The enhanced water retainer concept will be built on a biodegradable water retainer product helping the ground in maintaining a steady water balance by reducing evaporation. The water retainer is an organic soil conditioner helping plants to take-up water and diminish the effects of drought and dehydration. WATERAGRI will use this product in different conditions and provides the research background to the product development activities by investigating the effects of the water retainer product on the soil ecosystem using molecular biology methods. Furthermore, our WVSI-WRC model will be used to model and characterise the performance of the biodegradable water retainer product to help improve its design and quality. An enhanced water retainer product and concept by combining the retainer with other solutions will be the outcome of WATERAGRI.