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seeds of Rumex obtusifolius L. and Silene noctiflora L. germinated more slowly in total darkness than after a short exposure to light, whereas there were no significant differences for Cerastium fontanum Baumg. This suggests that seedling e...
agriculture result in the increasing in the concentration of the nitrate, sulphate, phosphate and pesticides (Libra, et al. 1986,1987; Robert, et al, 1998; Molerio, et al 1998; Ramón et, al. 1998; Pertti et, al. 1999; Alice et, al. 1999; An...
the European Community. An excess of food production and an increase of wealth enables different but less efficient forms of agriculture to survive. However organic agriculture is different to other current forms such as conventional agricu...
Organic Pollution and Its Effects on Fresh Water Overview Agricultural, industrial and domestic factors are the main causes of pollution of fresh water. Pesticides and other chemicals, even if they are directly discharged into rivers and la...
design of retaining projects. Table of Contents Abstract2 Introduction4 Statement and Solution Method of the Problem6 Effect of Backfill Soil on the Retaining Wall Response9 Analytical Studies12 Behavior of soil retaining walls on deformabl...
chemical species and measuring their distribution. Sometimes, it is used to indicate that a method gives more information on the form in which the element is present than other more commonly applied techniques (e.g., measuring distinct orga...
organic or inorganic, natural or synthetic, which supplies one or more of the chemical elements required for the plant growth". The cheapest and most common fertilizer would be manure. Manure, or faces, is a natural fertilizer. It is a mixt...