THE EFFECT OF IRON AND BORON FOLIAR SPRAY ON YIELD AND QUALITY SEEDS OF SOYBEAN

Abstract

A field experiment was carried out during summer season of 2018 at research Station of Field Crops Department - College of Agricultural Engineering Sciences - University of Baghdad / Jadriyah in order to determine the effect of different concentrations of iron and boron at different growth stages on yield and quality of soybean seeds. Randomized complete block design (RCBD) arranged according to split plots used at three replicates. The main plots include sprayed stage (V5, R1, R3 and V5 + R1 + R3), while the sub-plots include foliyr nutrient (Fe spraying at 150 mg Fe L-1, Boron sprayed at 200 mg B L-1 and Fe spraying at 150 mg Fe L-1 +Boron sprayed at 200 mg B L-1) comparing with control treatment (distilled water spraying).The results showed that the sprayed of Fe + B gave highest means of No. of pods (209.9 pod plant-1), No. of seeds (2.73 seed pod-1), seed yield (3.815 ton ha-1) and protein percentage in seed (40.89%), and gave lowest means of wrinkled seed percentage (9.02%), whereas the control treatment gave highest means of 100 seeds weight (11.77 gm) and oil percentage in seed (20.64%).The sprayed plant at three growth stages (V5 + R1 + R3) gave highest means of No. of pods (191.8 pod plant-1), No. of seeds (2.57 seed pod-1), seed yield (3.562 ton ha-1) and protein percentage in seed (38.89%), and gave lowest mean of wrinkled seed percentage (9.73%) without significant difference with sprayed plant at V5, while the sprayed plant at pods initiation stages (R3) gave highest means of 100 seeds weight (11.59 gm) and oil percentage in seed (20.42%). The interaction between two factors was significantly effect on all characters. However, Fe + B spraying at the vegetative growth stage (V5) gave lowest means of 100 seeds weight,wrinkled seed percentage and oil percentage in seed, and gave highest means of No. of pods, seed yield (4.162 ton ha-1). Also, Fe + B spraying at the three growth stage gave highest means of No. of seeds and protein percentage in seed.