Guideline Index

Chapter 14: Calculating Rates and Costs

14.1 Introduction

Fertiliser inputs are a significant portion of the farm budget, and it is therefore important to provide the Right Source of fertiliser, at the Right Rate, in the Right Place, and at the Right Time (4Rs). Under application of nutrients can lead to reduced pasture and stock performance, while over application of nutrients can be an unnecessary waste of money.

Learning outcomes

At the completion of this chapter, you should be able to:

  • Calculate the amount of fertiliser needed to apply the required amount of nutrients.
  • Calculate the amount of nutrient applied by a particular amount of fertiliser.
  • Calculate the cost of various fertilisers, and compare fertiliser products for value.