Soil conservation protects soil from from various factors such
as erosion. The benefits of conserving soil are ensuring soil
organisms, such as the earthworm, remains unharmed. Soil
conservation also maintains a good soil PH which ensures that
things such as crops continue to grow.
The foods that are good for compost are usually things that can
decompose in soil with worms such as banana peels. This is because
the worms in your compost have to be able to decompose the things
you put in the compost.
It depends on where in Alaska. The soil around the town of
Palmer is a very rich volcanic soil and grows very good crops. The
only problem is the short season, though some folks grow some
things in greenhouses.