EFFECTS OF TIME OF SOWING AND WATER REGIME ON SEED YIELD OF BROAD BEANS
Large seeded broad bean (cv. Locale di Bari) was sown at a monthly intervals during November, December and January using four water regimes. Water was supplied whenever evapotranspiration reached 20 mm giving 100%, 75%, 50% and 0% of that amount. Seasonal water consumption was calculated including useful rainfalls; for 100%, 75%, 50% and 0% the values were respectively 2580–2250–1920 and 1260 m3/ha for November sowing, 1960–1680–1410 and 860 m3/ha for December and 1540–1320–1100 and 660 m3/ha for January sowing.
Seed yield averaged 5.7–5.2 and 3.0 t/ha and weight of seeds was 1.79, 1.59 a,d 1.40 g respectively for November, December and January sowing. Lenght of the pods and stems per plant were lower in the last sowing date. Irrigation by returning the 100% of the evapotranspired water increase the seed yield of about 1.8 t/ha. Water regime had no effect on number of seeds per pod, seed size and stems per plant.