Anecic Earthworm Abundance in Six Midwestern Cropping Systems

ABSTRACT Endogeic and juvenile anecic abundance was measured in soil samples and anecic populations were studied by counting midden numbers at the sites of two long-term cropping systems trials in South-central Wisconsin. The three grain and three forage systems at each site were designed to reflect a range of Midwestern USA production strategies. The primary objectives [...] More »

Earthworm Ecology in Agriculture: 1990 and 1991 Data from the Wisconsin Integrated Cropping Systems Trial

Earthworms are considered biological indicators of soil health (Curry and Good, 1992; Daugbjerg et al., 1988; Lavelle et al., 1989). They have significant effects on soil chemical, physical, and biological properties and processes. Conversely, soil properties, climate, and agricultural practices affect earthworms (Figure 7). Soil physical and chemical limiting factors include organic matter content and [...] More »

Earthworm Populations at the Wisconsin Integrated Cropping Systems Tria

Many farmers, organic gardeners, and researchers have recognized earthworms as important organisms contributing to “healthy” soils (Romig et al. 1995). Earthworms are frequently associated with their ability to mix the soil (Cook and Linden 1996, Marinissen and Hillenaar 1997), increase rates of water infiltration (Bouche and Al-Addan 1997, Linden et al. 1991, Zachmann et [...] More »

Earthworm populations on the WICST Plots (1999-2001)

In this study, our primary objective was to determine the effect of crop rotation on earthworm abundance. Two types of earthworms are found on the WICST plots: topsoil-dwelling and subsoil-dwelling (night crawlers) species. Authors: Jon Simonsen, Martha Rosemeyer, and Josh Posner More »