نتایج جستجو برای: declines the organic matters

تعداد نتایج: 16111372  

Ferula pseudalliacea (Bitter asafetida) is an endemic medicinal plant grown in the center of Iran, which is used in pharmaceutical industries. There is less report about its habitat characteristics and distribution in Iran. So, this research was conducted to study the effects of topography and soil properties on distribution of this species in Yazd Province, Iran in 2016 and 2017. Two habitats ...

Journal: تعلیم و تربیت 2020
N. Yahyavi Gharehbaagh,

Theoretically speaking, among topics that need to be covered throughout the elementary school years, legal ones loom large. In order to determine the extent to which this coverage is actually present in elementary school textbooks, a set of 17 such books from among 51 in total, deemed appropriate for such matters to be covered in, was selected and content analyzed utilizing concepts related to ...

Journal: :Proceedings. Biological sciences 2011
Sarina Macfadyen Paul G Craze Andrew Polaszek Kees van Achterberg Jane Memmott

Recent declines in biodiversity have increased interest in the link between biodiversity and the provision and sustainability of ecosystem services across space and time. We mapped the complex network of interactions between herbivores and parasitoids to examine the relationship between parasitoid species richness, functional group diversity and the provision of natural pest control services. Q...

Journal: :Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research) 2012

Improving water use efficiency and soil properties are two major factors for sustainable development in desert areas. Therefore, this research aims to study the effectiveness of a biological hydrogel, plant vegetation layer, sand and barley straw with rain harvesting techniques through micro-catchment operation on some soil properties including pH, Nitrogen, Electrical conductivity, Sodium Abso...

2015

Relevance Concerns about the environmental impact of farming has increasingly been the focus of discussions in the EU. Croplands, a primary land use in Europe, have a significant impact on the environment (soil, water bodies, global climate, local biodiversity and human health). The use of fertilisers and pesticides associated with conventional farming may lead to pollution and/or climate chang...

Hedysarum flexuosum L. is an important forage legume with high nutritive value. The determination of forage production in natural habitats is the most important factor for grazing management. Studies on its habitat characteristics and distribution are scarce. This research was conducted in order to evaluate the extent of pheno-morphological diversity in natural populations of Hedys...

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