TY  - JOUR 
T1  - EVALUATION OF PHOSPHORUS REQUIREMENT BY THE SORPTION ISOTHERM TECHNIQUE IN SOILS AMENDED WITH ORGANIC MATERIALS 
JO  - Revista Brasileira de Ciência do Solo
A1  - BERTON, R. S.
A1  - PRATT, P. F.
SN  - 0100-0683
UL  - 10.36783/18069657rbcs19972005
VL  - 21 
Y1  - 1997
PB  - Brazil 
ER  -