in line with an investigation regarding to evaluation of the compatibility of the asian pear cultivars with iran climatic conditions – currently being carried out at the horticultural department of tarbiyat modares university (tmu) – the present preliminary study was performed in two regions in isfahan. asian pear (pyrus serotina rehd.) cultivars (grafted on european pear seedling rootstocks) w...

Aim Climatic niche breadth (the range of climatic conditions that a species experiences over space and time) is a fundamental topic in ecology, biogeography and evolution. But what determines the climatic niche width of species? In 1967, Janzen suggested that climatic niche widths for temperature were determined by levels of seasonal fluctuation in temperature at each locality, such that niche ...

The harsh climatic conditions and paucity of potential pollinators on Southern Ocean Islands (SOIs; latitude 46°S-55°S) lead to the expectation that anemophily or self-fertilization are the dominant modes of plant sexual reproduction. However, at least some species have showy inflorescences suggesting biotic pollination or dimorphic breeding systems necessitating cross-pollination. This study i...

abstract: no doupt that the scientists paid attention to holy quran since coming off the prophet (pbuh ) and the topic that they placed great care is quranic system and its relationship with miracle that peaked when abd _ alghaher al _ jorjani whome drew from all springs which preceded and called for system idea and philosophized it by his logical approach and conscious thought . therefore this...

The problem of modern steppification separate territories the forest field Ukraine is considered. model region Middle lands Buh. aim to analyze main factors contributing development Lands Buh landscape, partially reveal mechanism their intra-regional action. To achieve goal, methods analysis and synthesis, modeling, natural-anthropogenic compatibility, GIS technologies, materials own research d...