Effects of transplanted seedling density and species on sward structure of native warm-season grass (NWSG) stands were compared in a randomized complete block design. About 6-week-old NWSG (big bluestem (BB, Andropogon gerardii Vitman), eastern gamagrass (GG, Tripsacum dactyloides L.), indiangrass [IG, Sorghastrum nutans (L.) Nash] and switchgrass (SG, Panicum virgatum) seedlings were transplan...

Writing about democracy, Walt Whitman said, “It is a great word, whose history, I suppose, remains unwritten because that history has yet to be enacted.” The word “diversity”— or the term “cultural diversity”—also has a history in Virginia that has yet to be enacted or actualized in some meaningful way. Clearly, a relationship between these two pieces of unfinished business exists, a relationsh...

This research project presents an effort to use entry texts and hyperlinks in personal weblogs to observe the variance of local culture reflected in American cities. By geocoding the blogosphere, this project indexes the location of personal weblogs. The hyperlink network among blogs in American cities is presented. Finally, maps of two keywords’ distribution among American cities are plotted. ...

Corn acreage has increased in recent years in Louisiana. Much of this is on mixed to heavy Mississippi River alluvial soils and to a lesser extent on loessial silt loams of the Macon Ridge. Each of these soil groups are unique in their phys­ ical and chemical characteristics and different management strategies may be required to produce optimal yield. Research has indicated that corn performs b...

Paralytic Shellfish Poisoning (PSP) toxins are annually recurrent along the Massachusetts coastline (USA), which includes many small embayments and salt ponds. Among these is the Nauset Marsh System (NMS), which has a long history of PSP toxicity. Little is known, however, about the bloom dynamics of the causative organism Alexandrium fundyense within that economically and socially important sy...

Soil compaction can affect crop growth and greenhouse gas emission and information is required of how both these aspects are affected by compaction intensity and weather. In this paper we describe treatments of compaction intensity and their effects on soil physical conditions and crop growth in loam to sandy loam cambisol soils. Soil conditions and crop performance were measured over three sea...

Description of the Dry Alder Complex Sitka alder (Alnus viridis ssp. sinuata) is the dominant species of the Dry Alder Complex, and willow (Salix spp.) is also present on some sites (Figure ). Characteristic understorey species are fireweed (Epilobium angustifolium) on sites mesic and wetter, and pinegrass (Calamagrostis rubescens) on sites drier than mesic (Kimmins and Comeau ). Thimbleb...

My colleagues and I have analyzed the age structure of four populations of giant sequoia (Sequoiadendron giganteum [Lindl.] Buchholz). We have found the following: (1) The amount of successful reproduction in a grove cannot be judged by the sizes of its trees. (2) Sequoia populations almost certainly were near equilibrium or increasing before the arrival of European settlers. (3) In this centur...

Calibrachoa (Calibrachoa  hybrida) is a popular annual ornamental that was introduced in the late 1990s by the greenhouse ornamental industry. Little is published about its interaction with pathogens commonly associated with greenhouse production. We report here for the first time the response of Calibrachoa to infection by pathogens that may be introduced in greenhouse production cycles throu...

for increasing cropping intensity, improving soil quality, and controlling erosion in the conventional fallow areas For most of a century, the wide spread practice of growing only (Papendick, 1998). However, research with spring crops, one crop every other year in a tillage-based wheat (Triticum aestivum L.)–fallow rotation has degraded soils and contributed to environmenand in particular with ...