WI SB78

Creates new definitions in Wisconsin law for "beneficial substance" (non-nutrient substances that improve plant nourishment or soil properties), "vermicompost" (compost produced using earthworms), and "typical analysis" (analysis based on average substance amounts)

Exempts fertilizers made from unmanipulated animal or vegetable manure converted into compost or vermicompost from the requirement that mixed fertilizers contain at least 24% combined nitrogen, phosphate, and potash

Allows manure-based compost and vermicompost fertilizers to use "typical analysis" labeling instead of guaranteed analysis for plant nutrients and beneficial substances, provided claims are scientifically validated

Prohibits the Department of Agriculture from requiring controlled experimental field tests to substantiate claims for compost-based soil or plant additives

Prevents the department from requiring guaranteed analysis when typical analysis is used to substantiate label statements for compost-based soil or plant additives