J. Barker

The effects of day and night humidity on yield and quality of glasshouse cucumbers

J. V. Uffelen, J. Barker, G. Welles, 1987 .

Common carp (Cyprinus carpio) breeding in Nigeria

J. Barker, 1994 .

Effects of day and night humidity on yield and fruit quality of glasshouse tomatoes (Lycopersicon esculentum Mill.)

J. C. Barker, J. Barker, 1990 .

Calcium deficiency of glasshouse cucumber as affected by environmental humidity and mineral nutrition

C. Sonneveld, J. Barker, 1988 .

Preliminary studies on the breeding systems of Dryopteris filix-mas (L.) Schott and D. dilatata (Hoffm) A. Gray

J. Barker, A. Willmot, 1985 .

Russeting (cuticle cracking) in glasshouse tomatoes in relation to fruit growth

J. C. Barker, J. Barker, 1988 .