Adequate information about relationships between leaf area index and grain dry weight with oil and protein concentrations will help researchers to improve the effectiveness of breeding methods. Therefore, in order to investigation of the relationships between leaf area index and pod dry weight with oil and protein contents in soybean seed, a field experiment was conducted in Kermanshah, Iran during 2010 growing season. The experimental design was randomized complete blocks in split plots arrangement with three replications. Treatments included four different regimes of irrigation in main plot and eight foliar treatments were allocated as subplots. At effective seed filling period stage, five plants were selected from each plot, randomly, and leaf area index was measured. Also, at harvesting time, pod and grains dry weight, oil and protein content were determined. Based on results obtained, the highest pod dry weight (PDW), grain dry weight (GDW), and oil content were belonged to I1 treatment. In addition, withholding irrigation at flowering stage (I2) had the greatest impact on reducing oil content. In different irrigation regimes, oil content and GDW were positively, and protein concentration was negatively related to LAI. In different irrigation regimes, unlike protein content, oil concentration showed a significant increase as GDW from low up to high. Results of this study showed that relationship between oil and protein contents was slightly affected by irrigation and micronutrient fertilization. Furthermore, zinc application had the most impact on oil and protein percent and increased these trials up to 19.51% and 38.78%, respectively.