Investigating the responses of trees to the heterogeneous distribution of nutrients in soil and simultaneous presence of neighboring roots could strengthen the understanding of an influential mechanism on tree growth and provide a scientific basis for forest management. Here, we conducted two split-pot experiments to investigate the effects of nutrient heterogeneity and intraspecific competitio...

BACKGROUND Until recently, a lot of arable lands were abandoned in many countries of the world and, especially, in Russia, where about half a million square kilometers of arable lands were abandoned in 1961-2007. The soils at these fallows undergo a process of natural restoration (or self-restoration) that changes the balance of soil organic matter (SOM) supply and mineralization. RESULTS A s...

Introduction. The lexical system of any language consists a great deal terminology. Consisting many subsystems organized by different domains, the economic terminological is complex nature. Moreover, new English terms describing phenomena and processes are increasingly coming into existence. Due to fact that development constantly improving, study terminology formation remains pressing.

In order to evaluate the effects of parent material on clay mineralogy in northface of the Elborz mountain area that is covered with deciduous trees, five mountain physiographical units with dolomite, sandstone, marl, limestone and conglomera parent material were selected and in each physiographical unit some soil profiles were studied. Soil samples were taken from different horizons and leyers...

One of the processes that may play a key role in plant species coexistence and ecosystem functioning is plant-soil feedback, the effect of plants on associated soil communities and the resulting feedback on plant performance. Plant-soil feedback at the interspecific level (comparing growth on own soil with growth on soil from different species) has been studied extensively, while plant-soil fee...

Biodiversity of soil fungi was explored in soils of the National Park of Urmia Lake. For this purpose, 46 soil samples were collected from 5–15 cm depth and isolation was made using soil dilution plate and Warcup soil plate methods. Fungal isolates were identified based on cultural and morphological criteria. The results obtained in this study revealed that there is a rich diversity among hypho...