搜索结果: 1-14 共查到“农学总论 organic matter”相关记录14条 . 查询时间(0.358 秒)
Characteristics of the Adsorption of Dissolved Organic Matter by Charcoals Carbonized at Different Temperatures
cedar wood Freundlich isotherm pH dependence rice-straw water
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2009/6/10
We investigated the adsorptive volume and rate, adsorption isotherm, and the pH dependence of charcoals obtained from carbonizing cedar (Cryptomeria japonica D. Don) wood chips at various temperatures...
Characteristics of organic matter in selected profiles from the Gezira Vertisols as determined by thermogravimetry
soil Vertisol organic matter Sudan thermogravimetry
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2008/12/2
Some properties of soil organic matter (SOM) in Vertisols were studied in four profiles from the South, Central and North Gezira of Sudan using Thermogravimetry. The characteristics examined include ...
Changes in soil organic matter, bulk density and tensile strength of aggregatesafter percolation in soils after conservation and conventional tillage
percolation process carbon distribution aggregates strength
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2008/11/26
The type of tillage in arable soils affects porosity of the soil and in consequence the hydraulic conductivity. The accessibility and mobility of organic carbon in arable soils can differ depending on...
Dynamics of organic matter in peat soil under the conditions of sand-mix culture during 15 years (a short communication)
peat soil organic matter sand-mix culture
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2008/11/24
The results of a 15-year investigation on the dynamics of organic matter in peat soil under the conditions of sand-mix culture (SMC) are presented. The generalisation of the obtained results show that...
Denitrification, organic matter and redox potential transformations in Cambisols
N2O emission N2O absorption redox po- tential soil respiration CO2:N2O ratio
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2008/11/21
Two greenhouse gases: N2O and CO2 as well as Corg and redox potential transformation were investigated. Fourteen Cambisols (0-10 cm) developed from sand, silt, loess, loam and clay characteristic for ...
Effect of management practices on soil organic matter, microbial biomass and aggregate stability of Orthic Luvisol
management practice organic matter microbial biomass aggregation
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2008/11/21
Because of the importance of soil organic matter (SOM) and wet aggregate stability (WAS) on soil quality, the maintenance of satisfactory levels of these parameters is an integral component of soil m...
Effect of soil compaction and organic matter on the early growth of maize (Zea mays) in a vertisol
vertisol organic matter compaction maize early growth
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2008/11/20
A laboratory experiment was conducted to determine the emergence and early growth of maize (Zea mays) seeds in a dark clay soil known as vertisol (Typic Pellustert). Three quantities of groundnut hau...
Emission of greenhouse gases and soil organic matter balance in different farming systems
organic farming greenhouse gases methane nitrous oxide
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2008/11/19
Estimation of the influence of different farming systems on emission of greenhouse gases (methane and nitrous oxide) was the aim of the research. The research was conducted on the basis of a special f...
Reduction in organic matter fractions and structural stability following cultivation of tropical forests in Ethiopia and Nigeria
organic matter aggregate stability tropical soils
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2008/11/12
The objectives of this study were: to assess changes in the organic matter (OM) fractions of the surface layer (0-20 cm) of the forested Ethiopian and Nigerian soils following their conversion to arab...
Relations between soil structure, number of selected groups of soil microorganisms, organic matter content and cultivation
soil structure microorganisms organic matter cultivation system
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2008/11/12
The aim of this work was to fiut relations between the number of selected groups of soil microorganisms, water stability of soil aggregates, soil porosity and the organic matter content on the basis o...
Seasonal changes in labile organic matter, mineral nitrogen, and N2O emissionin a loamy sand Orthic Luvisol cultivated under three management practices
labile organic matter mineral nitrogen N2O emission management practices growing period
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2008/11/12
Valid evaluation of soil quality requires better understanding of short- and long-term responses of key biochemical and microbiological soil properties to seasonal changes and types of management prac...
Soil colour and spectral analysis employing linear regression models I. Effect of organic matter
soil colour spectral analysis organic matter
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2008/11/12
This work comprises an investigation into whether soil reflectance spectral analysis which is employed to calculate the colour characteristics (hue, value, chroma) of soil can be carried out using lin...
OCCURRENCE OF SPECIES FAMILY CARABIDAE (COLEOPTERA) INDEPENCE ON THE INPUT OF ORGANIC MATTER INTO SOIL
Coleoptera Carabidae Harpalus rufipes
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2010/12/7
The aim of this work was to investigate the effects of different rates of organic fertilizers (farmyard manure and bio sludge) on occurrence of soil organisms with focus to species of family Carabidae...
Some biochemical aspects of Fragi-Stagnic Albeluvisols’ organic matter
Albeluvisols organic matter long-term field experiment organic and mineral fertilisation urease and nitrate reductase auxine crop yields
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2010/1/13
The concentrations of N-NH4+, N-NO3-, Ntotal, total (TOC) and water extractable (DOC) organic carbon, P, K, Ca, Mg, S, the activity of nitrate reductase, the activity of urease activity as well as ind...