Table 1.2-18. Nonconventional soil additives
| Product group | Method of application | Reported action |
|---|---|---|
| Growth stimulants or regulators | Seed, soil, or plant | Promote growth, improve nutrient water uptake, or solubilize soil nutrients |
| Biological additives | Soil | Enhance soil microbial activity |
| Low-rate nutrient additions | seed or plant | More efficient nutrient use |
| Organic amendments | Soil | Provide nutrients; improve soil “tilth” |
| Mineral amendments | Soil | Substitute for lime or fertilizers |
| Soil conditioners | Soil | Improve soil drainage, soil physical properties, or nutrient release |
