The relationship of water-soluble carbon and hot-water-soluble carbon with soil respiration in agricultural fields

2012 ◽  
Vol 156 ◽  
pp. 116-122 ◽  
Author(s):  
Yoshitaka Uchida ◽  
Seiichi Nishimura ◽  
Hiroko Akiyama
Keyword(s):  
Soil Respiration ◽  
Water Soluble ◽  
Hot Water ◽  
Agricultural Fields ◽  
Relationship Of ◽  
The Relationship ◽  
Soluble Carbon

scholarly journals 257 LEAF PETIOLE NITRATE AND POTASSIUM LEVELS IN POTTED PLANTS GROWN AT THREE NITROGEN AND POTASSIUM LEVELS

HortScience ◽  
1994 ◽  
Vol 29 (5) ◽  
pp. 466e-466
Author(s):  
Erica M. Bergman ◽  
Michelle Marshal ◽  
Brian Weesies ◽  
Bill Argo ◽  
John Biernbaum
Keyword(s):  
Leaf Blade ◽  
Dry Mass ◽  
Hydraulic Press ◽  
Water Soluble ◽  
Leaf Petiole ◽  
Potted Plants ◽  
Petiole Nitrate Concentration ◽  
Soluble Fertilizer ◽  
Relationship Of ◽  
The Relationship

Twelve species of flowering potted plants were grown in a peat-based medium with water soluble fertilizer concentrations of 50, 100, or 200 mg·liter-1 N and K2O. Leaf blade or leaf petiole samples were collected six to eight weeks after planting. Sap was expressed using a hydraulic press and levels of nitrate nitrogen and potassium were determined using Cardy flat sensor ion meters. Petiole nitrate level ranged from 520 to 6300 mg·liter-1 and potassium levels ranged from 870 to 3600 mg·liter-1. The petiole nitrate concentration and change in petiole nitrate levels with changes in media nitrate levels was crop dependent. Leaf blade nitrate and potassium concentrations were lower than leaf petiole concentrations. The relationship of petiole nitrate to final plant fresh and dry mass and appearance at flowering will be presented.

THE AVAILABLE BORON CONTENT OF THE GENETIC HORIZONS OF SOME ONTARIO SOILS: I. THE RELATIONSHIP BETWEEN WATER-SOLUBLE BORON AND OTHER SOIL PROPERTIES

1966 ◽  
Vol 46 (2) ◽  
pp. 133-138 ◽  
Author(s):  
N. S. Miljkovic ◽  
B. C. Matthews ◽  
M. H. Miller
Keyword(s):  
Organic Matter ◽  
Boron Content ◽  
Organic Matter Content ◽  
Clay Content ◽  
Important Variable ◽  
Matter Content ◽  
Parent Material ◽  
Water Soluble ◽  
Hot Water ◽  
The Relationship

The available boron content of the genetic horizons of eight Ontario soils was determined using a hot-water extraction and a sunflower test. The available boron was highest in the surface horizons and decreased in the zones of eluviation to a level equal to or lower than that in the parent material. The content in the horizons was generally higher than that in the C horizons.The water-soluble boron was closely related to the organic matter content in a quadratic regression (R2 = 0.691). When pH and clay content were included in regressions, a positive organic matter × pH component was the single most important variable, explaining 64.4% of the variability. Additional terms involving clay content and pH did not greatly increase the R2 value.

scholarly journals Carbon fraction concentrations in a haplic Luvisol as affected by tillage

2014 ◽  
Vol 60 (No. 6) ◽  
pp. 262-266 ◽  
Author(s):  
J. Horáček ◽  
E. Strosser ◽  
V. Čechová
Keyword(s):  
Cultural Practices ◽  
Fulvic Acids ◽  
Soil Samples ◽  
Water Soluble ◽  
Hot Water ◽  
Protection Measures ◽  
Humus Substances ◽  
Conventional Ct ◽  
Soluble Carbon

Changes of soil organic matter (SOM) parameters were investigated in a haplic Luvisol with medium-heavy texture. Soil samples were taken from several layers at minimum (MT) and conventional (CT) tillage plots of a field experiment in Sitzenhof (Germany). All cultural practices except for tillage (crop rotation, fertilizing, protection measures, etc.) were identical over the whole time of the experiment. The concentrations of oxidizable carbon C<sub>ox</sub> and its constituents (humic acids (HA), fulvic acids (FA), and hot-water soluble carbon) are comparable in layers&nbsp;15&ndash;20 cm in both variants. In 0&ndash;15 cm and 30&ndash;55 cm layers, these concentrations were higher in the MT variant. A similar trend was observed in the colour quotient values of humic substances Q4/6, which indicates increasing condensation of humus substances (HS) at deeper layers in both variants, and it is also confirmed by a humic to fulvic acids ratio HA:FA. Concentrations of SOM fractions were higher (except 15&ndash;20 cm layers) in the MT than CT treatment throughout the profile, especially below the 30 cm depth. The SOM did not accumulate markedly in the surface layer of long-term MT treatment.

