Soil characteristics pattern with the depth as affected by forest conversion to rubber plantation

Abstract

Abstract:This research was an attempt to study the impact of forest conversion to intensive rubber plantation on soil characteristics. We selected three landuses (forest, jungle rubber, and rubber plantation) in Bukit Duabelas and Harapan landscape, Jambi, and each repeated three times. Soil profiles were described and sampled at every 10 cm layer to 200 cm depth. Soil bulk density, pH, exchangeable basic cations content, and CEC were determined. The result showed that in three landuses, bulk density is relatively low in the upper 20 cm, but increased with depth. Clay content was lower in forest than other landuses, and increased with depth in forest and jungle rubber. In rubber plantation however, fine clay was accumulated at 60-140 cm depth. The CEC pattern with depth was in accordance to the clay content. There was no significant difference in soil pH between all landuses. In rubber plantation, soil pH was commonly higher in the surface, which probably due to liming activities. Sum of bases decreased with depth and tended to be generally lower in rubber plantation.

Land-use changes and slope positions impact on the degradation of soil functions in nutrient stock within the Kalikungkuk micro watershed, East Java, Indonesia

“…The variability of soil physical properties among slope positions was expected due to differences in the thickness of material deposition from volcanic eruptions; supported by the positive correlation between clay fraction and soil bulk density at depth 10-30 cm and 30-50 cm (r = 0.58 and 0.77, p ≤0.05). Agustina et al (2016) reported that the amount of clay increased along with the increase in soil depth was found in the forest land. In addition, the positive correlation between BD and clay content was also found from the previous research conducted in Croatia forest, the western edge of the Pannonia Basin by Rubinić and Safner (2019), which means that the addition of clay is accompanied by an increase in soil BD.…”

Soil macroporosity, physical properties and nutrient leaching after forest conversion to rubber and oil palm plantation in an Acrisol of Jambi, Indonesia

“…soil carbon (Guillaume et al, 2015); soil fertility and soil physical properties in the newly established land use systems (Dechert et al, 2004;Klinge et al, 2004). These also lead to different pedogenesis processes (Agustina et al, 2016); higher leaching sensitivity (Kurniawan et al, 2018); higher runoff and erosion (Dariah et al, 2004;Mohammad and Adam, 2010), in tea plantation (Li et al, 2012), coffee-based agroforestry systems (Widianto et al, 2004), cacao (Dawoe et al, 2014), and oil palm plantation (Sunarti et al, 2008).…”