scholarly journals Hydrological Properties of a Clay Loam Soil as Affected by Biochar Application in a Pot Experiment

Agronomy ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 489
Author(s):  
Angela Libutti ◽  
Matteo Francavilla ◽  
Massimo Monteleone
Keyword(s):  
Bulk Density ◽  
Water Retention ◽  
Infiltration Rate ◽  
Water Infiltration ◽  
Pot Experiment ◽  
Water Retention Curve ◽  
Clay Loam ◽  
Clay Loam Soil ◽  
Loam Soil ◽  
The Impact

Improving soil-water relations by amending soil with biochar might play a significant role in increasing water availability for agricultural crops as well as decreasing water loss through drainage or runoff. While the effects of biochar on the hydrological properties on coarse-textured soils are generally positive and well-documented in the literature, studies on biochar effects on fine-textured soils are rather scarce and even contradictory. Therefore, the aim of this paper was to investigate the impact of biochar on the bulk density, water retention curve (together with several water capacitive indicators) and water infiltration rate in a clay loam soil. A pot experiment was carried out under lab conditions in which biochar was mixed with soil at rates of 0 (B0 or control), 2, 4, 6, 8 and 10% dw (B2, B4, B6, B8 and B10, respectively). Water retention of soil–biochar mixtures at different matrix potentials was determined using a pressure plate apparatus. From these measurements, a series of capacitive indicators was derived and the fitting of the van Genuchten model was also performed. Water infiltration into soil–biochar mixtures was measured by means of a mini-disk infiltrometer and the obtained data were analyzed both directly and by fitting the Philip’s model. Biochar significantly affected the considered soil properties. As the biochar rate increased, the bulk density decreased and water retention increased (B6, B8 and B10 > B2, B4 and B0), while the infiltration rate decreased (B0 > B2, B4, B6, B8 and B10). Although the experiment was performed on sieved and repacked soil samples under lab conditions, the results confirmed that biochar has the potential to increase plant-available water, while possibly reducing drainage water in a clay loam soil by lowering the infiltration rate.

The Impact of Nitrogen Placement and Tillage on NO, N2O, CH4 and CO2 Fluxes from a Clay Loam Soil

2006 ◽  
Vol 280 (1-2) ◽  
pp. 177-188 ◽  
Author(s):  
Xuejun J. Liu ◽  
Arvin R. Mosier ◽  
Ardell D. Halvorson ◽  
Fusuo S. Zhang
Keyword(s):  
Co2 Fluxes ◽  
Clay Loam ◽  
Clay Loam Soil ◽  
Loam Soil ◽  
The Impact

Fly ash influence on near-surface temperature of a clay loam soil

1998 ◽  
Vol 78 (2) ◽  
pp. 345-350 ◽  
Author(s):  
A. M Hammermeister ◽  
D. S. Chanasyk ◽  
M. A. Naeth
Keyword(s):  
Particle Size ◽  
Heat Capacity ◽  
Fly Ash ◽  
Particle Size Distribution ◽  
Soil Temperature ◽  
Water Content ◽  
Bulk Density ◽  
Clay Loam ◽  
Clay Loam Soil ◽  
Loam Soil

It has been suggested that fly ash, when applied as a soil amendment, would increase soil temperature. However, no quantitative data have been provided to support this hypothesis. This hypothesis was tested on four fly ash treatments (0, 100, 200, and 400 t ha−1) applied to clay loam soil in a randomized block design. Bi-hourly soil temperatures were measured on 3 summer days over 2 yr, and afternoon temperatures were measured on randomly selected spring days at 5-, 10-, and 20-cm depths in the four fly ash treatments. Temperatures were measured in conjunction with surface bulk density, water content, and particle size distribution which were also used to calculate thermal heat capacity. Fly ash decreased percent clay, soil water content, and soil heat capacity. Contrary to previously expected trends, fly ash amendment did not significantly increase mean daily soil temperature under dry conditions. Generalizations in the literature regarding the influence of fly ash on soil temperature, bulk density, and water-holding capacity must be considered carefully since they generally relate only to coarse to medium textured soils. Key words: Soil amendments, bulk density, reclamation, heat capacity, thermal diffusivity, thermal conductivity, volumetric water content, particle size distribution

scholarly journals The Effects of Root Aeration and Different Soil Conditioners on the Nutritional Values, Yield, and Water Productivity of Potato in Clay Loam Soil

Agronomy ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 418 ◽  
Author(s):  
Mohamed E. Abuarab ◽  
Mohamed M. El-Mogy ◽  
Ahmed M. Hassan ◽  
Emad A. Abdeldaym ◽  
Noha H. Abdelkader ◽  
...  
Keyword(s):  
Water Productivity ◽  
Maximum Yield ◽  
Growing Season ◽  
Air Injection ◽  
Water Infiltration ◽  
Clay Loam ◽  
Clay Loam Soil ◽  
Nutritional Values ◽  
Growing Seasons ◽  
Loam Soil

A field study was conducted in 2016–2017 and 2017–2018 to evaluate the effects of air injection into an irrigation stream during the subsurface drip irrigation (SDI) process on the nutritional values and productivity of potato grown in clay loam soil. Two irrigation treatments (non-aerated and aerated) and six fertilizer applications (chicken, cow, rabbit, compost, mineral, and chicken + biochar) were compared. In the first growing season, the maximum yield occurred under aerated treatment with cow fertilizer (36.25 ton ha−1), while the minimum yield occurred under non-aerated treatment with chicken fertilizer (24.00 ton ha−1). On the other hand, the maximum and minimum yields in the second growing season were 35.00 and 24.74 ton ha−1 under aerated and non-aerated treatments with cow fertilizer, respectively. Maximum water productivity was achieved under aerated treatment with cow fertilizer (10.04 and 9.13 kg m−3 for the first and second growing seasons, respectively), while minimum water productivity was achieved under the non-aerated treatment with chicken + biochar fertilizer (5.91 and 5.26 kg m−3 for the first and second growing seasons, respectively). Fertilization using aerated treatment yielded the best results and the highest coupling after air injection, compared with the traditional methods of adding soil fertilizer without aeration. The plant growth parameters significantly increased following aeration relative to non-aerated treatments for all fertilizer applications in both growing seasons. Air injection into the soil for potatoes, unsurprisingly, not only benefitted the crop by increasing the soil–air exchange rate but also promoted water infiltration rates and nutrient absorption and reduced drainage water, thus increasing water productivity and reducing the overall irrigation requirements.

scholarly journals An automated microinfiltrometer to measure small-scale soil water infiltration properties

2014 ◽  
Vol 62 (3) ◽  
pp. 248-252 ◽  
Author(s):  
Dennis C. Gordon ◽  
Paul D. Hallett
Keyword(s):  
Sandy Loam ◽  
Bubble Formation ◽  
Glass Tube ◽  
Infiltration Rate ◽  
Sandy Loam Soil ◽  
Water Infiltration ◽  
Water Volume ◽  
Small Scale ◽  
Clay Loam ◽  
Loam Soil

Abstract We developed an automated miniature constant-head tension infiltrometer that measures very small infiltration rates at millimetre resolution with minimal demands on the operator. The infiltrometer is made of 2.9 mm internal radius glass tube, with an integrated bubbling tower to maintain constant negative head and a porous mesh tip to avoid air-entry. In the bubbling tower, bubble formation and release changes the electrical resistance between two electrodes at the air-inlet. Tests were conducted on repacked sieved sands, sandy loam soil and clay loam soil, packed to a soil bulk density ρd of 1200 kg m-3 or 1400 kg m-3 and tested either air-dried or at a water potential ψ of -50 kPa. The change in water volume in the infiltrometer had a linear relationship with the number of bubbles, allowing bubble rate to be converted to infiltration rate. Sorptivity measured with the infiltrometer was similar between replicates and showed expected differences from soil texture and ρd, varying from 0.15 ± 0.01 (s.e.) mm s-1/2 for 1400 kg m-3 clay loam at ψ = -50 kPa to 0.65 ± 0.06 mm s-1/2 for 1200 kg m-3 air dry sandy loam soil. An array of infiltrometers is currently being developed so many measurements can be taken simultaneously.

scholarly journals Influence of soil applied cadmium on the growth and cadmium content In Indian spinach (Basella rubra L.)

