In {HEAD ~ some embodiments}, the substrate includes a soil substrate, a topsoil substrate, {TAIL ~ a subsoil substrate}, a clay substrate, a sand substrate, a rock substrate, or a stone substrate 
In { HEAD ~ some embodiments } , the substrate includes a soil substrate , a topsoil substrate , { TAIL ~ a subsoil substrate } , a clay substrate , a sand substrate , a rock substrate , or a stone substrate
OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH