Influence of soil on the chemistry of water in relation to productivity.

agua analyse de l'eau azote azufre calcio calcium carbonate carbonates carbonatos chemistry chimie colloids coloides eau fango fer fish ponds fosforo hierro iron lac lagos lakes mud nitrogen oxygen phosphore phosphorus potasio potassium productividad productivity silicio silicium silicon soil soil sorption sol sorption du sol soufre suelo sulphur vase water water analysis