clear plastic mulch

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• Plastic mulch — is a product used, in a similar fashion to mulch, to suppress weeds and conserve water in crop production and landscaping. Certain plastic mulches also act as a barrier to keep methyl bromide, both a powerful fumigant and ozone depleter, in the… …   Wikipedia

• industrial polymers, major — Introduction       chemical compounds used in the manufacture of synthetic industrial materials.       In the commercial production of plastics, elastomers, man made fibres, adhesives, and surface coatings, a tremendous variety of polymers are… …   Universalium

• Hippeastrum — Taxobox name = Hippeastrum image caption = A Hippeastrum cultivar in flower regnum = Plantae divisio = Magnoliophyta classis = Liliopsida ordo = Asparagales familia = Amaryllidaceae genus = Hippeastrum genus authority = Herb. subdivision ranks =… …   Wikipedia

• environmental works — ▪ civil engineering Introduction       infrastructure that provides cities and towns with water supply, waste disposal, and pollution control services. They include extensive networks of reservoirs, pipelines, treatment systems, pumping stations …   Universalium

• Air well (condenser) — High mass air well of Belgian engineer Achile Knapen in Trans en Provence …   Wikipedia

• agricultural technology — Introduction       application of techniques to control the growth and harvesting of animal and vegetable products. Soil preparation       Mechanical processing of soil so that it is in the proper physical condition for planting is usually… …   Universalium

• Glossary of environmental science — This is a glossary of environmental science.Environmental science is the study of interactions among physical, chemical, and biological components of the environment. Environmental science provides an integrated, quantitative, and… …   Wikipedia

• Hemp — This article is about industrial hemp. For its psychoactive variant, see Cannabis (drug). For the biology of the plant, see Cannabis. For other uses, see Hemp (disambiguation). The variety of appearances for cannabis. Only C. sativa (left) is… …   Wikipedia

• Tropical agriculture — Worldwide more human beings gain their livelihood from agriculture than any other endeavor; the majority are self employed subsistence farmers living in the tropics. While growing food for local consumption is the core of tropical agriculture,… …   Wikipedia

• Earth Sciences — ▪ 2009 Introduction Geology and Geochemistry       The theme of the 33rd International Geological Congress, which was held in Norway in August 2008, was “Earth System Science: Foundation for Sustainable Development.” It was attended by nearly… …   Universalium

• Outline of forestry — See also: Index of forestry articles The following outline is provided as an overview of and guide to forestry: Forestry – the art and science of managing forests, tree plantations, and related natural resources. Forest ecosystems have come to be …   Wikipedia