Module 4:

Materials

4.4 How much is needed?

4.4.12 Wetting agents

A wetting agent is to be applied from March to September at monthly intervals. This is 7 applications in total. Each application is to use the equivalent of 600 litres of water per hectare.

What is the total quantity of water that will be required for a 7,000m2 pitch to achieve this work plan?

1. Do you need some initial help with the calculations?

The pitch area is 7,000m².

This is 0.7 of a hectare.

If the application rate for the water is 600 litre per hectare, then for the football pitch this figure must be multiplied by just 0.7.

Hopefully this helps you do the remainder of the calculation by focusing just on the required values.

2. Do you need some more help with the calculations?

So, 600 litres of water x 0.7 (for the relative size fo the pitch) = 420 litres of water needed per pitch.

Can you now work out the final quantity that is being asked for?

3. Do you need some other help with the final calculation?

So, the 420 litres for one application needs to be multiplied by the total number of applications in this work programme, which is 7: 420 x 7 = 2,940 litres.

There can be another way to arrive at a correct answer, but hopefully the above approach has been clear

1 With a wide range of products to choose from and with different variations on the interactions they can have with the soil. Check the technical specification of the product beforehand to ensure it meets your particular needs. One example is Ultraflo Advance Liquid (10-litre), which has an application rate of 25-50 litres of concentrate per hectare. A 7,000m² pitch would therefore require from 17.5-35 litres of concentrate per application.

2 You have now had plenty of practice calculating different material quantities for use of a pitch. Hopefully you have been able to relate some of the examples to your own situation. We can now move onto the next section which provides a look at some of the general costs of materials.

Module progress: 94%

4 | 4.1 | 4.2 | 4.3 | 4.4 | 4.5 | 4.6