TY  - BOOK
AU  - Siman,Gyula
TI  - Nitrogen status in growing cereals: with special attention to the use of plant analysis as a guide to supplemental fertilization
AV  - QK898.N6 S58
PY  - 1974///
CY  - Uppsala
PB  - Royal Agricultural College of Sweden
KW  - Nitrogen metabolism
KW  - Grain analysis
ER  -