نتایج جستجو برای: saline and alkaline region
تعداد نتایج: 16899144 فیلتر نتایج به سال:
the quest for power has formed much of the world history especially in 20th and 21st centuries. oil (energy) particularly after industrial revolution has been a tool for conquest and power and has been transformed to a geopolitical issue. from a geopolitical point of view this has been the case for the last two centuries in central asia and caucasus. central asia and caucasus has always been...
BACKGROUND Although semi-arid and arid regions account for about 40% of terrestrial surface of the Earth and contain approximately 10% of the global soil organic carbon stock, our understanding of soil organic carbon dynamics in these regions is limited. METHODOLOGY/PRINCIPAL FINDINGS A field experiment was conducted to compare soil organic carbon dynamics between a perennial grass community ...
seismic retrofit strategies have been developed in the past few decades following the introduction of new seismic provisions and the availability of advanced materials and methods. it can be observed that new approaches to deal with more lateral forces are more innovative and more energy absorbent. in line with this, there is a growing trend toward the use of steel shear walls as a system with ...
Biochar soil amendments are attracting attention as one strategy to improve microbially ecological environment and regulate the nitrogen cycle. This study aimed evaluate effects of biochar application on agricultural improvement, (N) mineralization nitrification. The experiment was carried out a typical farmland containing black saline-alkaline in Northeast China. Four treatments were undertake...
The Malek Siah Kuh igneous complex of is located about 35 km north of Zahedan and among the villages of Lar down, Qarqoruk and Horamak. According to the results of rock naming diagrams, the volcanic rocks of Malek Siah Kuh complex have a combination of basaltic andesitic and trachyandesitic and its plutonic rocks show a combination of granodiorite and diorite. Using field studies and lithologic...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید