Enhancing the competitive ability of crops - Ecological Management of Agricultural Weeds - page 271

Table 6.1. Response of weeds and crop yield to increase in crop density

Yield response
to crop density

Weed response Weed- Weeds

Crop to crop density a,b free present c Reference

Barley Mann & Barnes (1947)

Mann & Barnes (1949)

Pfeiffer & Holmes (1961)

V( ) Bate,Elliott & Wilson (1970)

V( ) V( ) Cussans & Wilson (1975)

V( ) 0 0 Kolbe (1980)

Håkansson (1983)

Håkansson (1991)

V V( ) Evans et al .(1991)

Barton,Thill & Shafii (1992)

Kirkland (1993)

0 Doll,Holm & Søgaard (1995)

Doll (1997)

Bean Malik,Swanton & Michaels (1993)

Bean,snap V Williams et al .(1973)

Bluegrass, Parr (1985)

Kentucky
Cabbage Weaver (1984)

Cotton 0 Rogers,Buchanan & Johnson (1976)

V V Street et al .(1981)

Cowpea V( ) 0 Nangju (1978)

Brar,Gill & Randhawa (1984)

Cucumber Staub (1992)

Fescue,red Parr (1985)

Flax seed V( ) Robinson (1949)

V( ) Gruenhagen & Nalewaja (1969)

Stevenson & Wright (1996)

0 0 Blackshaw et al .(1999)

Lentil V V Boerboom & Young (1995)

V( ) V V Ball,Ogg & Chevalier (1997)

Lupin 0 V(I) Walton (1986)

0 Putnam et al .(1992)

Maize V( ) ( ) Nieto & Staniforth (1961)

Williams et al .(1973)

V( ,I) Choudhary (1981)

V( ) Weil (1982)

Ghafar & Watson (1983)

Brar,Gill & Randhawa (1984)

0 0 Forcella,Westgate & Warnes (1992)

Tollenaar et al .(1994a)

V( ) 0 V( ) Teasdale (1995)

[ 0 ] Murphy et al .(1996)

V Teasdale (1998)

Oat Bula,Smith & Miller (1954)

Onion

d d

Williams et al .(1973)

Pea Marx & Hagedorn (1961)

I I Lawson (1982); Lawson & Topham (1985)

V( ) V( ) Wall,Friesen & Bhati (1991)