Heitholt, J. J., and J. J. Sloan. “Enhancement of Vegetable Crop Growth With Biosolids and Yard-Waste Compost on a Calcareous Clay Soil”. Texas Journal of Agriculture and Natural Resources 19 (May 4, 2016): 80–92. Accessed April 24, 2024. https://txjanr.agintexas.org/index.php/txjanr/article/view/114.