Tobosa roots immediately below surface showing beginning of roots that extend diagonally outward for 10 to 25 inches then turn downward and penetrate to a depth of 71 inches at Plant Soil Study number 7. Original photo number 137.
Description: Tobosa roots immediately below surface showing beginning of roots that extend diagonally outward for 10 to 25 inches then turn downward and penetrate to a depth of 71 inches at Plant Soil Study number 7. Original photo number 137.
