Explain briefly 3 farming methods and it's effects on the ecosystem

3 farming methods are:
arable farming grows crops, eg wheat and barley.
pastoral farming is raising animals, eg cows and sheep.
mixed farming is both arable and pastoral.
And it’s effects are:

Runoff often carries pesticides from farmers' fields that can damage aquatic ecosystems. A handful of farm dirt is rich in biodiversity. Soil biodiversity includes animals, bacteria, fungi and even the roots of plants growing above. ... These organisms can help farmers to reduce the negative effects of farming.

Twenty one miles per hour