Nitrogen Management of CDC Pintium

Introduction

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CDC Pintium pinto bean is a newer high yielding, early maturing, type I upright dry bean variety suitable for Saskatchewan's short growing season.

Producing quality seed of this variety under irrigated conditions requires identifying production practices that optimizes yield of quality seed.

Optimizing dry bean yield requires the proper balance between nitrogen fertilizer application and N fixation (Kerr, 1972; Westermann et al., 1981). Dry bean yield components (yield/plant, pods/plant, seed size) have been shown to respond to nitrogen fertilizer application (Edje et al., 1975).

Considerable variability in beans' N fixation has been reported with type IV (indeterminate, climbing) plants fixing more than type I plants that have a determinate, upright growth habit (Graham, 1981). Later maturing bean types have been found superior to earlier maturing types for both total end of season N fixed and Naccumulation rate (Piha and Munns, 1987). Individual varieties have also been shown to respond differently to N fertilizer (Westermann et al., 1981).