| Abstrakt: |
Upstream watersheds in Sumani, is a large horticulture farming area widely cultivated by vegetables, such as cabbage, onions, potatoes etc. Due to intensive farming business activities, which tend to have an impact on the level of erodibility inherent soils, a large portion of land is destroyed by rain leading to erosion. The purpose of this study, therefore, is to determine the erosion level and determining erodibility factor on farm lands on the upstream of Sumani Watershed. The research method adopted is purposive random sampling. Furthermore, soil samples were taken in order to analyze its physical properties (texture, organic matter, structure, permeability) at a depth of 0-20 cm. The samples were analyzed in the soil Department laboratory at the Faculty of Agriculture Andalas University. Data analysis was processed using the soil erodibility equation and to determine the factors, the principal component analysis (PCA) was utilized. The results of the analysis showed the value of soil erodibility against rainfall which was determined by using its organic matter, structure and permeability. The soil was also prepared by applying the conservation method. The resh organic material of the harvest is capable of improving its durability damaged by rainfall. [ABSTRACT FROM AUTHOR] |
