نتایج جستجو برای: neutral soils
تعداد نتایج: 131289 فیلتر نتایج به سال:
The resilience of microbial functions like carbon (C) and nitrogen (N) cycling to stress is likely heavily dependent on pH. Past research, however, has been limited laboratory manipulations or a pH gradient resulting from differences in soil mineralogy. In this study, soils were collected >50-year field trial where plots have maintained at 4.9, 6 7.1. We selected copper (Cu) heat represent pers...
For the development of measures for rational use soils, an agrochemical assessment soils is important. The purpose research was to establish dynamics changes in soil fertility indicators Chernivtsi region during 2011-2020. In our work were used laboratory and field methods, analysis generalization. samples, reaction environment, humus content, nitrogen content easily hydrolyzable compounds, mob...
[1] Plant productivity in upland tundra and boreal forest is demonstrably limited by nitrogen (N) and indirect evidence from field studies suggests that decomposition by soil microbes may be similarly limited. As climate warms at high latitudes, understanding the response of soil organic matter (SOM) decomposition to increased soil temperature may be crucial for determining the net effect of wa...
Nine pedons of alluvial origin in the Lower Niger River floodplains Nigeria were examined for morphogenesis, physicochemical properties, mineralogical composition, and heterogeneity parent materials. The soils stratified with redoximorphic features observed different layers reaching A-horizon subsurface grayization. Soils that received annual enrichment found to be structurally weak while other...
Soil characteristics and methanogenesis were investigated in Fluvisols of the Balandra lagoon mangrove in Baja California, Mexico in March/April 1995. The grain size distribution was dominated by the silt fraction (54-92%), sand and clay contents were 6-44% and 0-19%, respectively. Bulk density was 0.6-1.5 g cm, the water content 290-690 ml 1 and the air content 38-200 ml 1. The soils always sh...
Microbes are widely distributed in soils and play a very important role in nutrient cycling and ecosystem services. To understand the biogeographic distribution of forest soil bacteria, we collected 115 soil samples in typical forest ecosystems across eastern China to investigate their bacterial community compositions using Illumina MiSeq high throughput sequencing based on 16S rRNA. We obtaine...
The distribution of 32 per/polyfluoroalkyl substances (PFASs) in surface soils was determined at 62 locations representing all continents (North America n = 33, Europe n = 10, Asia n = 6, Africa n = 5, Australia n = 4, South America n = 3 and Antarctica n = 1) using ultra performance liquid chromatography tandem mass spectrometry (UPLC-MS/MS) systems. Quantifiable levels of perfluoroalkyl carbo...
Acidic soils often have high concentrations of dissolved aluminium (Al) and iron (Fe) in their solutions. The objective of this study was to determine potential solid phases controlling dissolved A1 and Fe concentrations in pyritic (FeS2) soils undergoing oxidation.. Soil samples were extracted with distilled-deionised H20 after reacting for 14,21 and 28 days (d) at 25fl"C. Soil water extracts ...
This work has focused on the possibility of being able to consider the behavior of the caprock, such as a layer of cohesive soil that absorbs and transfers the displacement due to the expansion of the aquifer subject to the action of the flow of CO2 at high pressure, but lower than the overburden of the geological formations overlying the caprock. Assuming a caprock saturated unconfined lateral...
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