Note C — Chapter XIII · Billy Tests the Soil
Reading edition
Manure should be well rotted, otherwise plants cannot make use of it, for they must have food that has been “broken down,” so that the plant roots can take up what they need.
Manure that is rotted has been piled up and left out in the weather with a board or two for cover to shed water. The pile has been turned over once a month, and dampened when dry.