Simple tests for the determination of soil texture and topsoil quality
A.1Soil texture assessed by handling properties
- Moisten 10–20 g (i.e. a dessert-spoonful) of soil and knead into a firm dough—sand will feel gritty, silt will feel soft and silky, clay will be stiff and tenaciously sticky.
- By trying to form shapes in the sequence 1–5 in Table A. 1 the shape achieved furthest down the list will indicate the soil texture class.
A.2Clay content assessed by the Adams and Stewart soil-binding test (ASSB or ‘motty test’)
Because of the risk of errors in preparation it is advisable always to include a standard soil with each batch of determinations.
1.Place on a saucer a golf-ball-size sample of soil roughly 50 g (2 oz) for a mineral ...