Surfactant and irrigation impacts on soil water content and leachate of soils and greenhouse substrates

Abagandura, Gandura Omar; Park, Dara; Bridges, William C.

doi:10.1002/agg2.20153

Cited by 3 publications

(1 citation statement)

References 44 publications

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“…Highest MDD value (1.76 g/cm 3 ) was obtained for samples collected from 1.5 -2.0 m depth in the eastern part of the DS with sandy loam texture and lowest OMC and NMC values (5.23 and 7.30%, respectively). This concurs with earlier similar result by Alhassan [55]; Abagandura et al [56] and Ganiyu et al [57] that reported highest MDD at lowest moisture content. Furthermore, Table 1 shows that lowest MDD (1.07 g/cm 3 ) observed at 0 -0.5 m depth in the northern part of the DS corresponds to sample with highest mean values of NMC and OMC but lowest SG.…”

Section: Physical and Geotechnical Propertiessupporting

confidence: 93%

Assessing the physical and geotechnical properties of subsoils within an active municipal solid waste dumpsite for secured future urban growth

Ganiyu,

Olurin,

Makanjuola

et al. 2024

Afr. Sci. Rep.

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This study attempts to investigate the geotechnical properties of subsoils in an active Dumpsite (DS) within the basement complex area of Abeokuta, Nigeria with a view to assess its suitability as a foundation/filling material. Sixteen (16) composite soil samples were collected from four different parts of the DS at varied depths of 0.0 - 0.5, 0.5 - 1.0, 1.0 - 1.5, and 1.5 - 2.0 m. The soil properties considered are particle size distribution, Specific Gravity (SG), permeability, Shear Strength (SS), Maximum Dry Density (MDD), Optimum Moisture Content (OMC), Natural Moisture Content (NMC) and Atterberg limit (AL) indices. Results show that the assessed soil samples are sandy soils with less than 30% clay content. The ALs test revealed that analysed samples had low Plasticity index (PI) (0.20 - 11.96%), low values of Plastic Limit (PL) and Liquid Limit (LL) of (14.19 - 18.83% and 17.52 - 26.15%, respectively). The MDD values ranged from 1.07 to 1.76 g/cm3 while the NMC and OMC were <25% and <18%, respectively. The permeability coefficients ranged from 1.53 x 10−4 to 8.49 x 10−3 cm/s, indicating moderately permeable soil while the SS results (ranging from 3.4 to 12.5 KPa) indicate low cohesive capacity soils. The tested soils are mildly suitable for foundation/filling materials. Further study is needed to study the trend of alteration of soil properties with depth on dumpsite soil located on other geological formations.

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Section: Physical and Geotechnical Propertiessupporting

confidence: 93%

Assessing the physical and geotechnical properties of subsoils within an active municipal solid waste dumpsite for secured future urban growth

Ganiyu,

Olurin,

Makanjuola

et al. 2024

Afr. Sci. Rep.

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Bermudagrass fairway responses to various combinations of a soil surfactant and nitrogen

Sierra Augustinus,

Arevalo Alvarenga,

Schiavon

2024

Agronomy Journal

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Surfactants are commonly employed in sand‐based turfgrass systems to address soil water repellency, which often results in the formation of preferential flow channels leading to non‐uniform wetting patterns. While the influence of soil moisture on nutrient dynamics is well documented, the potential of surfactants to improve N uptake remains poorly understood. A 2‐year study was conducted on ‘Celebration’ bermudagrass [Cynodon dactylon (L.)] fairway to better understand the interaction between fertility programs (296 or 586 kg N ha−1 year−1 from ammonium sulfate and 564 kg N ha−1 year−1 primarily from a controlled‐release N fertilizer) and surfactant rate and frequency (3.2 L ha−1 every 14 or 28 days, or at 6.4 L ha−1 every 28 days) on turfgrass performance, leaf N content, and soil moisture. Overall, no significant interaction was observed between surfactant treatment and fertility program. During the dry season (November to May), fertility programs influenced turfgrass performance parameters with higher N rates consistently leading to improvements in visual quality, normalized difference vegetation index, percent green cover, and dark green color index; however, no differences were observed during the rainy season (June to October). Surfactants showed no effect on turfgrass performance but led to minimal increase in leaf N content from 3.72% to 3.85%. All surfactant treatments reduced water drop penetration time at 0 cm. Moreover, surfactant treatments applied every 28 days regardless of the rate exhibited a higher volumetric water content compared to those applied every 14 days. Surfactant applications might not be an economically feasible strategy to improve leaf N content in South Florida well‐watered bermudagrass fairways.

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Biosurfactants: Promising Biomolecules for Agricultural Applications

Silva,

Medeiros,

Converti

et al. 2024

Sustainability

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Population growth and the need for increased agricultural productivity pose a global problem. Therefore, the development of green compounds to ensure agricultural sustainability is an urgent necessity. Surfactant compounds hold significant commercial importance due to their diverse industrial uses. However, the synthetic origin of these agents limits their commercial application due to their toxicity. As a result, extensive research has focused on the production of microbial-originated green surfactants, known as biosurfactants, over the past fifteen years. These biomolecules not only offer a green alternative for agriculture but also exhibit reduced toxicity and excellent stability under specific environmental conditions. Biosurfactants can lower surface tension more effectively than synthetic surfactants. With properties such as detergency and foam formation, biosurfactants are suitable for various agricultural applications, particularly in pesticide and agrochemical formulations. They can function as biopesticides to manage pests, pathogens, phytopathogenic fungi, and weeds due to their antimicrobial activity. Moreover, plants can benefit from biosurfactant molecules and microorganisms as nutrients. They can also aid efficiently in the distribution of micronutrients and metals in the soil. They also stimulate plant immunity and are utilized for soil hydrophilization to ensure proper moisture levels and uniform fertilizer distribution. This review aims to provide valuable insights into the role and properties of biosurfactants as agricultural adjuvants, fostering the development of sustainable formulations to replace the chemical surfactants used in pesticides. For this purpose, the general aspects of global agricultural activity are initially described, followed by a discussion of pesticides, including herbicides, fungicides, and insecticide products. Next, the properties of chemical surfactants are discussed and the use of green surfactants, with emphasis on microbial biosurfactants, is demonstrated. The application of biosurfactants in the agricultural industry and trends are addressed and prospects for the application of these agents are discussed.

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Surfactant and irrigation impacts on soil water content and leachate of soils and greenhouse substrates

Cited by 3 publications

References 44 publications

Assessing the physical and geotechnical properties of subsoils within an active municipal solid waste dumpsite for secured future urban growth

Assessing the physical and geotechnical properties of subsoils within an active municipal solid waste dumpsite for secured future urban growth

Bermudagrass fairway responses to various combinations of a soil surfactant and nitrogen

Biosurfactants: Promising Biomolecules for Agricultural Applications

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