TY  - JA
AU  - Barker,S.
TI  - Calibration of olsen soil phosphorus test values with the phosphorus fertilizer requirement of sugar beets under Turkish soil and cultural conditions
U1  - 78-277878 
PY  - 1977///
KW  - Fertilizers
KW  - AGROVOC
KW  - Sugar beet Beta vulgaris
KW  - Turkey
KW  - Soil fertility
N1  - Map. Ref
T2  - Soil Science
ER  -