The project Sensible Fertilising (JärkiLannoite) worked out an interactive learning environment with materials on nutrient recycling at farms for vocational colleges. The material is visual and pedagogical. Learning about the material starts from a front page picture. You can click on several objects at the farm and go deeper in getting information about nutrient recycling.

The front page of the interactive learning environment.

If you click on the horse it will take you to the page about horse manure. You can see how much nitrogen and phosporous one cubic meter of horse manure contains. You can also see how many horses produce one cubic meter of manure in a week. The horse manure basic characteristicas and use are also described.

An example from the virtual learning environment – horse manure.

The environment is only in Finnish (link)