TY  - TH
AU  - Izgin,C.N.
TI  - Determining the phosphorus fertilizer needs for soils of the high plains in Oklahoma
PY  - 1973///
CY  - Oklahoma, OK (USA)
PB  - Oklahoma State University, 
KW  - Crops
KW  - AGROVOC
KW  - Experimentation
KW  - Farms
KW  - Phosphorus
KW  - Soil chemistry and physics
KW  - Sorghum
KW  - Wheat
KW  - Soil fertility
ER  -