The genus Stipa is one of the largest genera Poaceae. phylogeny still poorly resolved, and main problems linked to extensive inter intrasectional hybridization. Disclosure hybridization processes a key understanding relationships between species within genus. During floristic study in feathergrass steppe ecosystems central Asia, we found challenging specimens with an interesting combination mor...

to assess the effects of livestock grazing on soil compaction (density changes), the trampling action of livestock was simulated. the research field was located to the south west of nazarabad in savojbolagh district, south west of tehran province. samples were annually collected based on a completely randomized design. from the triple regions (reference, key and critical) 36 cylindrical cores w...

The research presents the problem of liquidation dumps substandard raw materials zeolite-containing rocks Holinsky deposit, measures for reclamation disturbed lands. most effective way to restore ecosystems is renaturation. Time intervals succession are considered. Renaturation lands consists 6 stages. Possible dominant plants proposed options considered in detail: Stipa lessingiana, Poa platen...