Komalpreet Kaur, et al. “Impact of Different Phosphorus and Zinc Levels on Macronutrient Content in Cotton Grown in Alluvial Soils of Punjab, India”. Journal of the Indian Society of Soil Science, vol. 74, no. 2, July 2026, pp. 232-7, https://epubs.icar.org.in/index.php/JISSS/article/view/182087.