29:25

Identifying nutrient deficiencies and causes

27:17

Soybean insects in the midwest

38:06

Corn insects in the north central U.S.

31:49

Insect identification, sampling and management

17:42

A visual guide to soybean growth stages

22:47

Introduction to weed scouting

16:06

Managing Insects in Grain Storage

20:57

Corn growth and development