Amaranthus retroflexus or redroot pigweed is a second generation lignocellulosic fuel. Each biomass sample (leaves, inflorescences and stems) was pyrolyzed in lab-scale furnace, nitrogen atmosphere under non-isothermal conditions at heating rates of 10 °C/min until the furnace temperature reached 550 °C. The pyrolysis characteristics three major components were also studied through thermogravim...

Plot-scale field studies were conducted to evaluate the efficacy of steam for the control of cropland weeds in comparison with common herbicides. Weed densities, biomass, or emergence after treatment were measured. Steam (3,200 kg/ha, energy dosage equivalent to 890 kJ/m2, speed of 0.8 m/s) and glyphosate (560 g ai/ha) gave similar control (. 90%) of seedling common lambsquarters and seedling r...

Effective weed management depends on correct control timing, which seedling emergence dynamics. Since soil temperature and moisture are the two main factors that determine germination, hydrothermal time model can be used to predict their emergence. The aim of this study was estimate base (Tb) water potential (?b) for germination Chenopodium album, Amaranthus retroflexus, Setaria pumila, Panicum...

abstract in order to study the effect of different organ extracts of fenugreek (trigonella gracum (on germination of some crops and weeds, an experiment was conducted in completely randomized design with 3 replications. factors included 4 species soybean (glysin max),sesame ( sesamus indicum) , pigweed (amaranthus retroflexus) and velvetleaf (abotilon teophrasti) and the extract of different fe...

The Amaranthaceae family is composed of about 180 genera and 2500 species. These common weeds have become increasingly relevant as triggers of allergy in the last few years, as they are able to rapidly colonize salty and arid soils in extensive desert areas. The genera Chenopodium, Salsola, and Amaranthus are the major sources of pollinosis from the Amaranthaceae family in southern Europe, west...

About one-third of the earth’s land area consists acidic soils. The rhizotoxic Al3+ is one primary constraints associated with low soil pH. Various Amaranthus species are important components weed flora in tea plantations on acid soils north Iran. In this study, four (A. blitoides, A. retroflexus, cruentus, and tricolor) were grown under hydroponic conditions total Al concentrations 0, 20, 50, ...

The influence of weed seed predation by invertebrates and vertebrates was examined in relation to distance from hedgerows in maize fields of southwestern Michigan. Experiments were conducted in spring and winter and included five common weed species, i.e., velvet-leaf (Abutilon theophrasti), redroot pigweed (Amaranthus retroflexus), common lamb's-quarters (Chenopodium album), fall panicum (Pani...