Affiliation:
1. ONDOKUZ MAYIS UNIVERSITY
Abstract
In this study, the effects of the addition of polyvinyl alcohol (PVA), polyacrylamide (PAM), and humic acid (HA) to soils in sandy loam, loam, and clay texture classes on their resistance to dispersion and mechanical forces were examined. The study was performed under greenhouse conditions using surface soil samples and 1.5 kg pots. Furthermore, the study was planned as an incubation experiment and the application of PVA, PAM, and HA at 500, 100, and 500 ppm doses for each soil texture class, respectively. During the incubation times (1 (0), 2 (15), 3 (30) 30, and 4 (45) days), the irrigation process was repeated as half of the available moisture in the soil was depleted. Ultimately, the applications of PVA, PAM, and HA on soils in sandy loam, loam, and clay textures increased the liquid limit/ pF'2 moisture ratio (LL/pF'2) values in them by 6.30%, 5.99%, and 7.30%, respectively, (reducing the tendency to dispersion) compared to the control. Furthermore, the applications increased the plastic limit/pF’2 moisture ratio (PL/pF’2) values (resistance to mechanical forces) by 22.31%, 16.50%, and 9.27%, respectively. Incubation time 1 was more effective in reducing dispersion and increasing resistance to mechanical forces, and the effects decreased over time. PVA was the most effective conditioner for all three soil groups.
Reference28 articles.
1. Aksakal, E. L. & Öztaş, T. (2010). Effects of polyviniylalcohol, humic acid and polyacrylamide applications on structural stability and soil losses. III. National Black Sea Forestry Congress, 953-962.
2. Bjorneberg, D. L., Santos, F. L., Castanheira, N. S., Martins, O. C., Reis, J. L., Aase, J. K., & Sojka, R. E. (2003). Using polyacrylamide with sprinkler irrigation to improve infiltration. Journal of soil and water conservation, 58(5), 283-289.
3. Blanco-Canqui, H., & Lal, R. (2008). Principles of soil conservation and management. Springer Science & Business Media.
4. Busari, M. A., Kukal, S. S., Kaur, A., Bhatt, R., & Dulazi, A. A. (2015). Conservation tillage impacts on soil, crop and the environment. International soil and water conservation research, 3(2), 119-129
https://doi.org/10.1016/j.iswcr.2015.05.002
5. Bülbül, E. (2019). Changes in structural and mechanical parameters of soils under different land use in Tokat-Turhal region (Master's thesis).
https://doi.org/10.7161/omuanajas.907976