A sediment trap with bamboo materials can be utilized as one alternative of eco-friendly technology to reduce the ero-sion that occurred on agricultural land. This study aims to determine the most efficient form of that sediment trap in the field. Location study is in the Tulungrejo Village, Batu, Indonesia, which has andosol soil type and 35 cases of a landslide in 2013. Three forms of sediment traps were used (square, trapezoidal, and stratified type) with the purpose to find the most effective form. It is obtained that the most effective sediment trap is a stratified form with the 31.91% effectiveness or able to withstand sediment of 25.02 kg, while the adequate number is two pieces with the ability to withstand the most consider-able sediment of (91.70%). Therefore this stratified form of sediment traps is effective in erosion prevention on agriculturalland in the study area. For further development, it is required to test out the variations of the contents in a broader area with a more varied level of the slope.

Biobased hydrogels are three-dimensional polymeric matrices with a unique high water-holding capacity, which are mainly obtained from polysaccharides and proteins. Such a variety of natural polymer structures offers a range of hydrogel products with interesting physicochemical and biological properties. Nowadays, these matrices are already used in many industrial and environmental fields, which is considered extremely important. Moreover, the literature on the subject is constantly expanding, especially in areas of scientific research. The main purpose of this article is to briefly review the current development of matrices composition and properties of hydrogels of natural origin, considered as functional platforms in three application areas, primarily in biocatalysis, nutrition and medicine. The description of individual issues in the present article is supported by examples of case studies described in our previously published research papers, as well as considered in current projects of our research group.