TY  - JOUR 
T1  - Tillage systems and cover plants change organic fractions of phosphorus in oxisol of eastern Amazonia
JO  - Bragantia
A1  - Guedes, Rafael Silva
A1  - Alleoni, Luís Reynaldo Ferracciú
A1  - Correia, Benedito Luiz
A1  - Alves, Luis Wagner Rodrigues
A1  - Ramos, Sílvio Junio
A1  - Fernandes, Antonio Rodrigues
SN  - 0006-8705
UL  - 10.1590/1678-4499.20200047
VL  - 79 
Y1  - 2020
PB  - Brasil 
ER  -