scholarly journals Estimating Soil Salinity Over a Shallow Saline Water Table in Semiarid Tunisia

2010 ◽  
Vol 4 (1) ◽  
pp. 91-101 ◽  
Author(s):  
Fethi Bouksila
Keyword(s):  
Water Table ◽  
Soil Salinity ◽  
Saline Water

Development and application of long-term root zone salt balance model for predicting soil salinity in arid shallow water table area

2019 ◽  
Vol 213 ◽  
pp. 486-498 ◽  
Author(s):  
Guanfang Sun ◽  
Yan Zhu ◽  
Ming Ye ◽  
Jinzhong Yang ◽  
Zhongyi Qu ◽  
...  
Keyword(s):  
Shallow Water ◽  
Water Table ◽  
Soil Salinity ◽  
Root Zone ◽  
Balance Model ◽  
Salt Balance ◽  
Shallow Water Table

scholarly journals Effects of water salinity and organomineral fertilization on leaf composition and production in Passiflora edulis

2018 ◽  
Vol 22 (8) ◽  
pp. 535-540 ◽  
Author(s):  
José T. A. Souza ◽  
Járisson C. Nunes ◽  
Lourival F. Cavalcante ◽  
Juliete A. da S. Nunes ◽  
Walter E. Pereira ◽  
...  
Keyword(s):  
Potassium Chloride ◽  
Soil Salinity ◽  
Saline Water ◽  
Organic Polymer ◽  
Similar Proportion ◽  
Consumer Market ◽  
Macronutrient Composition ◽  
Passiflora Edulis ◽  
Leaf Composition ◽  
Yellow Passion Fruit

ABSTRACT An experiment was undertaken in Remígio County, Paraíba State, Brazil, from July 2013 to May 2014, in order to evaluate the effects of saline water irrigation, bovine biofertilizer, and potassium type on soil salinity, leaf macronutrient composition, and production of yellow passion fruit cv. BRS Gigante Amarelo. Treatments were distributed in randomized blocks, arranged in a 2 × 2 × 2 factorial design, with reference to electrical conductivity of the water (0.35 and 4.00 dS m-1), soil with and without bovine biofertilizer, and application of potassium chloride as a conventional treatment (KCl) and in an organic polymer-coated form, supplied monthly. Bovine biofertilizer was diluted in non-saline water (proportion, 50%) and applied via water at a volume of 6 L plant-1 one day before transplanting, and then every 90 days. The combination of saline water with bovine biofertilizer raised soil salinity to a similar proportion when comparing saline water and conventional potassium chloride with saline water and polymer-coated potassium chloride. The increase in water saline concentrations associated with both types of potassium chloride and with bovine biofertilizer elevated soil salinity from non-saline to saline. On starting to flower, plants of cv. BRS Gigante Amarelo were deficient in macronutrients other than nitrogen and potassium, but nonetheless produced fruits of an adequate mass for the consumer market.

scholarly journals Long-Term Amelioration Practices Reshape the Soil Microbiome in a Coastal Saline Soil and Alter the Richness and Vertical Distribution Differently Among Bacterial, Archaeal, and Fungal Communities

2022 ◽  
Vol 12 ◽  
Author(s):  
Ruibo Sun ◽  
Xiaogai Wang ◽  
Yinping Tian ◽  
Kai Guo ◽  
Xiaohui Feng ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Soil Salinity ◽  
Saline Soil ◽  
Saline Water ◽  
Soil Microbial Communities ◽  
Soil Microbiome ◽  
Economic Losses ◽  
Saline Water Irrigation ◽  
Coastal Saline Soil ◽  
Plastic Mulching

Globally soil salinity is one of the most devastating environmental stresses affecting agricultural systems and causes huge economic losses each year. High soil salinity causes osmotic stress, nutritional imbalance and ion toxicity to plants and severely affects crop productivity in farming systems. Freezing saline water irrigation and plastic mulching techniques were successfully developed in our previous study to desalinize costal saline soil. Understanding how microbial communities respond during saline soil amelioration is crucial, given the key roles soil microbes play in ecosystem succession. In the present study, the community composition, diversity, assembly and potential ecological functions of archaea, bacteria and fungi in coastal saline soil under amelioration practices of freezing saline water irrigation, plastic mulching and the combination of freezing saline water irrigation and plastic mulching were assessed through high-throughput sequencing. These amelioration practices decreased archaeal and increased bacterial richness while leaving fungal richness little changed in the surface soil. Functional prediction revealed that the amelioration practices, especially winter irrigation with saline water and film mulched in spring, promoted a community harboring heterotrophic features. β-null deviation analysis illustrated that amelioration practices weakened the deterministic processes in structuring coastal saline soil microbial communities. These results advanced our understanding of the responses of the soil microbiome to amelioration practices and provided useful information for developing microbe-based remediation approaches in coastal saline soils.

