Effect of spatial variability on the estimation of the soluble salt content in a drip-irrigated saline loam soil

1989 ◽  
Vol 15 (4) ◽  
pp. 361-376 ◽  
Author(s):  
J.H. Moolman
Keyword(s):  
Spatial Variability ◽  
Salt Content ◽  
Soluble Salt ◽  
Loam Soil

EFFECT OF METHOD OF IRRIGATION ON THE DISTRIBUTION OF SALTS IN A CHIN LOAM SOIL

1963 ◽  
Vol 43 (1) ◽  
pp. 65-69
Author(s):  
E. H. Hobbs ◽  
G. C. Russell
Keyword(s):  
Salt Content ◽  
Sprinkler Irrigation ◽  
The Other ◽  
Soluble Salt ◽  
Additional Water ◽  
Loam Soil ◽  
Irrigation Practices

Fields of Chin loam soil, one irrigated by sprinkler methods and the other by surface methods, were sampled to a depth of 5 feet. Analysis of the samples showed the soluble salt content of the sprinkled field, at all depths sampled, to be consistently higher than that of the surface-irrigated field. It is suggested that present sprinkler irrigation practices in this area should be modified to provide additional water for leaching purposes.

SPATIAL VARIABILITY OF SOLUBLE SALT CONTENT IN A MANCOS SHALE WATERSHED

Soil Science ◽  
1978 ◽  
Vol 126 (6) ◽  
pp. 342-349 ◽  
Author(s):  
R. J. WAGENET ◽  
J. J. JURINAK
Keyword(s):  
Spatial Variability ◽  
Salt Content ◽  
Soluble Salt ◽  
Mancos Shale

LEACHING FRACTIONS AND SALT STATUS OF TWO IRRIGATED GYPSUM-RICH SOILS IN SOUTHERN ALBERTA

1982 ◽  
Vol 62 (1) ◽  
pp. 97-103 ◽  
Author(s):  
C. CHANG ◽  
S. DUBETZ ◽  
T. G. SOMMERFELDT ◽  
D. C. MacKAY
Keyword(s):  
Crop Production ◽  
Irrigation Management ◽  
Salt Content ◽  
Accurate Information ◽  
Southern Alberta ◽  
Total Soluble Salt ◽  
Loam Soil ◽  
Leaching Fraction ◽  
Consumptive Water

A method for calculating the fractions of water leached through the profile (leaching factor) in irrigated soils high in gypsum was developed. The method requires data on long-term changes in the salinity status of the soil profile, and is based on the principle that water moving through gypsum-rich soils becomes saturated with gypsum. The average total soluble salt content of two soils to a depth of 180 cm has decreased logarithmically since 1917. The average Ca content has decreased linearly at rates of 0.091 and 0.097 meq∙100 g−1∙yr−1 in a clay and clay loam soil, respectively. A leaching fraction 0.16, as obtained by our method, is similar to that calculated from a water balance procedure. However, the latter method required accurate information on the annual rate of irrigation and precipitation and consumptive water use by the crops grown. The results indicate that irrigation management at the two sites has provided sufficient leaching water to reduce the total soluble salts and to actually improve the suitability of the sites for crop production.

Corrigendum - Frequency of annual species of Medicago on the major soil groups of the Mcquarie region of New South Wales

1960 ◽  
Vol 11 (5) ◽  
pp. 705
Author(s):  
WD Andrew ◽  
FW Hely
Keyword(s):  
New South ◽  
New South Wales ◽  
Salt Content ◽  
Acid Group ◽  
Soluble Salt ◽  
Annual Species ◽  
South Wales ◽  
Soil Groups ◽  
Soil Habitat ◽  
Poor Drainage

The frequency of eight annual species of Medicago was determined on 10 soil groups in a region climatically favourable for medics. They occurred on nine of these, the overall frequency being in the order M. minima (L.) Bart. > M. denticulata Willd. > M. laciniata (L.) Mill., M. praecox DC., M. tribuloides Desr., and M. orbicularis (L.) Bart. > M. arabica (L.) Huds. and M. confinis Koch. M. minima was more tolerant of variation of soil habitat than any other medic in the region. M. denticulata was most commonly found on the soils of high soluble salt content and showed the greatest tolerance of poor drainage conditions. M. laciniata occurred in greatest abundance on soils of the well-drained brown acid group. M. praecox was most commonly found on soils with a compact gravelly surface. M. tribuloides was recorded on five soil groups but was common only on the black earths. M. orbicularis was confined to the black earth and red loam soils. M. arabica was rarely found, being restricted to lower, fertile, well-drained parts of the landscape, and M. confinis occurred only occasionally and then in association with M. denticulata.

scholarly journals Prediction of Seasonal Frost Heave Behavior in Unsaturated Soil in Northeastern China Using Interactive Factor Analysis with Split-Plot Experiments and GRNN

Water ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1587 ◽  
Author(s):  
Wan ◽  
Bian ◽  
Wu ◽  
Sun ◽  
Wang ◽  
...  
Keyword(s):  
Water Content ◽  
Salt Content ◽  
Northeastern China ◽  
Soluble Salt ◽  
Frost Heave ◽  
Future Research ◽  
Saline Soils ◽  
Controllable Factors ◽  
Split Plot ◽  
Interaction Factors

Abstract: Few studies of frost heave mechanisms have considered multifactor interactions, particularly in unsaturated saline soils typical of northeastern China. We collected soil samples in western Jijin Province and assessed their potential frost heave behavior with reference to four controllable factors: soluble salt content (CSS), compactness (C), temperature (T), and water content (WC) using a two-level split-plot experiment. The resulting frost heave ratio was between −0.6% and 2.1%. Analysis of variance showed that water content, compactness, and temperature had significant effects on frost heave behavior, with water content having the strongest correlation (factor coefficient of 0.82), while content of soluble salt (CSS) had no significant effect. The interaction factors (products of single factors) CSS × WC and C × WC had significant effects on frost heave behavior. A correlation analysis using these interaction factors with experimental data drawn from previous research showed results consistent with the improved frost heave experiment as the significant effects of single factors on frost heave behavior ranked from WC > C > T and the interaction factors CSS × WC and C × WC gain had significant effects. We then established two generalized regression neural network (GRNN) models based on the single and interaction factors in order to predict frost heave behavior, showing that adding the latter to the input dataset improved the model accuracy. Thus, future research on predicting frost heave behavior in unsaturated saline soils should consider multiple interacting factor for greater accuracy.

Frequency of annual species of Medicago on the major soil groups of the Mcquarie region of New South Wales

1960 ◽  
Vol 11 (5) ◽  
pp. 705
Author(s):  
WD Andrew ◽  
FW Hely
Keyword(s):  
New South ◽  
New South Wales ◽  
Salt Content ◽  
Acid Group ◽  
Soluble Salt ◽  
Annual Species ◽  
South Wales ◽  
Soil Groups ◽  
Soil Habitat ◽  
Poor Drainage

The frequency of eight annual species of Medicago was determined on 10 soil groups in a region climatically favourable for medics. They occurred on nine of these, the overall frequency being in the order M. minima (L.) Bart. > M. denticulata Willd. > M. laciniata (L.) Mill., M. praecox DC., M. tribuloides Desr., and M. orbicularis (L.) Bart. > M. arabica (L.) Huds. and M. confinis Koch. M. minima was more tolerant of variation of soil habitat than any other medic in the region. M. denticulata was most commonly found on the soils of high soluble salt content and showed the greatest tolerance of poor drainage conditions. M. laciniata occurred in greatest abundance on soils of the well-drained brown acid group. M. praecox was most commonly found on soils with a compact gravelly surface. M. tribuloides was recorded on five soil groups but was common only on the black earths. M. orbicularis was confined to the black earth and red loam soils. M. arabica was rarely found, being restricted to lower, fertile, well-drained parts of the landscape, and M. confinis occurred only occasionally and then in association with M. denticulata.

Experimental study on the washing characteristics of fly ash from municipal solid waste incineration

2021 ◽  
pp. 0734242X2110682
Author(s):  
Mi Yan ◽  
Jiahao Jiang ◽  
Rendong Zheng ◽  
Caimeng Yu ◽  
Zhihao Zhou ◽  
...  
Keyword(s):  
Fly Ash ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Salt Content ◽  
Waste Incineration ◽  
Soluble Salt ◽  
Chloride Salt ◽  
Municipal Solid Waste Incineration ◽  
Gas Cleaning ◽  
High Salt Content

The disposal of fly ash with high salt content has become an important bottleneck for the further application of municipal solid waste incineration (MSWI). In this study, the soluble salt content and composition of fly ash from different MSWI were analysed. The composition of fly ash was affected by incinerator type and flue gas cleaning system, especially the type of deacidification solvent. The soluble salt content in fly ash from MSW grate incinerator can be over 35.16%. Most of the soluble salt was calcium salt and chloride salt. The effect of washing parameters including liquid/solid (L/S) ratio and washing time on salt removal from fly ash were studied. Raw fly ash contained high chlorine (Cl) with the maximum of 19.83% and it can be significantly reduced by washing. Double-washing and secondary-washing had better performance than single-washing on salt removal. The secondary-washing did not only save water, but also reduced the energy cost during evaporation for crystallising soluble salt. Based on the analysis of variance (ANOVA), L/S ratio was the most principal factor for salt and Cl removal of fly ash by washing.

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