Students read how to determine and calculate the dry density for a given sample of soil or aggregate based on the mass-volume relationship.

This interactive learning object demonstrates how the moisture content is determined for a given sample of soil or aggregate.

Learners listen to an explanation of balance sheet basics for farm operations. They then determine how purchases should be listed in a farm record book and complete sample income and expense sheets.

By the end of this module, you’ll be able to:

- List four categories of disease agent sources

- Discover conditions when disease transmission is likely to occur

- Describe the means of disease transmission in a given situation