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[[Category:Glossary]]  [[Category:Turf]][[Category:Sportsturf]]


1. An [[inorganic]] soil [[amendment]] formed by expanding clay at high temperatures (calcining), and used to alter soil strength by affecting its ability to retain moisture.<br><br>

http://generalhorticulture.tamu.edu/h202/labs/lab7/calcinedclay-b.jpg<br><br>
Calcined clay grains.<br> 
Source: http://generalhorticulture.tamu.edu/h202/labs/lab7/inorganic.html<br><br>