Enhancing the competitive ability of crops - Ecological Management of Agricultural Weeds - page 284

Table 6.2. Response of weeds and crop to decrease in crop row spacing at constant crop
density

Yield response to
narrower rows

Weed response Weed- Weeds

Crop to narrower rows a free present Reference

Barley V V( ) Bate,Elliott & Wilson (1970)

V( ) 0 0 Cussans & Wilson (1975)

V( ) 0 0 Barton,Thill & Shafii (1992)

Kirkland (1993)

Bean V Malik,Swanton & Michaels (1993)

Bean,snap V( ) V( ) Teasdale & Frank (1983)

Cereals b Håkansson (1984)

Cotton V( ,0) Miller,Carter & Carter (1983)

Brown,Whitwell & Street (1985)

Flax seed 0 Alessi & Power (1970)

Stevenson & Wright (1996)

0 0 Blackshaw et al. (1999)

Lupin Putnam et al .(1992)

Maize V( ,I) V Choudhary (1981)

0 V Weil (1982)

Harvey & McNevin (1990)

[ ] Murphy et al .(1996)

0 V( ) Johnson,Hoverstad & Greenwald (1998)

0 0 Teasdale (1998)

Rambakudzibga (1999)

Oat Pendleton & Dungan (1953)

Peanut V Colvin et al .(1986)

Pearl millet Limon-Ortega,Mason & Martin (1998)

Pigeonpea 0 0 0 Díaz-Rivera et al .(1985)

Rapeseed 0 0 0 O'Donovan (1994)

Safflower V(0) 0 0 Blackshaw (1993)

Sorghum 0 c

c

V c Burnside,Wicks & Fenster (1964)

V V( ) Wiese et al .(1964)

V V( ) Holland & McNamara (1982)
Limon-Ortega,Mason & Martin (1998)

Soybean V( ) c V( ) c V( ) c Burnside & Colville (1964)

0 0 0 Peters,Gebhardt & Stritzke (1965)

V( ) 0 0 Burnside (1979)

0 Walker et al .(1984)

Murdock,Banks & Toler (1986)

0 Patterson et al .(1988)

d d

Légère & Schreiber (1989)

V 0 Shaw,Smith & Snipes (1989)

Yelverton & Coble (1991)

V( ) Mulugeta & Boerboom (1999)

Sunflower V(0) Woon (1987)

Sweet corn Harvey & McNevin (1990)