نتایج جستجو برای: percentage of soil organic matter som
تعداد نتایج: 21239642 فیلتر نتایج به سال:
The soil lipid fraction can play an important role in the sorption of organic compounds. In this study, the impact of the lipid fraction of freshwaterand wastewater-irrigated soils on the sorption of nonand relatively polar compounds was assessed. Lipid analyses revealed a clear difference between the two lipid fractions. The lipid extract from the wastewater-irrigated soil was consistent with ...
introduction: estimation of cation exchange capacity (cec) with reliable soil properties can save time and cost. pedotransfer function (ptf) is a common method in estimating certain soil properties (e.g. cec) that has been wieldy used for many years. one of the common techniques that have been used to develop ptfs is multiple linear regressions. in this method, all easily obtained soil properti...
Ectomycorrhizal fungi are thought to have a key role in mobilizing organic nitrogen that is trapped in soil organic matter (SOM). However, the extent to which ectomycorrhizal fungi decompose SOM and the mechanism by which they do so remain unclear, considering that they have lost many genes encoding lignocellulose-degrading enzymes that are present in their saprotrophic ancestors. Spectroscopic...
Soil organic matter is an important resource that has to be managed properly. The CCB model is a tool to simulate SOM dynamics basing on very few input data that are usually available for agricultural sites. This paper gives a short overview about the model, describes the CCB database and refers to the CCB interfaces with databases like EuroSOMNET and BEFU.
the C/N ratio is used to characterize living and dead organic matter. The total C accumulated in biomass is Increasing atmospheric CO2 concentrations, and widespread deposition of N to terrestrial ecosystems has increased the focus on soil generally limited by the availability of N. Forest trees C and N pools. The aim of this study was to estimate the size and are often adapted to N limited con...
The high levels of soil organic matter (SOM), frequently found in soils with large content of noncrystalline minerals, are traditionally considered the result of strong organo-mineral interactions. Amorphous oxides are likely to provide active sites for SOM sequestration at the colloidal level. Considering that preservation of SOM is favoured by adsorption of humic colloids onto mineral surface...
Due to its recalcitrance against microbial degradation, biochar is very stable in soil compared to other organic matter additions, making its application to soils a suitable approach for the build-up of soil organic carbon (SOC). The net effects of such biochar addition also depend on its interactions with existing organic matter in soils. A study was established to investigate how the status o...
Soil organic matter (SOM) is essential for preserving a healthy soil that provides good structure and high fertility water -holding capacity [...]
درک الگوی توزیع مکانی ماکروفون خاک بدلیل اثرات آن روی فرآیندهای اکوسیستم بسیار مهم است. لیکن اطلاعات کمی در این خصوص وجود دارد. درمورد تنوع زیستی ارگانیسم ها وجانداران خاکزی که ازاجزای مهم وکلیدی درهرسیستم اکولوژیکی هستند و در بهبود حاصلخیزی خاک و تولیدات زمین وپایداری اکوسیستم ها(ازطریق فرآیندهای بیولوژیک)نقش عمده دارند تحقیقات کمی انجام شده است. این تحقیق جهت بررسی الگوی مکانی پارامترهای تنوع...
There is uncertainty about the mechanisms responsible for producing the rewetting CO2 pulse. One proThe rapid rewetting of a dry soil often yields a pulse in soil CO2 posed mechanism is that the pulse of CO2 is largely a production that persists for 2 to 6 d. This phenomenon is a common occurrence in surface soils, yet the mechanism responsible for producresult of the mineralization of nonbioma...
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