Plant soil correlation study

Plant soil correlation study number 9, Ephedra torreyana top and root. Las Cruces, Organ Mountain drainage. The topsoil is very shallow gravelly loam, the subsoil beginning at 7 inches stony gravelly loam with slight compaction. At the 21 inch level the lower subsoil of the stony gravelly loam is reached. There is no physical barrier to root penetration, and the upper part of the lower subsoil is penetrated by many preserved black grama roots. Original photo number 146.