The Multifunctionality of Technologies Sustainable agriculture involves the integrated use of a variety of pest, nutrient, soil and water management technologies and practices. These are usually combined on farms to give practices finely tuned to the local biophysical and socioeconomic conditions of individual farmers. Most represent low-external input options. Most such farms are diverse rather than specialized enterprises. Natural processes are favoured over external inputs and by-products or wastes from one component of the farm become inputs to another. In this way, farms remain productive as well as reducing the impact on the environment.