نتایج جستجو برای: population growth indices
تعداد نتایج: 1529931 فیلتر نتایج به سال:
Introduction: Population and its characteristics play an important role in planning and policy making and in defining economic and social goals. The purpose of this article is to examine the impact of population growth on the economic growth of meta-analysis. Method: The present study aimed to quantitatively combine the results of researches on the impact of population growth on econo...
abstract: the subject of the life satisfaction is one of the important issues in development economics literature. in this paper, the main determinants of life satisfaction such as economic factors have been considered. for data analysis, the indices of life satisfaction have been collected among 400 people in tehran and neibouring provinces by applying stratified random sampling method. then, ...
to estimate population density of the cabbage aphid, brevicoryne brassicae (l.), a stratified random sampling was conducted in two unsprayed canola fields in isfahan (central iran) during 2011-2012. population density was determined for apterous, and alates, as well as the total population, at two plant growth phases (pgp1: from plant emergence to the end of rosette, and pgp2: from the beginnin...
the life history of an acarid mite, tyrophagus putrescentiae (schrank), on fusarium graminearum clade was investigated at 25 â± 1â°c, 60 â± 5% rh and a photoperiod of 16: 8 (l: d) h. incubation period for egg hatch, larval and nymphal periods and adult longevity were 2.22 â± 0.06, 3.46 â± 0.12, 4.84 â± 0.16 and 10.05 â± 0.9 days, respectively. the average life span of males and females were 22....
abstract the lack of water is the most important problem in extensive landscape especially turfgrass in arid and semi arid regions. the root responses in native and commercial grasses under drought stress were investigated. this experiment was in a factorial experiment based on unbalanced completely random design on the year 2006. the specious that we used in this experiment included (i) commer...
spodoptera exigua (hübner) was studied in laboratory (25±1ºc, 60±5% rh, and 16:8 l:d h) exploring the antibiotic effects of 10 canola cultivars (sarigol, slm046, hayula420, rgs003, opera, okapi, licord, modena, zarfam and talaye) on its demographic parameters. the age-stage, two-sex and the traditional female age-specific life tables were constructed by using the demographic data. the larval pe...
World industrialization and population growth are the main reasons for the increase in environmental contamination with aromatic hydrocarbons. The presence of these compounds in the environment leads to a variety of stresses in plants and finally reduces their growth. Pyrene is one of the major toxic contaminants belonging to polycyclic aromatic hydrocarbons. Hence, in this research, the effect...
Root-knot nematodes cause physiological and anatomical disorders in plants. The present study contains the results of an investigation of the effect of Meloidogyne incognita race2 on the growth of roots and aerial organs of tomato under greenhouse conditions. The experiment in a completely randomized design split split plot on two susceptible (Falat Y) and tolerante (Gina VF) tomatoes variety w...
Introduction: Economic development and public welfare are some of macroeconomic goals for any country. Health economy is one of the parameters as criterion for action in evaluation of this important subject. The present study has been intended to investigate into the relationship among factors of health economy including total health expenditures (some percent of Gross Domestic Product GDP), li...
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