Sidhu, Mandeep Kaur, et al. “Effect of Foliar Application of Boron, Iron and Zinc on Growth, Yield and Economics of Cucumber Grown under Naturally Ventilated Polyhouse Condition”. Vegetable Science, vol. 47, no. 01, June 2020, pp. 110-5, https://doi.org/10.61180/vegsci.2020.v47.i1.19.