نتایج جستجو برای: altitude and edaphic factors display a male
تعداد نتایج: 20450651 فیلتر نتایج به سال:
PREMISE OF THE STUDY Divergent edaphic adaptation can contribute to reproductive isolation and coexistence between closely related species, yet we know little about how small-scale continuous edaphic gradients contribute to this phenomenon. We investigated edaphic adaptation between two cryptic species of California wildflower, Lasthenia californica and L. gracilis (Asteraceae), which grow in c...
abstract: about 60% of total premium of insurance industry is pertained?to life policies in the world; while the life insurance total premium in iran is less than 6% of total premium in insurance industry in 2008 (sigma, no 3/2009). among the reasons that discourage the life insurance industry is the problem of adverse selection. adverse selection theory describes a situation where the inf...
abstract abstract of thesis (includes summary, goals, execution methods, and results) story “al-obnosat al-bayza” is one of the short stories from “hanna mineh” collection. this story is a selection of lives of some humans during a voyage together, each of them is a symbol of human nature (love, mind, kindness) and examine social, cultural, and political aspects of governing system, and it...
Defining, planting and domesticating of important medicinal plants is necessary due to reducing pressure on natural resources and conserving genetic resources. Therefore, it is essential to know the factors affecting on establishment and distribution of medicinal plants. Then, the present research, is done in order to modelling the distribution of the most important medicinal plant species in t...
BACKGROUND Studies on plant communities in the Amazon have reported that different hydro-edaphic conditions can affect the richness and the species composition of different ecosystems. However, this aspect is poorly known in the different savanna habitats. Understanding how populations and plant communities are distributed in these open vegetation areas is important to improve the knowledge abo...
Background: To determine the incidence and risk factors of acute mountain sickness (A - AMS) in pilgrims. Although it is well known that western trekkers suffer from acute mountain sickness (AMS) in other mountains, not much is documented about the incidence of AMS in the Damavand Mountains, Iranian population that go to high altitude and its related contributing factors. Materials and Methods:...
abstract previous researches have shown success of growth hormones usage on flower production increase, pod and prevention of abscission of them in some of the pulses. two tests were done, in order to find out the effects of growth hormones to on flower production increase, pod and chick pea yield composites in farmer conditions (2010-11) and green house conditions as factorial on the proje...
The forest structure and stand composition are controlled by several physiographic factors, because these factors play an important role in control the physical and chemical conditions of the environment, including access to light, soil moisture, and nutrients. In this study, the physiographic characteristics indices of the study area including landform index, terrain shape index and aspect slo...
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