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 length and width of a field

You measure the length or width of a field in metres.

A metre is a unit of length.

At shops you can buy a wooden folding rule, or a tape which measures exactly one metre. But you can make a metre measure for yourself. Take a stick that is quite straight, or a piece of string or rope. Take five times the length of your booklet (the bigger side of the booklet) and you will have a length of about one metre (1.05 metres exactly), because your booklet is 21 centimetres long, that is 0.21 metre (0.21 X 5 = 1.05 m). To get just one metre, take off the stick, or string or rope, the length of your thumb.

With this stick, string or rope, you can measure the length and width of your field.

As these distances are often very long, the length or width of fields is often measured with a rope or chain of 10 metres. (This rope or chain is called a decametre). If you have a rope long enough, you can yourself make a decametre. Take the metre that you made first and put it along the rope ten times. That will give you a decametre. It will enable you to measure much more easily the length and width of your field.

The extension workers or agricultural assistants sometimes have decametres. You can ask them to measure your fields.