PDC LESSON 4.12 SOIL - Testing Your Soil Texture

 

PERMA COURSE AGRO-ECONOMY

PDC LESSON 4.12 SOIL - Testing Your Soil Texture

A method of testing your soil type is to do a soil test in water. Place some soil in a jar ( 4 cm deep) and add water to about three quarters full. Put the lid on the jar and give a good shake. Allow the jar to sit undisturbed for at least 24 hours or until the water becomes clear. Depending on your soil type this can take anything from a few days to well over a week.

 

Out of a total thickness of 4 cm of soil depth, the layers of a good soil will measure something like the following:

2.1 cm

1.3 cm

0,6 cm

This will be-

45% sand and grit

33% silt

22% clay

The organic matter will be the top layer with more of it floating on top of the water. If the water remains milky or turbid, this is a suspension of very fine or colloidal clay. There are many different soil textures, but they can be divided into the following groups: see 4.13




 

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