2013 ◽  
pp. 135-147
Author(s):  
MG Kibria ◽  
KT Osman ◽  
M Islam ◽  
MJ Ahammad
Keyword(s):  
Pot Experiment ◽  
Cadmium Content ◽  
Clay Loam ◽  
Clay Loam Soil ◽  
Plant Parts ◽  
Loam Soil ◽  
Positive Correlations

Growth and accumulation of cadmium (Cd) in Indian spinach (Basella rubra L.) grown in three different textured soils treated with various levels of Cd was studied by a pot experiment. In general, Cd application caused a suppression of dry weights of leaves, stems and roots. The increasing application of Cd from 1 to 9 mg Cd kg-1 soil significantly increased Cd concentration in leaf, stem and root from that of the control. The highest concentrations of Cd were found in roots and the lowest concentrations were found in the stems with moderate values in leaves in clay loam soil while in other two soils, the Cd concentrations in leaves and stems were almost similar being lower than those in roots. Positive correlations were found between 0.1 M HCl extractable Cd in soils after harvest and concentrations of Cd in plant parts of Indian spinach. DOI: http://dx.doi.org/10.3329/cujbs.v5i1.13379 The Chittagong Univ. J. B. Sci.,Vol. 5(1 &2):135-147, 2010

scholarly journals Biocrust effects on soil infiltrability in the Mu Us Desert: Soil hydraulic properties analysis and modeling

2021 ◽  
Vol 69 (4) ◽  
pp. 378-386
Author(s):  
Hongjie Guan ◽  
Xinyu Liu
Keyword(s):  
Soil Water ◽  
Hydraulic Properties ◽  
Water Retention ◽  
Infiltration Rate ◽  
Water Dynamics ◽  
Water Infiltration ◽  
Water Retention Curve ◽  
Soil Hydraulic Properties ◽  
Mu Us Desert ◽  
Soil Hydraulic

Abstract The presence of biocrusts changes water infiltration in the Mu Us Desert. Knowledge of the hydraulic properties of biocrusts and parameterization of soil hydraulic properties are important to improve simulation of infiltration and soil water dynamics in vegetation-soil-water models. In this study, four treatments, including bare land with sporadic cyanobacterial biocrusts (BL), lichen-dominated biocrusts (LB), early-successional moss biocrusts (EMB), and late-successional moss biocrusts (LMB), were established to evaluate the effects of biocrust development on soil water infiltration in the Mu Us Desert, northwest of China. Moreover, a combined Wooding inverse approach was used for the estimation of soil hydraulic parameters. The results showed that infiltration rate followed the pattern BL > LB > EMB > LMB. Moreover, the LB, EMB, and LMB treatments had significantly lower infiltration rates than the BL treatment. The saturated soil moisture (θs ) and shape parameter (α VG) for the EMB and LMB treatments were higher than that for the BL and LB treatments, although the difference among four treatments was insignificant. Water retention increased with biocrust development at high-pressure heads, whereas the opposite was observed at low-pressure heads. The development of biocrusts influences van Genuchten parameters, subsequently affects the water retention curve, and thereby alters available water in the biocrust layer. The findings regarding the parameterization of soil hydraulic properties have important implications for the simulation of eco-hydrological processes in dryland ecosystems.

NINE FORAGES AND THE AGGREGATION OF A CLAY LOAM SOIL

1989 ◽  
Vol 69 (1) ◽  
pp. 165-169 ◽  
Author(s):  
J. A. STONE ◽  
B. R. BUTTERY
Keyword(s):  
Key Words ◽  
Root Development ◽  
Soil Degradation ◽  
Va Mycorrhiza ◽  
Pot Experiment ◽  
Clay Loam ◽  
Clay Loam Soil ◽  
Structural Deterioration ◽  
Growth Room ◽  
Loam Soil

A growth room pot experiment was conducted to relate differences in the aggregating ability of several grasses and legumes to root development and the frequency of VA mycorrhiza fungi. Forages with the most extensive root development within 80 d resulted in the greatest improvements in aggregation. Although the frequency of VA mycorrhiza varied between forages, it was not associated with improvements in aggregation. Key words: Soil structural deterioration, soil degradation, VA mycorrhiza, roots, grasses, legumes

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