1:35:44

Water Management and Tree Nutrition

10:38

Soil Colloids: What Are They?

4:39

Soil Basics: Structure

1:30:59

Pruning

10:05

Arborist Exam Prep: Chapter 3 - Soil Science

1:05:58

Tree ID

8:20

All Things SOIL TAXONOMY

4:30

Understanding Our Soil: The Nitrogen Cycle, Fixers, and Fertilizer