نتایج جستجو برای: environmental areas in districtand regional levels
تعداد نتایج: 17122167 فیلتر نتایج به سال:
Over the past two decades, degradation damage has increased in natural ecosystems. This research focuses solely on the degradation of soil and vegetation cover in Sorkheh Eshpar National Park. For this purpose, some physical properties of the soil (specific gravity and true porosity, moisture content, a percentage of pebbles, acidity and conductivity and soil texture) were measured. Also, the d...
in one pole of the continuum of language learning, theoreticians and practitioners traditionally consider english as english as a second language or english as a foreign language. however, in the other pole of this continuum where english is thought of as the most effective tool for international communication, it is referred to as a lingua franca. those who favor an approach to english growing...
Background and Objective: Studies have shown that the presence of standard amount of fluoride in drinking water can prevent tooth decay. Meanwhile, higher concentration than permitted amount in drinking water causes bone disease and dental fluorosis. Given the importance of fluoride in drinking water and also GIS ability in spatial analysis of various factors in the groundwater, in this study t...
Needless to say, one of the outstanding areas in training activities is that of gaining skills, knowledge and minors needed for performing or improving job duties. Therefore, senior managers working in the governmental sector need to be trained as well though their training principles are different from that of other managerial levels. This paper tries to study and assess the training needs of ...
Lack of awareness of the critical factors involved in production of plants and sometimes, the cultivation of plants in areas unsusceptible to plant, can increase the amount of chemical fertilizer consumption in order to compensate the subsequent reduction of plant yield. This would increase environmental pollution. Thus, identifying of suitable areas where could supply plants initial needs of t...
To evaluate environmental changes in the Antarctic Ocean, concentrations of organochlorines (PCBs, DDTs, HCHs, HCB and CHLs) were determined in the blubber of the mature males of Antarctic minke whales, Balaenoptera bonaerensis, (from 21 to 25 years) from the Antarctic Areas IV and V. The ranges of concentrations for each compound were, in ng/g fat wt: PCBs, 7.7-89; DDTs, 29-340; HCHs, 0.20-4.3...
Sugar maple (Acer Saccharum Marsh.) damage resulting from a severe ice storm was modeled and mapped over eastern Ontario using preand post-storm Landsat 5 imagery and environmental data. Visual damage estimates in 104 plots and corresponding reflectance and environmental data were divided into multiple, mutually exclusive training and reference datasets for damage classification evaluation. Dam...
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