Weeds and the soil environment - Ecological Management of Agricultural Weeds - page 232

Hoffman, Regnier & Cardina (1993) a

Mower Roller Roller with blades

Early Mid Late Early Mid Late Early Mid Late

bud bloom bloom bud bloom bloom bud bloom bloom

Hairy vetch,1990 poor fair excellent poor poor excellent - - -

Hairy vetch,1991 poor excellent excellent poor fair excellent poor good excellent

Dabney, Buehring & Reginelli (1991) a

Flail mower Roller coulters at 10 cm Roller coulters at 20 cm

Early Mid Early Early Mid Early Early Mid Early

April April May April April May April April May

Hairy vetch fair fair excellent poor fair excellent poor poor excellent

Crimson clover fair fair excellent poor poor fair poor poor poor

Subterranean clover poor poor fair poor poor poor poor poor poor

Berseem clover poor poor fair poor poor poor poor poor poor

Wilkins & Bellinder (1996) b

1992 1993

First node Second node 75% head Milky kernel First node Flag leaf In boot Watery kernel

Wheat poor fair good excellent poor fair fair excellent

1992 1993

First node In boot 100% head Second node In boot 100% head Watery kernel

Rye poor good excellent fair fair good excellent

Notes:
a Ratings based on percentage killed: excellent,

85% control.
b Ratings based on amount ofregrowth 4 weeks after treatment: excellent, 50 kg ha 1 ; good,50-200 kg ha 1 ; fair,200-1000 kg ha 1 ; poor, 1000 kg ha 1 .

98% control; good,95% to 98% control; fair,85% to 95% control; poor,