scholarly journals A method to determine mineralization kinetics of a decomposable part of soil organic matter in the soil

2011 ◽  
Vol 49 (No. 1) ◽  
pp. 8-11 ◽  
Author(s):  
L. Kolář ◽  
F. Klimeš ◽  
R. Ledvina ◽  
S. Kužel
Keyword(s):  
Organic Matter ◽  
Control System ◽  
Soil Organic Matter ◽  
Oxygen Demand ◽  
Water Soluble ◽  
Hot Water ◽  
Organic Contamination ◽  
Mineralization Kinetics ◽  
Kinetics Of ◽  
Soluble Carbon

A new method was proposed that complements the value of active carbon in the soil expressed as hot-water soluble carbon Chws. The method is based on vacuum measurements of biochemical oxygen demand (BOD) of soil suspensions using an Oxi Top Control system manufactured by the WTW Merck Company that is destined for hydrochemical analyses of organically contaminated waters. Measurements will provide BOD values for particular days of incubation; total limit BODt can be determined from these values, and it is possible to calculate the rate constant k1 of mineralization of a decomposable part of soil organic matter. It is typical of soil organic matter (SOM) of a given soil sample and comparable with the BOD5:COD (chemical oxygen demand) ratio that is used to evaluate degradability of water organic contamination in hydrochemical analytics.

scholarly journals Agroecological evaluation of interrelationships of soil properties in time and space

2021 ◽  
pp. 163-175
Author(s):  
V. I. Savich ◽  
V. V. Gukalov ◽  
A. E. Sorokin ◽  
M. D. Konakh
Keyword(s):  
Soil Properties ◽  
Mutual Influence ◽  
Chemical Properties ◽  
Farming Systems ◽  
Water Soluble ◽  
Soil Fertilization ◽  
Podzolic Soils ◽  
Physico Chemical ◽  
Relationship Of ◽  
The Relationship

This paper assesses the relationship between the physico-chemical and agro-chemical properties of sod-podzolic soils in the Moscow region and ordinary heavy-loamy chernozems in the Krasnodar region within the catenas and down the soil profile. Soil properties changed significantly through seasonal dynamics. From the end of April to the middle of June in the soil solution of sod-podzolic soils, the value of Eh varied from 534 to 759 mv, the ratio of NO3/NH4 – from 0.2 to 15.4; the content of water-soluble manganese – from 4.0 to 10.1. At the same time, there was a delay in change of soil properties, as humidity and temperature varied. It is shown that in different intervals of soil properties between individual indicators of fertility, the effects of synergism and antagonism are manifested. The degree of mutual influence of soil properties depended on both the degree of soil fertilization and the degree of their cultivation. Information relationships were manifested not only between the soil properties, but also between the processes. Temporary excessive moistening of the soil led to acidification of the soil in the washing type of water mode, and to alkalinization in the non-washing type. It is proposed to account for the relationship of soil properties with humidity, temperature, pH, and Eh to adjust the components of farming systems.

THE RELATIONSHIP OF WATER-SOLUBLE CATIONS TO FIELD SEPARATIONS OF CHERNOZEMIC AND SOLONETZIC SOILS

1963 ◽  
Vol 43 (2) ◽  
pp. 359-369 ◽  
Author(s):  
A. K. Ballantyne ◽  
J. S. Clayton
Keyword(s):  
Soil Samples ◽  
Soil Survey ◽  
Water Soluble ◽  
Saturated Soil ◽  
High Sodium ◽  
Low Sodium ◽  
Water Saturated ◽  
Relationship Of ◽  
The Relationship

It is suggested that cations present in extracts of water-saturated soil samples can be used to complement and substantiate the field classification of soils into the Solonetzic and Chernozemic Orders by the Canadian system, and that an evaluation of these cations together with pH can be used as substantiating criteria at the sub-group level.Two hundred and ninety-one profiles, sampled by the Saskatchewan Soil Survey during the 1959–61 seasons, have been separated into high, medium and low sodium profiles and on this basis correlated with the field classification. Most of the high sodium soils were in the Solonetzic Order, and the medium and low sodium in the Chernozemic Order.The proposed laboratory criteria gave over 80 per cent agreement with the field classification at the order level. This percentage was obtained from a range of 97 per cent for the Orthic Chernozem to 63 per cent for the Solonetz profile. The agreement at the lower level varied from 95 per cent for the Rego Chernozem to 38 for the Solonetz.

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