Sedges

Analysis Pure ceUulos e Pine wood Kentuck y bluegrass Giant brown kelp Feedlo t manur e Urban refuse Primary sewage sludge Reed sedge peat Illinois bituminous coal... 

Cyperus rotundus L. is a weedy species, native to India, but widely distributed in countries on the Pacific Rim and islands in the Pacific Basin. Commonly referred to as purple nut sedge, it has been known in the Hawaiian Islands since the middle of the nineteenth century. In addition to its weedy nature, the taxon has attracted attention because of the antifebrile activity of its rhizomes. Chemical studies have disclosed the presence of several sesquiterpene derivatives, some of which have been implicated in the plant s medicinal use (cyperene and cyperinerol) (Wagner et ah, 1990, p. 1399). Our interest in this species is the existence of several chemotypes with interesting patterns of occurrence involving Pacific Rim countries and several oceanic islands, including the Hawaiian Islands, islands in the southern Pacific, and the Philippines. 

Fig. 6.4 Compounds 536-541, sesquiterpene derivatives from Cyperus, the nut sedge...

F. S. Chapin 111, L. Moilanen, and K. Kielland, Preferential use of organic nitrogen for growth by a non-mycorrhizal arctic sedge. Nature 56/ 150 (1993),... 

Most plant species are able to absorb and assimilate nitrate, ammonium, urea, and amino acids as nitrogen sources, but the response to a particular form of nitrogen varies from species to species (114). For example, optimal growth of tomato roots occurs in soil with a ratio of nitrate to ammonium of 3 1 and is inhibited if the ammonium concentration is too high (115). By contrast, white spruce has a strong preference for ammonium (116), whereas some arctic sedges prefer amino acids (117). 

Sulfentrazone is a broad-spectrum, pre-emergent herbicide that provides good control over broadleaf weeds, grasses and sedges in crops and turf. The metabolism of sulfentrazone in animals and plants is similar. The major plant metabolite of sulfentrazone is 3-hydroxymethyl sulfentrazone (HMS). The soybean tolerance of 0.05 mg kg includes residues of sulfentrazone plus its major metabolite, HMS. The rotational crop tolerance includes residues of sulfentrazone and its major metabolites, HMS and... 

Holm et al. state that across the world about 200 weed species are involved in 95% of man s weed problems as related to food production (2). They list 80 species as primary weeds and 120 species as secondary weeds. The United States has seventy percent of the world s worst weeds 24% of these are grasses, 67% broadleaf weeds, and 7% sedges. 

Shoots and roots of the common cattail (Typhia latifolia) and water sedge (Carex aquatilis) were collected and analyzed to examine the passage of arsenic into the plants. 

Concentrations of As are significantly greater in roots of cattails (<1200 mg/L dry weight (dw)) and sedges (<3000 mg/L dw) than in shoots, probably due to adhering soils and sediments, which contain <6800 mg/L As. Both cattails and sedge plants contain significant As in live (<138 mg/L) and dead (<235 mg/L) shoots. 

Ernst WHO, Vis RD, Piccoli F. Silicon in developing nuts of the sedge Schoenus nigricans. J Plant Physiol 1995 146 481 —488. 

Sponheimer, M., Lee-Thorp, J., de Ruiter, D., et al. (2005). Hominins, sedges, and termites new carbon isotope data from the Sterkfontein valley and Kruger National Park. Journal of Human Evolution 48 301-312. 

Marshes are herbaceous freshwater, non-peat-producing wetlands dominated by grasses, sedges or reeds. The distinction between swamps and marshes may be blurred. 

Bentazone Acid 25057-89-0 2.55 1972 Herbicide A postemergence herbicide used for selective control of broadleaf weeds and sedges (a weed) in beans, rice, com, peanuts, mint, and others... 

Materials. The peat, taken from St. Louis County, Minnesota, is derived from mosses of the genus Sphagnum. It also contains remains of some ericaceous shrubs and few forbs and sedges. It was air-... 

Fig. 5.2. Relationship between optical density at 465 nm and concentration of ash-free sedge peat fulvic acid.

In the later version of this introduction Forman stated at the outset that if a sick person or his or her representative volunteered a diagnosis, this information should be disregarded the astrologer should have asked the series of questions at the beginning of a consultation, and these would enable him to determine the causes of the affliction.As Forman stated succinctly late in his life, ther is no true way to knowe a mans disease by his water, pulse, sedge or talk, but by... 

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