University of Tabriz Journal of Agricultural Science and Sustainable Production 2476-4310 Articles in Press 2027 10 22 The Effect of Intercropping Coriander (Coriandrum sativum) and Fenugreek (Trigonella foenum-graecum) and Weed Management on Yield and Resource Use Efficiency Indices The Effect of Intercropping Coriander (Coriandrum sativum) and Fenugreek (Trigonella foenum-graecum) and Weed Management on Yield and Resource Use Efficiency Indices 21570 10.22034/saps.2026.70064.3425 FA Fatemeh Asadi Department of Plant Production and Genetics, Faculty of Agriculture, University of Zanjan, Zanjan, Iran Majid Pouryousef Associate Professor of Zanjan university Mahsa Mohammadi Department of Plant Production and Genetics, Faculty of Agriculture, University of Zanjan, Zanjan, Iran Journal Article 2025 11 04 Background and Objectives<br />This study was conducted to investigate the effects of different intercropping ratios of coriander and fenugreek on seed and essential oil yields, as well as to evaluate the productivity and benefits of various intercropping combinations of these two plants.<br /><br />Material and Methods<br />The experiment was carried out as a two-factor factorial based on a randomized complete block design with three replications at the Research Farm of the Faculty of Agriculture, University of Zanjan, in 2022. The first factor included different additive intercropping ratios: 100% coriander + 20% fenugreek, 100% coriander + 40% fenugreek, 100% coriander + 60% fenugreek, 100% coriander + 80% fenugreek, and 100% coriander + 100% fenugreek, along with sole cropping of coriander and fenugreek. The second factor was different weed management conditions: full weed control, single weeding, and no weed control.<br /><br />Results<br />The highest leaf area index, seed yield, biomass yield, and essential oil yield of coriander were obtained from the 100% coriander + 40% fenugreek, while the lowest values were recorded in the 100% coriander + 100% fenugreek. Similarly, the highest leaf area index, seed yield, and biomass yield of fenugreek were observed in sole cropping, and the lowest in the 100% coriander + 20% fenugreek.<br /><br />Conclusion<br />The findings of this study indicate that in organic coriander production, lower densities of fenugreek in intercropping systems can serve as a suitable approach to enhance seed and essential oil yield of coriander. Background and Objectives<br />This study was conducted to investigate the effects of different intercropping ratios of coriander and fenugreek on seed and essential oil yields, as well as to evaluate the productivity and benefits of various intercropping combinations of these two plants.<br /><br />Material and Methods<br />The experiment was carried out as a two-factor factorial based on a randomized complete block design with three replications at the Research Farm of the Faculty of Agriculture, University of Zanjan, in 2022. The first factor included different additive intercropping ratios: 100% coriander + 20% fenugreek, 100% coriander + 40% fenugreek, 100% coriander + 60% fenugreek, 100% coriander + 80% fenugreek, and 100% coriander + 100% fenugreek, along with sole cropping of coriander and fenugreek. The second factor was different weed management conditions: full weed control, single weeding, and no weed control.<br /><br />Results<br />The highest leaf area index, seed yield, biomass yield, and essential oil yield of coriander were obtained from the 100% coriander + 40% fenugreek, while the lowest values were recorded in the 100% coriander + 100% fenugreek. Similarly, the highest leaf area index, seed yield, and biomass yield of fenugreek were observed in sole cropping, and the lowest in the 100% coriander + 20% fenugreek.<br /><br />Conclusion<br />The findings of this study indicate that in organic coriander production, lower densities of fenugreek in intercropping systems can serve as a suitable approach to enhance seed and essential oil yield of coriander.