نتایج جستجو برای: soil micro flora
تعداد نتایج: 313392 فیلتر نتایج به سال:
In 1923 a 20-year experiment was begun in an effort to gain information on the following points: (1) The factors that influence the longevity of Azotobacter when introduced into a soil from which it is normally absent; (2) the effect of introducing and maintaining an Azotobacter flora in such a soil upon the crop-producing abihty and the nitrogen balance of the soil. The recent comprehensive su...
OBJECTIVE To determine the best method of identifying core tonsillar flora. STUDY DESIGN Quasi-experimental study. PLACE AND DURATION OF STUDY ENT Department, Combined Military Hospital, Lahore, from September 2013 to October 2015. METHODOLOGY Eighty-seven patients of recurrent tonsillitis undergoing tonsillectomy were included. All the patients, after being anaesthetised, had surface swa...
The soil contamination by heavy metals is one of the environmental problems of the world, with deleterious effects on the fauna and flora of soil and groundwater contamination, in addition to reducing plant growth and yield by entering the food chain, it puts human health and other organisms in denger.Cadmium is one of the hazardous and carcinogenic pollutions that in natural ecosystems ratio ...
Application of micro-piles to stabilize unstable slopes has been widely considered in recent years. A micro-pile is a small-diameter (typically less than 300 mm), drilled, and grouted as non-displacement pile that is typically reinforced. The main objective of this study is to evaluate the influence of the micro-pile group on increasing safety factor as well as finding the optimum position of m...
background: lemon verbena (lippia citriodora h.b.k.) is an aromatic and medicinal plant of family verbenaceae, which cultivated in north region of iran. objective: evaluation of phytochemical characters in lippia citriodora h.b.k. plantlets affected by propagation methods (micro-propagation and stem cutting) cultivated in different soil type (peat moss and mixture soil). methods: this study was...
− Nutrient acquisition by plants occurs in an environment characterized by complex interactions between roots, micro-organisms and animals, termed the rhizosphere. Competition for mineral elements in this sphere is high. The rhizosphere processes are driven by photosynthetically fixed carbon released by roots either directly to mycorrhizal fungal symbionts or as exudates fuelling a wider spectr...
This study deals with the determination of various topographic parameters and characteristics of micro & macro nutrient of soil sample existing in the Sandhari nala watershed. The specific locations of various soils sampling area situated at different villages of watershed were identified using Global Positioning System (GPS). Soil samples collected from different locations of the watershed wer...
Life in desert soil is marked by episodic pulses of water and nutrients followed by long periods of drought. While the desert flora and fauna flourish after rainfall the response of soil microorganisms remains unclear and understudied. We provide the first systematic study of the role of soil aqueous habitat dynamics in shaping microbial community composition and diversity. Detailed monitoring ...
Earthworms are essential detritus feeders that play a vital role in the process of decomposition of organic matter and soil metabolism. They are referred to as indicators of soil health. The complex process of partial breakdown of organic matter and mixing with mucous and gut microbial flora in the form of earthworm cast results in the enhancement of soil fertility status. They influence the so...
objective: soil organic carbon has been the most important soil quality measurement factors and has intense relation with soil physical, chemical and biological characteristics. organic matter and its components are important factors of soil aggregates constitution and stability and play significant role in its structure. so, this research has been done for achieving this purpose. methods: this...
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