Abstract

A field experiment was conducted at Alwardea farms in Babylon governorate during winter season i. e. 2014–15. The experiments were conducted in silty clay soil to investigate the effect of population density and organic manure on growth and yield of broad bean-Spanish cultivar (Barcelona). Three poultry residue levels (0, 2 and 4 t/ha) and three levels of plant population (180.000, 240.000 and 300.000 plants/ha) were used. RCBD factorial experiment method was followed with three replicates. The results showed that there was a significant difference in organic residue levels. From the results, it was inferred that addition with 4 t/ha was the best choice for optimum plant height, number of branches, chlorophyll content, weight of 100 grains, and total yield when compared to control samples which resulted in low means of the studied parameters. On the other hand, the results revealed a significant difference between the planting density in all growth and yield indicators. The optimum planting density was 180.000 plants/ha in which the number of branches, chlorophyll content in leaves, weight of 100 seeds and total yield (2710 kg/ha) were achieved. The interaction treatment (4 t/ha and 180.000 plants/ha) was significant in all the interactions.