Soil type, previous crops, rainfall totals, weed levels and application methods are just a few of the many interacting factors that need to be considered when making decisions about how to manage your crop's nutrition.

This module focuses on information that will help you make profitable and sustainable nutrient decisions.

Unit 3.1 starts with an overview of the many factors that will influence your nutrient decisions, examines how to use soil tests to guide nutrient decisions and outlines the 10 macro nutrients required by plants.

Unit 3.2 introduces the concept of soil acidity and the role of liming,

Units 3.3 through 3.7 focus on the major nutrients of phosphor, potassium, sulphur, nitrogen and the role trace elements in plant growth.

Unit 3.8 looks at the role of water storage and nutrients, including discussions of soil water holding capacity, waterlogging and drainage, soil pH and nutrient analyses.