Forensic engineering

2021 ◽  
pp. 287-314
Author(s):  
Manizhe Zarei ◽  
Omid Bozorg-Haddad ◽  
Vijay P. Singh
Keyword(s):  
Water Management ◽  
Water Pollution ◽  
Water Table ◽  
Saline Water ◽  
Engineering Approach ◽  
Drying Up ◽  
Forensic Engineering ◽  
Floods And Droughts ◽  
The Relationship ◽  
Looking Back

Abstract Throughout history, natural events such as floods, droughts, fires, lightning, and storms have caused significant losses of life and property. To mitigate the hazardous consequences of such events, or ‘failures’ (as they are referred to), a number of questions can be asked, such as: ‘What are the causes of these events?’; ‘What natural factors cause these events?’; ‘What is the human role in the occurrence of these events?’; ‘Who is to blame for such events?’; and ‘What actions should be taken to prevent such events from happening?’ The forensic engineering approach allows us to answer these questions. Forensic engineering, a term developed in recent years, allows us to identify the causes of events by looking back and analyzing the relationship between an event's causes and their consequences; it is a useful tool for determining the natural or human causes of events that lead to disasters. Forensic hydrology is a branch of forensic engineering and applies directly to floods and droughts but is not limited to these events. Forensic hydrology is also used for the historical assessment and analysis of events such as water pollution, drying of lakes and rivers, the drying up (or significant reduction in the water table) of wells, and the infiltration of saline water into freshwater. Forensic hydrology analyzes event evidence and data from a variety of perspectives. Examining the origins and mechanisms of such events to find their causes can lead to better water management, allocation and improved use, and can also help to prevent or minimize severe damage. This chapter provides an introduction to forensic engineering and describes the processes which should be followed to evaluate hazardous events.

Effect of salinity on soil structure and soil hydraulic characteristics

2020 ◽  
pp. 1-12
Author(s):  
Shengqiang Tang ◽  
Dongli She ◽  
Hongde Wang
Keyword(s):  
Soil Salinity ◽  
Soil Structure ◽  
Hydraulic Properties ◽  
Saline Water ◽  
Silty Clay ◽  
Silt Loam ◽  
Aggregate Formation ◽  
Soil Columns ◽  
Retention Capacity ◽  
Primary Particles

Revealing the influences of soil salinity on soil structure and hydraulic properties contributes to understanding the mechanism of salinity restraining rehabilitation of saline sodic soil in coastal area. After being passed through a 1 mm sieve, silt loam and silty clay were irrigated with saline water to achieve different soil salinities to highlight the effect of irrigation salinity on aggregate formation from primary particles. Three irrigation events with different saline water were conducted in the same 2 mo interval in soil columns; the soil columns were subjected to natural evaporation during the interval. The soil salinity, soil structure, soil–water characteristic curve, and saturated hydraulic conductivity (Ks) results were determined after the end of the third drying subprocess. The results showed that the proportion of water-stable macroaggregates (0.25–2 mm) in the silt loam and silty clay increased as the soil salt content (SSC) increased. Under the same matric suction, the retention capacity and plant-available water capacity (PAWC) of the silt loam first increased and then decreased, with the SSC increasing to a maximum of approximately 14.5 g kg−1. The retention capacity of the silty clay increased with the SSC, whereas the PAWC decreased with the SSC. The Ks of the silt loam increased with SSC. This study reveals the effects of soil salinity on aggregate formation from primary particles in wetting–drying cycles and describes the corresponding changes in hydraulic properties, which influence the rehabilitation of saline sodic soils in coastal areas.

Effect of temporary rise of saline water table on dry matter yield of oats (Avena byzantina)

1974 ◽  
Vol 14 (71) ◽  
pp. 811 ◽  
Author(s):  
FG Abd-El-Kaddous
Keyword(s):  
Water Table ◽  
Dry Matter ◽  
Saline Water ◽  
Growth Stages ◽  
Dry Matter Yield ◽  
Water Tables ◽  
Temporary Rise ◽  
Effect On Yield ◽  
Water Table Rise ◽  
Yield Of Oats

In 1968 and 1969, at Kerang, Victoria, the dry matter yield of oats (Avena byzantina) grown on a sodic soil were measured under conditions of fluctuating saline (31 mmhos cm-1) water tables. In each year, a water table was established for 14 days at one of three growth stages and at depths varying from 7.5 to 90 cm. Relative to the yield obtained when the water table remained at 90 cm depth, dry matter yields were reduced by 70 per cent (1968) and 79 per cent (1969) by one temporary water table rise to a depth of 7.5 cm for 14 days. Intermediate reductions in yields occurred when the water tables rose temporarily to intermediate depths from 82.5 cm to 15 cm (7.5 cm intervals). The growth stage at which the water table rise occurred had no significant effect on yield, except in the second period in 1969 when yield was reduced during conditions of high temperature and low evaporation.

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