Tropical, grass

Uses herbicide, rice, grass, tropical plantations Trade names Setoff (Ciba)... 

Most biomass species grow well in the United States at temperatures between 15.6 and 32.3°C (60 and 95°F). Typical examples are corn, kenaf, and napier grass. Tropical grasses and certain warm-season biomass have optimum growth... 

Land use changes in the tropics have resulted in a landscape characterized as a mosaic of logged forests, cleared fields, and successional forests. This results in the transformation from extremely fire resistant rainforest ecosystems to anthropogenic landscapes in which fire is a common event (16, 17), Fires occur in disturbed tropical forests because deforestation has a dramatic effect on microclimate. Deforestation results in lower relative humidities, increased wind speeds, and increased air temperatures. In addition, deforestation results in increased quantities of biomass that are susceptible to fire. This biomass may be in the form of forest slash, leaf litter, grasses, lianas or herbaceous species (16, 18). 

Hess, H. D., Beuret, R. A., Lotscher, M., Hindrichsen, 1. K., Machmiiller, A., Carulla, J. E., Lascano, C. E., and Kreuzer, M. (2004). Ruminal fermentation, methanogenesis and nitrogen utilization of sheep receiving tropical grass hay-concentrate diets offered with Sapindus saponaria fruits and Cratylia argentea foliage. Anim. Sci. 79,177-189. 

We can see that the Tropical Rain Green Forest ecosystems occupy about 1/5 of the African equatorial belt, whereas about 1/2 of this area is Woody and Tall Grass Savanna ecosystems. The rest of the area are occupied by various Dry Steppe and Dry and even Extra-Dry Desert ecosystems, like the Sahara, with annual rainfall less than 200 mm. As it has been mentioned above, the amount of precipitation is of high significance for exposure pathways of pollutants. 

Dry desert tropical ecosystems occupy 4.5 x 106 km2, or 3.0% of total land area of the Earth. These ecosystems have dry periods during 7-10 months a year. Not only trees, but also numerous grasses cannot grow in such severe conditions. The vegetation... 

Table VI. Required Amino Acids in Some Tropical Leafy Vegetables and Grasses [g Amino Acids/100 g Protein Adapted from Nagy et al., (4)]...

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