NAS 925 1987 Rate and timing of nitrogen and effect of growth regulators on oilseed rape
NAS 925 1988 Rate and timing of nitrogen and effect of growth regulators on oilseed rape
NAS 925 1989 Rate and timing of nitrogen and effect of growth regulators on oilseed rape
NAS 971 1995 Disease control and growth regulators for winter oilseed rape
NAS 971 1996 Disease control and growth regulators for winter oilseed rape
NAS 971 1997 Disease control and growth regulators for winter oilseed rape