TY  - BOOK
AU  - Beaufils, E. R.
TI  - Diagnosis and recommendation integrated system (DRIS)
T2  - Soil science bulletin
PY  - 1973///
CY  - Pietermaritzburg, Natal
PB  - University of Natal. Department of Soil Science
KW  - DiagnÃ³stico foliar
KW  - MÃ©todo DRIS
KW  - Plantas
KW  - Elementos minerales
KW  - NutriciÃ³n
ER  -