Water Retention: Laboratory Methods

Klute, A.

doi:10.2136/sssabookser5.1.2ed.c26

Cited by 1,024 publications

(380 citation statements)

References 47 publications

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“…Water samples were analysed for different chemical constituents 27 . Soil samples were air-dried and analysed following the standard methods 27,[33][34][35] . Mechanical analysis of soils was done by the international pipette method.…”

Section: Methodsmentioning

confidence: 99%

Influence of Irrigation Water on Black Soils in Amravati District, Maharashtra

Padekar¹,

Bhattacharyya

Ray

et al. 2016

Current Science

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In view of earlier reports on the occurrence of saltaffected shrink-swell soils in the Purna valley areas in Amravati district of Maharashtra, the present study was carried out to assess the current nature and extent of soil degradation due to use of irrigation water. Results indicate that the irrigation water used to raise agricultural crops in Amravati, Bhatkuli, Warud and Daryapur tehsils contains enough soluble Na-ions and residual sodium carbonate as the water belongs to C4S2 and C4S1 class of the United States Salinity Laboratory. The anthropogenic activities by introducing irrigation have caused severe drainage problem in the shrink-swell soils of the district, which are highly clayey and smectitic that have inherent low permeability. Only exception is the better drained soils of Warud tehsil, which are endowed with Ca-zeolite that help to ward off the ill effects of irrigation. The study thus suggests that continuing the present anthropogenic activities might render the soils unsuitable for agricultural production in the future. In contrast, the soils which are not irrigated do not suffer from any serious degradation in terms of high exchangeable Na (ESP) and low saturated hydraulic conductivity (sHC), suggesting that it would be prudent to encourage rainfed agriculture in the district under improved management practices.

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Section: Methodsmentioning

confidence: 99%

Influence of Irrigation Water on Black Soils in Amravati District, Maharashtra

Padekar¹,

Bhattacharyya

Ray

et al. 2016

Current Science

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“…For both fields, three horizons could be distinguished in which three soil samples were taken. Saturated hydraulic conductivity was measured on the undisturbed soil cores using the constant head method [12] and five points of the retention curve were determined with a combination of hanging water columns and pressure cells [13]. The limited amount of samples (nine for each field) does not allow statements about the spatial variability of soil hydraulic properties within the fields, but the data does show a larger variability between the different soil layers than between the different replicates for each layer.…”

Section: Hydraulic Propertiesmentioning

confidence: 99%

Modeling of Water Flow and Nitrate Transport to Subsurface Drains

El‐Sadek¹,

Radwan²

2018

JACEN

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In this study, the water flow and nitrate transport to a subsurface drain, using a simplified and detailed model, are simulated for the specific hydro-geological conditions of Elverdinge and Assenede, Belgium. Previously, the DRAIN MOD-N model proved to be able to simulate nitrate concentrations and drainage well for an in-situ leaching experiment, the "Hooibeekhoeve" in the community of Geel (north-eastern part of Belgium), conducted in 1992-1995. In this study, the calibrated model is used to simulate the nitrate leaching for the winter period 2000-2001 in Elverdinge and Assenede and is compared to a model with a simplified nitrate transport description. The comparative analysis between both model approaches reveals that the simplified model is able to predict sufficiently accurate the observed nitrate leaching. The detailed approach however has the advantage of giving a more accurate estimate of the nitrogen mineralization, N deposition and denitrification, resulting in a more precise modeling of the nitrate leaching to surface waters and groundwater.

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“…Soil samples were collected for some physical and chemical soil characteristics the methodological procedures were according to methods described by Klute (1986) and Page et al (1982) respectively (Tables 1&2).…”

Section: Soil Characteristicsmentioning

confidence: 99%

Effect of Water and Salt Stresses on Productivity of Cantaloupe in Ismailia Soil

ali¹,

Mohamed²

2017

Egypt.J. Soil Sci.

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S ALINITY is a major problem that negatively impacts agricultural activities in many regions in the world, and especially the Near East and North Africa region. Generally, salinity problems increase with increasing salt concentration in irrigation water. Water scarcity is a limiting factor for crop production in arid and semi-arid regions. Drip irrigation has the greatest advantages over other irrigation methods when saline water is used. In irrigated lands, the production of total and marketable yield depends largely on the quantity and salinity of the irrigation water. Field experiments were carried out in El Kasasin El Gedeida area, El-Ismailia Governorate, Egypt during the summer season of 2015. The main objective was to investigate the effectiveness of applied irrigation water stress (IR 100% , IR 90% , IR 80% and IR 70% ) at different salt stress levels of irrigation water SL (FW= 0.80, S1= 1.56, S2= 3.14 and S3= 6.25 dS m -1 ) on the total production of marketable yield (Ya), fruit quality parameters, water use efficacy (WUE), irrigation water use efficiency (IWUE) and yield response factor (Ky) of cantaloupe (Cucumis melo L. var. cantalupensis). The results revealed that the total production and fruit quality parameters of cantaloupe except diameter (D), protein (P) and (pH) were recorded significantly increased with the increase of SL for all IR treatments. Also, fruit quality of cantaloupe except (D), (P) and total soluble solid (TSS) were recorded significantly increased with the decrease of IR for all SL treatments. The values of ET cadj and Ks decreased with increasing SL for all IR treatments while, decreased with decreasing IR for all SL treatments. In addition; the maximum value of Ya for cantaloupe was 7.65 Mg fed -1 under FW and IR 100% (control treatment). While, the minimum value of Ya was 1.71 Mg fed -1 under S3 and IR 70% treatment. Also, the results reported that the FW and IR 80% treatment recorded the maximum increases reached 33 and 18 % for WUE and IWUE of cantaloupe respectively, compared to that under control treatment. The minimum value of Ky for cantaloupe was 0.17 under FW and IR 80% treatment. Finally, to save approximately 20% of applied irrigation water, IR 80% could be used under salinity levels of irrigation water (FW, S1 and S2). While, to save approximately 10% of applied irrigation water, IR 90% could be used under SL (S3).Abbreviations: Ks: water and salt stresses; ETcadj: adjust crop evapotranspiration; IR: applied irrigation water; SL: salt stress levels of irrigation water; Ya: marketable yield; ETc: crop evapotranspiration; WUE: water use efficiency; IWUE: irrigation water use efficiency; Ky: yield response factor.

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Water Retention: Laboratory Methods

Cited by 1,024 publications

References 47 publications

Influence of Irrigation Water on Black Soils in Amravati District, Maharashtra

Influence of Irrigation Water on Black Soils in Amravati District, Maharashtra

Modeling of Water Flow and Nitrate Transport to Subsurface Drains

Effect of Water and Salt Stresses on Productivity of Cantaloupe in Ismailia Soil

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