Meghan Barnard

This review is a response to a published paper by Mitchell et al. (2024): Elaine Mitchell, Naoya Takeda, Liam Grace, Peter Grace, Ken Day, Sahar Ahmadi, Warwick Badgery, Annette Cowie, Aaron Simmons, Richard Eckard, Matthew Tom Harrison, William Parton, Brian Wilson, Susan Orgill, Raphael A. Viscarra Rossel, David Pannell, Paige Stanley, Felicity Deane & David Rowlings. 2024. Making soil carbon credits work for climate change mitigation.

1 Introduction Sulfur (S) is one of the four essential macronutrients for plant growth and is necessary for many functions such as the synthesis of chlorophyll and the formation of essential amino acids such as cysteine and methionine (Narayan et al. 2023). Within the soil environment, S occurs in both inorganic and organic forms, with plants taking up S in the inorganic form as sulfate (Scherer 2009). Although 95%–98% of S is in the organic form in most soil environments (Solomon et al.