نتایج جستجو برای: soil grain size

تعداد نتایج: 774776  

Journal: :Forensic science international 2005
Shari L Forbes Boyd B Dent Barbara H Stuart

Adipocere refers to a postmortem product which forms from body fat in the later stages of decomposition. Factors present in the surrounding decomposition environment will influence adipocere formation and may accelerate or retard the process of conversion. One such factor important in burial environments is the type of grave soil in which the burial has taken place. This study was conducted to ...

Journal: :Journal of hazardous materials 2011
Raheleh Malekian Jahangir Abedi-Koupai Sayed Saeid Eslamian

The increasing demands for environmental protection and sustainable food production require an increase in the use of natural and non-toxic materials for agriculture. In this study, the feasibility of using surfactant-modified zeolite (SMZ) in comparison with zeolite clinoptilolite (Cp) application to reduce nitrate leaching and enhance crop growth was investigated. The effects of size (millime...

Journal: :Advanced Powder Technology 2023

We experimentally examined the amount of water retention in a model soil composed aggregated glass beads. The was characterized by two size parameters: aggregates D and monomer particles (composing aggregates) d. In experiment, sprinkled on model-soil system that has an open top surface drainable sieve bottom. When exceeded threshold (retainable limit), draining flux balanced with flux. weight ...

2009
Ulrike Homberg Richard Binner Steffen Prohaska Vincent J. Dercksen Anja Kuß Ute Kalbe U. Homberg R. Binner S. Prohaska V. J. Dercksen A. Kuß U. Kalbe

We present a method to determine the geometric grain structure of gradated soil by means of X-ray micro-computed tomography and image processing. High-resolution tomographic images are acquired of sample material that is embedded in epoxy resin. Position and shape of coarseand medium-sized grains are computed by applying morphologic image operators. We compare the results of image processing wi...

Journal: :international journal of environmental research 2014
a.l. ananthapadmanabha r. shankar k. sandeep

in this study we report the rock magnetic properties of surface soil samples and their spatialvariability from the northernmost district of kerala to understand pedogenic processes and soil erosion. themagnetic signal is mainly from fine grained pedogenic magnetite as other sources like anthropogenic andlithogenic magnetite, bacterial magnetite and greigite are absent. the surface soil samples ...

2001
J. E. THIES P. L. WOOMER

Host legumes can enrich their immediate soil environment with rhizobia through rhizosphere effects. The extent to which this enrichment occurs, the specificity of the process and its interaction with soil management factors remain poorly described. In a series of field trials, we measured changes in the size of indigenous populations of Bradyrhizobium in response to cropping of host and non-hos...

2016
Fugen Dou Junel Soriano Rodante E. Tabien Kun Chen

The objective of this study was to determine the effects of water regime/soil condition (continuous flooding, saturated, and aerobic), cultivar ('Cocodrie' and 'Rondo'), and soil texture (clay and sandy loam) on rice grain yield, yield components and water productivity using a greenhouse trial. Rice grain yield was significantly affected by soil texture and the interaction between water regime ...

1999
S. Asseng H. van Keulen

APSIM Nwheat is a crop system simulation model, consisting of modules that incorporate aspects of soil water, nitrogen (N), crop residues, and crop growth and development. The model was applied to simulate aboveand belowground growth, grain yield, water and N uptake, and soil water and soil N of wheat crops in the Netherlands. Model outputs were compared with detailed measurements of field expe...

2008
Krzysztof Gondek

Since potassium is essential for plant nutrition, should this element be deficient in sewage sludge used for plant fertilization supplementary mineral potassium fertilization is necessary. The aim of the present study has been to evaluate the effect of fertilization with organic materials on maize yield, its potassium concentrations and the content of bioavailable forms of potassium in soil of ...

2016
Sarah E. Johnson-Beebout Johnvie Bayang Goloran Francis H. C. Rubianes Jack D. C. Jacob Oliver B. Castillo

Understanding Zn uptake dynamics is critical to rice grain Zn biofortification. Here we examined soil Zn availability and Zn uptake pathways as affected by genotype (high-grain Zn varieties IR69428 and IR68144), Zn fertilization and water management in two pot experiments. Results showed significant interactions (P < 0.05) between genotypes and Zn fertilization on DTPA (diethylenetriaminepentaa...

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