Keith R. Baldwin Creamer, N. G., & Baldwin, K. R. (2000). An evaluation of summer cover crops for use in vegetable production systems in North Carolina. HortScience, 35(4), 600–603. Baldwin, K. R., & Shelton, J. E. (1999). Availability of heavy metals in compost-amended soil. BIORESOURCE TECHNOLOGY, 69(1), 1–14. https://doi.org/10.1016/S0960-8524(98)00174-6