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Fill a clear jar ~1/3 with soil then fill jar with water and a tsp non foaming dish soap or borax (helps clay settle) and shake for ~5minutes to break it all up. Sand settles at 15min, Silt after 1 hr and clay after 24hrs - ignore matter that may be floating…measure in mm’s and add all numbers together then divide each layers mm # by the total and multiply by 100 for the percentage. For example:
20mm sand + 17mm silt + 13mm clay = 50 mm total
Sand: 20mm/50=0.4 x 100 = 40%
Silt: 17mm/50 = 0.34 x 100 = 34%
Clay: 13mm/50 = 0.26 x 100 = 26%
Now that you have the percentages of each layer, find them on the texture pyramid for the texture type:
Don’t forget to check ph before dumping out the sample…this will help to see what needs to be added to build it up 