Effect of planting distances and Humic Acid application on some vegetative growth and yield of Broad bean (Vicia faba L. var. Somar) in outdoor condition

Abstract

The seeds of the Somar variety (local production) were planted in mid of October (after being soaked with water for 16 hours) in panels 1.5 x 2 meters. Broad bean (Vicia faba var. Somar) was studied in outdoor to determine the effect of three planting distances (20, 25 and 30 cm), four different Humic Acid (HA) concentration doses (zero, 1.5, 3.0 and 4.5) ml / liter H2O, with three replicates on some of the plant’s vegetative and yield traits; Plant Height (cm), Plant Diffusion (cm), Number of Branches /Plant, Number of Flowers / Plant, Number of Pods / Plant, % percentage of Pods Set, Total Pods Yield /plant (gm), Pod Weight (gm). The (HA) were added by spray way directly to the top of the soil with two applications, the first after 3 weeks from complete germination, while the second after branching immediately. The experiment was designed as Randomized Complete Block Design (RCBD). Based on Total pods yield / plant (gm), the best interaction between the plant distance and different concentration of (HA) was a combination of the planting distance 30 cm, and treated the soil with 3.0 ml/ literH2O.

Effect of Weed Control Treatments and Row Spacing on the Yield and its Components of Faba Bean and Companion Weeds

“…The reason for the decrease is due to the increase in the number of plants per unit area and thus the increase in competition between the crop plants for light and nutrients, which led to a decrease in the chlorophyll index in the leaves (Table 3), and their low efficiency in absorbing light, and then the decrease in the effectiveness of photosynthesis and the transmission of its products to the emerging flowers, which reduced the proportion of fruit set in them and thus the decrease in the number of pods in the plant. This result agrees with [11][12][13][14], they found that higher plant densities resulted in fewer pods per plant. No statistically significant interaction was found between the study parameters and this characteristic, either.…”