DETACHMENT RATE, SOIL ERODIBILITY, AND SOIL STRENGTH AS INFLUENCED BY LIVING PLANT ROOTS PART I: LABORATORY STUDY

2001 ◽  
Vol 44 (5) ◽  
Author(s):  
M. Mamo ◽  
G. D. Bubenzer
Keyword(s):  
Laboratory Study ◽  
Soil Strength ◽  
Plant Roots ◽  
Soil Erodibility ◽  
Living Plant ◽  
Detachment Rate

scholarly journals Quantifying Mechanistic Detachment Parameters Due to Humic Acids in Biological Soil Crusts

Land ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 1180
Author(s):  
Atheer A. Abbood ◽  
Abdul-Sahib T. Al-Madhhachi
Keyword(s):  
Electrical Conductivity ◽  
Organic Matter ◽  
Humic Acid ◽  
Biological Soil Crusts ◽  
Exchange Capacity ◽  
Scale Model ◽  
Small Scale ◽  
Soil Erodibility ◽  
Soil Crusts ◽  
Detachment Rate

Humic acid (HA) is a material that could be used to decrease erosion and improve soil structure. It is also known that biological soil crusts (biocrusts) have a major role in soil stabilization, but the mechanism is not well understood in the presence of HA, especially with mechanistic soil detachment rate parameters (b0 and b1) of the Wilson model, where b0 is the dimensional soil detachment parameter and b1 is the dimensional soil threshold parameter. Therefore, this study intends to (1) investigate the effect of different humic acid (HA) concentrations (0%, 4%, and 8%) on mechanistic soil detachment rate parameters (b0 and b1,) in the Tigris Riversides of the Gheraiat region, Baghdad City, Iraq, of the crusted versus uncrusted soils using a small scale model of the jet erosion tests (mini-JET) at different curing periods (1 week, 2 weeks, and 3 weeks), and (2) examine the impact of HA on b0 and b1 parameters versus some soil characteristics, such as electrical conductivity, cation exchange capacity, and soil organic matter for uncrusted and crusted soils. Thirty-six undisturbed soil specimens (18 for crusted soils and 18 for uncrusted soils) were acquired from the Tigris Riverbank. On these specimens, the mini-JET was used to determine the mechanistic cohesive soil erodibility parameters b0 and b1. The results showed that the value of b0 decreased up to 60% with an increase in curing times for crusted soils until they reached their optimum values at 2 weeks. There was no consistent pattern for b1 at different curing times. As the concentration of HA increased, the value of b0 decreased up to 86% and 99% for crusted and uncrusted soils, respectively. HA significantly improved electrical conductivity, exchange capacity, and organic matter in the soil and reduced soil erodibility. This study provides the benefits of adding HA to the soils as a soil stabilizer using a low-cost technique, which is the JET instrument.

Mechanistic Detachment Rate Model to Predict Soil Erodibility Due to Fluvial and Seepage Forces

2014 ◽  
Vol 140 (5) ◽  
pp. 04014010 ◽  
Author(s):  
A. T. Al-Madhhachi ◽  
G. A. Fox ◽  
G. J. Hanson ◽  
A. K. Tyagi ◽  
R. Bulut
Keyword(s):  
Soil Erodibility ◽  
Rate Model ◽  
Detachment Rate

Spore germination inHebeloma stimulated by living plant roots

1980 ◽  
Vol 36 (9) ◽  
pp. 1056-1057 ◽  
Author(s):  
N. Fries ◽  
D. Birraux
Keyword(s):  
Spore Germination ◽  
Plant Roots ◽  
Living Plant

The influence of soil strength on the penetration of a loam by plant roots

Soil Research ◽  
1965 ◽  
Vol 3 (1) ◽  
pp. 69 ◽  
Author(s):  
KP Barley ◽  
DA Farrell ◽  
EL Greacen
Keyword(s):  
Root Elongation ◽  
Soil Strength ◽  
Plant Roots ◽  
Pea Roots ◽  
Limiting Condition ◽  
General Influence

Wheat and pea roots were grown through soil crumbs until they encountered cores of more finely structured earth. The cores were prepared from a loam at various bulk densities and matric suctions. Over a range commonly found in the field, the penetration and growth of the roots were controlled chiefly by the strength of the soil. Soil strength should be regarded as a property that has a general influence on root elongation, rather than as a limiting condition encountered in unusual soils.

Ion Uptake by Living Plant Roots

Science ◽  
1961 ◽  
Vol 133 (3456) ◽  
pp. 881-882 ◽  
Author(s):  
J. M. Walker ◽  
S. A. Barber
Keyword(s):  
Ion Uptake ◽  
Plant Roots ◽  
Living Plant

Sample Preparation for Fluorescence Imaging of the Cytoskeleton in Fixed and Living Plant Roots

2009 ◽  
pp. 157-169 ◽  
Author(s):  
Julia Dyachok ◽  
Cheol-Min Yoo ◽  
Karuppaiah Palanichelvam ◽  
Elison B. Blancaflor
Keyword(s):  
Sample Preparation ◽  
Fluorescence Imaging ◽  
Plant Roots ◽  
Living Plant

scholarly journals Variations in Soil Erosion Resistance of Gully Head Along a 25-Year Revegetation Age on the Loess Plateau

Water ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 3301
Author(s):  
Zhuoxin Chen ◽  
Mingming Guo ◽  
Wenlong Wang
Keyword(s):  
Shear Stress ◽  
Soil Erosion ◽  
Erosion Resistance ◽  
Stable State ◽  
Critical Shear Stress ◽  
Soil Erodibility ◽  
Undisturbed Soil ◽  
Concentrated Flow ◽  
Detachment Rate ◽  
Gully Head

The effects of vegetation restoration on soil erosion resistance of gully head, along a revegetation age gradient, remain poorly understood. Hence, we collected undisturbed soil samples from a slope farmland and four grasslands with different revegetation ages (3, 10, 18, 25 years) along gully heads. Then, these samples were used to obtain soil detachment rate of gully heads by the hydraulic flume experiment under five unit width flow discharges (2–6 m3 h). The results revealed that soil properties were significantly ameliorated and root density obviously increased in response to restoration age. Compared with farmland, soil detachment rate of revegetated gully heads decreased 35.5% to 66.5%, and the sensitivity of soil erosion of the gully heads to concentrated flow decreased with revegetation age. The soil detachment rate of gully heads was significantly related to the soil bulk density, soil disintegration rate, capillary porosity, saturated soil hydraulic conductivity, organic matter content and water stable aggregate. The roots of 0–0.5 and 0.5–1.0 mm had the highest benefit in reducing soil loss of gully head. After revegetation, soil erodibility of gully heads decreased 31.0% to 78.6%, and critical shear stress was improved by 1.2 to 4.0 times. The soil erodibility and critical shear stress would reach a stable state after an 18-years revegetation age. These results allow us to better evaluate soil vulnerability of gully heads to concentrated flow erosion and the efficiency of revegetation.

Imaging the Cytoskeleton in Living Plant Roots

2021 ◽  
pp. 139-148
Author(s):  
Chenglin Chai ◽  
Sabrina Chin ◽  
Elison B. Blancaflor
Keyword(s):  
Plant Roots ◽  
Living Plant
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