Effects of Soil Water Levels on Components of Growth and Yield in Peas1

Greenhouse grown peas ( Pisum sativum L. cv. Alaska) were irrigated at 4 levels with constant water conditions and with 2 water levels varied at 3 physiological stages of growth. At constant water levels total dry matter, seed yield, seed size, number of seeds per plant, plant height, watering level, and water used were positively related. Number of nodes per plant remained constant in all treatments but internode length varied in relation to water level and scheduling. Maintaining a high watering level during pod filling or flowering resulted in highest seed yields. Plant height was significantly reduced with decreasing water levels for constant water regimes At variable water regimes taller plants were evident when water was high during flowering to early pod filling.