Mentha arvensis and Populus deltoides are extensively cultivated in prime agriculture land of Terai and the Indo-Gangetic region. The investigation was carried out by taking four varieties of menthol mint under poplar based agroforestry and open farming system to evaluate the interaction effect on growth, yield and economic parameters of mint varieties. The growth and yield parameters of crop were recorded maximum under open farming system. The maximum total fresh herbage and oil yield were found more in Kosi and CIM Kranti varieties, respectively. Oil content of 1.21 and 1.27% was found maximum in CIM Kranti variety at 1st and 2nd harvest under open farming system. Total oil yield of 186 l ha⁻¹ was maximum under open farming system and 73 l ha⁻¹ under poplar based agroforestry system. Integration of menthol mint with poplar increased the average increment in diameter at breast height (+ 4.1 %), height (+ 4.7 %) and volume (+ 12.3 %) of poplars. Gross returns of ₹ 2,36,227 ha^-1 and net returns of ₹ 1,45,073 ha^-1 were obtained from variety CIM Kranti from silvi-medicinal system. The maximum B:C ratio of respectively 3.30 and 1.59 were obtained for CIM Kranti variety under open farming and poplar based agroforestry systems.

Mentha arvensis和Populus deltoides在 Terai 的主要农田和印度恒河地区广泛种植。本研究以杨树为基础的农林业和开放式耕作系统下的四个薄荷薄荷品种进行了调查，以评估薄荷品种对生长、产量和经济参数的相互作用影响。在开放式耕作系统下，作物的生长和产量参数最大。Kosi 和 CIM Kranti 品种的新鲜牧草和油料总产量最高，分别。在开放式耕作系统下，CIM Kranti 品种在第 1 次和第 2 次收获时的含油量最高，分别为 1.21% 和 1.27%。^{186 l ha -1}的总石油产量在开放式耕作系统下最高，73 l ha ^-1在以杨树为基础的农林业系统下。薄荷醇薄荷与杨树的结合增加了杨树在胸高 (+ 4.1 %)、高度 (+ 4.7 %) 和体积 (+ 12.3 %) 处的平均直径增量。silvi-medicinal 系统的品种 CIM Kranti 获得了2,36,227 公顷^-1卢比的总回报和 1,45,073 公顷^-1卢比的净回报。在开放式耕作和杨树混农林业系统下，CIM Kranti 品种的最大 B:C 比分别为 3.30 和 1.59。