Physical Constraints to Root Growth in Savanna Oxisols. A Synthesis of Investigations Conducted Under the Collaborative Agreement between Cornell University and the Cerrado Agricultural Research Center, CPAC / EMBRAPA
TropSoils Bulletin no. 91-01
Stoner, E.R.; Freitas Jr., E. de; Macedo, J.; Mendes, R.C.A.; Cardoso, M.; Amabile, R.F.; Bryant, R.B.; Lathwell, D.J.
Soil Management Collaboration Research Support Program, North Carolina State University, Raleigh.