Glyphosate Leaching Through a Sandy Loam Soil Amended with Cattle Dung or Rice Husk Ash: A Laboratory Column Study

Garba, Jamilu and Samsuri Abd Wahid, . and Muhammad Saiful Ahmad Hamdani, . and Tariq, Faruq Sadiq and Nabayi, Abba (2023) Glyphosate Leaching Through a Sandy Loam Soil Amended with Cattle Dung or Rice Husk Ash: A Laboratory Column Study. Malaysian Journal of Soil Science (MJSS) (Malaysia), 27. pp. 196-203. ISSN 1394-7990

This study investigated the influence of added organic materials on glyphosate mobility through sandy loam soil. An equivalent rate of 10 t haˉ¹of either cattle dung or rice husk ash were mixed with the soil and inserted into leaching tubes Both soil mixture and controls were spiked with 20 mL of 200 mg Lˉ¹ glyphosate. This was followed by an addition 100 mL of stimulated rainfall and the leachate collected at time intervals (0,3,10,22,32,40,50 and 65 days) for glyphosate analysis. After 65 days, soils were cut into three, dried and determined for its glyphosate residual concentration. The data obtained was analysed and results revealed no significance difference (p > 0.05) in glyphosate concentration between the treatments, at time intervals (0,3,10,22,32,40,50 and 65 days) and from residual concentration in soil after leaching. Nonetheless, an increased concentration was obtained from both cattle dung (10%) and rice husk (9%) compared with control, indicating potential influence of these wastes on glyphosate mobility. The order of cumulative glyphosate concentration from post-leaching soils was as follows: control with 17.798 μg gˉ¹; > soil + rice husk ash with 15.484 μg gˉ¹; and > soil + cattle dung with 14.918 μg gˉ¹. Meanwhile, irrespective of the treatments applied, the concentration of glyphosate in the soil layers were of the following order: top layer with 17.020 μg gˉ¹; > middle with 16.745 μg gˉ¹; and > lower layer with 14.436 μg gˉ¹. The length of each layer was about 3.3 cm, suggesting low glyphosate mobility.

Full text available from: Official URL: https://www.msss.com.my/mjss/Full%20Text/vol27/V27...

Abstract

This study investigated the influence of added organic materials on glyphosate mobility through sandy loam soil. An equivalent rate of 10 t haˉ¹of either cattle dung or rice husk ash were mixed with the soil and inserted into leaching tubes Both soil mixture and controls were spiked with 20 mL of 200 mg Lˉ¹ glyphosate. This was followed by an addition 100 mL of stimulated rainfall and the leachate collected at time intervals (0,3,10,22,32,40,50 and 65 days) for glyphosate analysis. After 65 days, soils were cut into three, dried and determined for its glyphosate residual concentration. The data obtained was analysed and results revealed no significance difference (p > 0.05) in glyphosate concentration between the treatments, at time intervals (0,3,10,22,32,40,50 and 65 days) and from residual concentration in soil after leaching. Nonetheless, an increased concentration was obtained from both cattle dung (10%) and rice husk (9%) compared with control, indicating potential influence of these wastes on glyphosate mobility. The order of cumulative glyphosate concentration from post-leaching soils was as follows: control with 17.798 μg gˉ¹; > soil + rice husk ash with 15.484 μg gˉ¹; and > soil + cattle dung with 14.918 μg gˉ¹. Meanwhile, irrespective of the treatments applied, the concentration of glyphosate in the soil layers were of the following order: top layer with 17.020 μg gˉ¹; > middle with 16.745 μg gˉ¹; and > lower layer with 14.436 μg gˉ¹. The length of each layer was about 3.3 cm, suggesting low glyphosate mobility.

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Item Type:	Article
AGROVOC Term:	glyphosate
AGROVOC Term:	soil
AGROVOC Term:	leaching
AGROVOC Term:	laboratory techniques
AGROVOC Term:	soil pollution
AGROVOC Term:	pesticide residues
Geographical Term:	Nigeria
Depositing User:	Mr. Khoirul Asrimi Md Nor
Date Deposited:	19 May 2025 07:32
Last Modified:	19 May 2025 07:32
URI:	http://webagris.upm.edu.my/id/eprint/2791

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