TY  - BOOK
TI  - Bibliography on magnesium, nitrpgen, phosphorus and sulphur levels in crops showing deficiency symptoms (1963 - 1956)
T2  - Commonwealth Bureau of Soils;No.647
U1  - 016:631.81.095.338:631.811.1' 2' 6' 7:633 1956/63 K3 
PY  - 1963///
CY  - England
PB  - Commonwealth Bureau of Soils
KW  - Magnesium,Nitrogen,Sulphur,Phosphorus,Soil science
ER  -