RSA 431:1-a: Soil and Plant Additives.

"Soil and plant additives" means substances added to soils or applied to plants to improve soil nutrient content, soil structure, soil biological activity, nutrient accessibility to plants, plant microbiome characteristics, and plant uptake of nutrients, including soil applied and foliar fertilizers, limes, other mineral additives, compost, manure, soil amendments, plant amendments and plant biostimulants.