high quality / rich / good soil has a high number of nutrients
knowledge is good_nor_bad. diversity is good_thing. good is quality. eat_salds_because is good_source_of_nutrients. high_plasticity_soil_region is fine_grained_soil_region. common_good is good. topsoil is very_valuable_resource. good_food is foundation_for_good_health. richness is value. water has high_heat_capacity