Certified Professional Horticulturist (CPH) Practice Exam

Commercial composting is typically done by laying out compostables in long rows called?

1. Compost Columns

2. Feedstock Rows

3. Windrows

4. Humus Line

The correct answer is: Windrows

The term "windrows" refers specifically to the method used in commercial composting where materials to be composted are arranged in long, narrow rows. This configuration allows for better air circulation, essential for the aerobic decomposition process, and facilitates easier turning of the compost. The shape of windrows helps in managing temperature and moisture levels within the compost material, promoting efficient microbial activity essential for breaking down organic matter into compost. Additionally, windrows can be built up in just the right manner to control the size and aeration, increasing the effectiveness of composting on a larger scale. The other options do not accurately reflect the established terminology used in composting practices. For instance, "Compost Columns" and "Humus Line" are not standard terms used in the industry. "Feedstock Rows," while somewhat intuitive, does not capture the specific nature of the windrow structure that enhances the composting process.