Diversity, crop

Po, Italy 270,000 total 10,000 just rice It flows through an industrialized and highly cultivated plain which supports diverse crops [32]... 

In addition, naturally growing plants resist plant pathogen and Insect attack because resistance develops over time via natural selection (35). Also, most natural and crop plants have, as a part of their basic physical and chemical makeup, a wide array of mechanisms that help them resist pest attack. These Include chemical toxicants, repellents, altered plant nutrients, hairiness, thorns, and diverse combinations of these (35). 

Harris, D.S., Schapaugh, W.T. Kanemasu, E.T. (1984). Genetic diversity in soybeans for leaf canopy temperature and the association of leaf canopy temperature and yield. Crop Science, 24, 839-42. 

There are indications that the variety of C substrates in the rhizosphere soil is basically too wide to be significantly affected by changes in quality of plant residues from the previous crop. For example, legumes as preceding crop were shown to increase significantly microbial diversity in the bulk soil, as estimated by Biolog assay, whereas in the rhizosphere soil this effect of legumes could not be detected (145). 

N. Z. Lupwayi, W. A. Rice, and G. W. Clayton, Soil microbial diversity and community structure under wheat as influenced by tillage and crop rotation. Soil Biol. Biochem. 30 1733 (1998). 

Agriculture within the European region is diverse and can best be described by its diversity of crops, from the vineyards of France, to rice in Italy, and to the large expanse of glasshouses in The Netherlands. All of these situations require the use of approved pesticides to enable these crops to grow healthily in their situations. 

When planning a worker exposure/re-entry study, the number of sites selected should reflect the use pattern of the product. Usually three different sites, each in a different geographical location, are recommended to ensure good representation of the areas when the product has wide use. The different geographical locations offer the researcher diversity in equipment used to treat the crops as well as diversity in the work habits of the individuals in the study. 

Acetamiprid is a neonicotinoid insecticide with outstanding systemic activities and a broad insecticidal spectrum. Acetamiprid controls diverse soil and foliar insect pests infesting cotton, sugar beet, vegetables, fruits and other major food crops by both contact and stomach action... 

Once established, tea is not a very difficult crop to maintain. Some varieties withstand cold weather fairly well and this allows for a widespread growing area but with a primary requirement for adequate water. Tea can be successfully cultivated by the use of unsophisticated techniques, but also by the use of highly mechanized procedures. It is, therefore, viable in a wide diversity of economics. Tea is among the least expensive of beverages and can usually be provided at less than 0.03 per serving. 

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