Humic acid in agriculture: soil inputs and crop-use checks
Run a replicated strip trial before bringing biostimulant products into the whole operation. Compare treated strips with untreated strips using the same soil, crop and field operations.
Identify the material behind the commercial name
Humic acid use in agriculture starts from what the material is: humic and fulvic acids are components of soil organic matter from decomposed plant, animal and microbial residues. These biostimulants differ from seaweed extracts and products containing beneficial organisms. When you compare products, check that the evidence is for the same material.
Read a trial report beyond its headline
Much biostimulant information concerns high-value horticultural crops rather than corn-soybean systems. Responses vary with weather, soil type, organic matter, tillage and rotation.
Evaluate humic products within the whole soil-management system
Manage soil health by minimizing disturbance and maximizing cover, biodiversity and continuous living roots. Reduced tillage, cover crops and diverse rotations support these goals.
Ortho salicylic acid use in agriculture: what the research shows
Salicylic acid is a hormonal regulator of the plant immune system.
In the bean pathogen Pseudomonas savastanoi pv. phaseolicola, exposure to salicylic acid changed bacterial systems involved in handling the chemical and enzymes relevant to infection and metabolism. Quantitative analysis of 2,185 proteins found changes in efflux systems, porins, secretion-related components and metabolism.
Greenhouse pretreatment of tomato seedlings
Potted tomato seedlings pretreated with salicylic acid showed protection after exposure to phytoplasma-infected graft material. The protective response was attributed to systemic acquired resistance.
Pretreated seedlings were compared with an untreated control group, both for visible disease symptoms and for phytoplasma DNA in leaf samples.
Potassium permanganate in agriculture: use and safety checks
Potassium permanganate regenerates manganese-greensand well-water filters. The water-treatment instructions here concern household drinking-water equipment.
Name the system and intended purpose
Before choosing treatment for a manganese-greensand water system, check the water test, equipment make and model, operating manual and maintenance history. Test water before buying treatment equipment and select the system for the contaminants found.
Understand the filter-regeneration example
A manganese-oxide coating oxidizes hydrogen sulfide; the filter then captures the solid particles. When the coating's oxidizing capacity declines, potassium permanganate can regenerate or recoat the medium.
Keep residual and maintenance checks explicit
Potassium permanganate should not remain in treated water. A faint pink color indicates its presence. Follow the specialized filter's manufacturer instructions precisely.
Concentrated potassium permanganate is poisonous and irritates skin. Store it in its original container away from children and animals.
Keep your spray records in one place. Free to start.
Hydrogen peroxide for agricultural use: ZeroTol handling and application limits
ZeroTol 2.0 is an algaecide, bactericide and fungicide containing hydrogen peroxide and peracetic acid. Its EPA registration is 70299-12. Obtain the applicable standard or California label from the manufacturer’s product page.
The linked safety data sheet is SDS 6000, version 1, dated April 9, 2025. The concentrate causes severe skin burns and eye damage. Keep it with the product identity and emergency information.
Wear protection for the task
For handling undiluted product, wear coveralls over a long-sleeved shirt and long pants, rubber gloves, chemical-resistant footwear plus socks, and goggles or a face shield. For handling diluted product, wear a long-sleeved shirt, long pants, shoes and socks.
Discard absorbent materials drenched or heavily contaminated with the product. Wash PPE separately from other laundry, following its manufacturer’s cleaning instructions. When those instructions are unavailable for washable items, use detergent and hot water. Wash the outside of gloves before removing them.
Distinguish greenhouse entry from field entry
For fogging or spraying in enclosed glasshouses and greenhouses, the restricted-entry interval is one hour. Permitted early entry involving contact with treated plants, soil or water requires coveralls over a long-sleeved shirt and pants, waterproof gloves, and shoes plus socks.
The enclosed-environment REI is zero hours for nonspray methods such as preplant dips, seed treatment, soil drenches, mopping, sponging, soaking and rinsing. For field applications, keep unprotected people out until sprays have dried. During application, allow only protected handlers in the area and prevent direct or drift contact with other people.
Mixing and storing the spray solution
Never bring undiluted concentrate into contact with other pesticides, cleaners or oxidizing agents. Rinse the mixing tank before preparation. Use clean water with low organic and inorganic content, and use the spray solution the same day; do not store it for reuse.
Only nonionic surfactants are compatible with ZeroTol 2.0. Before a proposed tank mix or direct injection, test physical compatibility and crop safety.
Allow 48–72 hours after foliar metal-based products before a ZeroTol foliar spray. Do not mix it with copper or other metal-containing pesticides at a dilution stronger than 1:100. Observe the most restrictive precautions among the mixture’s labels.
Cover the target without stressing the crop
ZeroTol works by contact, so thoroughly wet the intended plant surfaces. Do not foliar-spray during intense heat, drought or poor plant vigor.
Ground-sprayer, drench, fogging and irrigation applications have separate directions. The preharvest interval for the indoor and outdoor crop uses is zero days.
Protect water, pollinators and wildlife
For terrestrial uses, do not apply directly to water or where surface water is present. Keep equipment washwater and rinsate out of water.
ZeroTol is highly toxic to bees and other beneficial insects on blooming crops or weeds. Do not apply it, or let it drift, onto blooming crops or weeds while bees are visiting the treatment area.
Cover or collect treated seed spilled during loading to protect birds and other wildlife.
Keep pesticides in original containers
Keep pesticides in their original containers.
Next step
See how to read a pesticide label and crop fertilizer selection.