Better Farming Series 10 - The Farm Business Survey (FAO - INADES, 1976, 38 p.)
 Part 2 - The farm business survey
 (introduction...) Why make a farm business survey? A farmer should know the size of his fields How to reckon the length and width of a field How to reckon the area of a field How to measure the weight of a harvest How to reckon the yield per hectare How to reckon receipts Explanations to help in answering the questionnaire

### How to reckon the area of a field

The area of a field is measured in square metres (m²).

To reckon the area of a field that has the shape of a rectangle, multiply the length in metres by the width in metres.

Area of a field = length x width

Example: I have a field which is 54 metres long and 22 metres wide; the area of the field is

54 m x 22 m = 1 188 m². I have another field which is 187 m long and 84 m wide; the area of the feed is

187 m x 84 m = 15 708 m². I have a garden which is 21 m long and 8 m wide; the area of my garden is 21m x 8m= 168 m².

Usually, to measure the area of a field, we use another unit of measurement which is more useful than m². This is the hectare (ha). A hectare equals 10 000 m². It is the area of a square field, the four sides of which are each 100 metres long.

How to change into hectares the area off a field given in m².

You simply put in a decimal point four places back, thus:

15 708 m² = 1.5708 ha
1 188 m² = 0.1188 ha
168 m² = 0.0168 ha