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406 PROCEEDINGS OF INTERNATIONAL SCIENTIFIC CONFERENCE ON APPLIED BIOTECHNOLOGYfertilization approach to enhance peanut productivity through improved pod formation and weight.Figure 4. Peanuts harvested from the widespread modelin 2024 in Quang Tri Province (A) Peanuts harvested from the model applying multifunctional biological products for soil improvement(B) Peanuts harvested from the model cultivated according to the local farmers%u2019 practices3.5. Economic efficiency of multifunctional biological products for soil improvement on poor soil used for peanutsAssessing the effectiveness of applying biological products for crops in general and the Sen Lai peanut variety, in particular, is essential for evaluating economic efficiency.Table 6. Economic efficiency of multifunctional biological products for soil improvement on poor soil used for peanuts (Arachis hypogaea l.) in Quang Tri provinceIndicatorsMH1 MH2(VND/ha) (VND/ha)Investment costs 47,161,000 34,026,000Total revenue 72,704,000 88,896,000Net profit 25,543,000 54,870,000Value cost ratio 0.54 1.61 Note: Economic efficiency = Net profit