Bull. Spec. CORESTA Symposium, Kallithea, 1990, p. 118, A09, ISSN.0525-6240
Full-field study of the change in nitrate levels in the sap of burley-type tobacco
CFPPT, Bergerac, France
This study involving two Burley cultivars was carried out over a three-year period (1987, 1988, 1989) in a region of the southwest of France, in about fifty growers. Nitrate tests were carried out on the cutters petiole juice every week, from the...