TY  - JOUR
AU  - Hasanzadeh Aghbolaghi, Sakineh
TI  - The effect of chemical control of Echinochloa crus- galli weed at different growth stages on oil seed sunflower
 (Helianthus annus  cv. Urofloure) yield.
JO  - Agroecology Journal
VL  - 8
IS  - 3
SP  - 13
EP  - 21
PY  - 2012
DO  - 
ER  -