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2 results on '"Loannisa, Setia"'

1. Impact of Cover Crops on Reducing the Potential Erosion in Agricultural Land

Author

Andalas University, Loannisa, Setia, Saidi, Amrizal, Fiantis, Dian, Andalas University, Loannisa, Setia, Saidi, Amrizal, and Fiantis, Dian

Abstract

A study about the utilization of cover crops on reducing the potential erosion in agricultural land was conducted from October 2016 to Februari 2017. This study was aimed (1) to examine the effect of vetiver (Vetiveria zizanioides), king grass (Pennisetum purpuroides), elephant grass (Pennisetum purpureum), and tree marigold (Tithonia diversivolia) cultivation on soil physical properties and reducing erosion rate, and (2) to identified the root development stage of Vetiveria zizanioides with different age affect the root system. The experiment was designed with a completely randomized layout with three replications using five treatments. The soil physical characteristics and plant data were statistically analyzed with analysis of variance (ANOVA) and followed by Tukey`s test. The results showed that there was no significant effect from the cultivation of cover crops to soil physical characteristics. However, the cultivation of cover crops to the soil was effective to decrease the rate of run off and reduced the potential erosion. The experiment revealed that the elephant grass has significant effect in decreasing rate of run off and amount of soil loss.

Published
2019

2. Reducing Runoff and Erosion to Improve the Strength of Soil Derived from Pumice Tuff in Patamuan, West Sumatra, Indonesia.

Author

Saidi, A., Adrinal, Loannisa, Setia, and Fiantis, D.

Subjects
PUMICE, LANDSLIDES, SOIL erosion, SOIL macropores
Abstract

Erosion and landslides that occur in volcanic areas of Indonesia are crucial problems that cannot be overcome completely. This study was designed to determine the ability of different plant types to reduce water runoff and soil erosion and improve soil physical properties. Soil samples were taken from landslideprone areas in Patamuan, West Sumatra. Plots created from steel plates of 1.5 x 0.5 x 0.3 m in dimension and set at 22° angle, were placed in the greenhouse and a rain simulator was used to irrigate the plots. The experiment was a completely randomised design with three replications. The plant types were Tithonia shrub, vetiver, king grass and Napier grass. Results showed that runoff and soil erosion were reduced from 93 to 74 liter/m2, and from 1.03 to 0.17 kg/m2, respectively. Planting Tithonia decreased runoff while Napier grass reduced soil erosion. Soil moisture content at field capacity increased from 14% to 20%, and macropores from 31% to 41%; however there was a decrease in micropores from 17.5% to 14%. King grass increased root density (RD) and root area ratio (RAR), but reduced the relative soil particle detachment rate (RSD). King grass and vetiver had a positive impact on reducing both runoff and soil erosion. [ABSTRACT FROM AUTHOR]

Published
2020

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