Co-Owner & Technical Director, Greenway Biotech, Inc.
B.S.M.E., Washington State University | Qualified Applicator License (QAL), California Department of Pesticide Regulation
Amir Tajer is Co-Owner and Technical Director of Greenway Biotech, Inc., a family-owned specialty fertilizer and soil amendment manufacturer in Madera, California, founded in 1989. He provides the technical review behind every published Greenway Biotech growing guide.
Credentials
Amir holds a Bachelor of Science in Mechanical Engineering from Washington State University. At a fertilizer manufacturer, that background gets applied every day: formulation math, solubility and blending behavior, quality control on incoming raw materials, and the label-rate calculations that determine whether a product performs as stated. When a Greenway Biotech article publishes an application rate, it has been checked against the registered product label the same way a production batch sheet is checked.
He also holds a Qualified Applicator License (QAL) issued by the California Department of Pesticide Regulation — a state credential earned by examination and maintained through continuing education, covering pesticide laws and regulations, safe handling, and pest management practice in one of the most heavily regulated agricultural states in the country.
He has led Greenway Biotech since 2012, overseeing product formulation, sourcing, and quality control for the company's water-soluble fertilizers, chelated micronutrients, and soil amendments — the same products discussed in the articles he reviews.
What "Reviewed by" actually means
Every article carrying the "Reviewed by Amir Tajer" credit has passed the same technical checklist before publication.
- Rates come from registered labels. Application rates are verified against the live, registered product label — never estimated, rounded from memory, or copied from third-party sites.
- Sources are university extension or peer-reviewed. Agronomic claims cite university extension programs (UC ANR, UF/IFAS, Oregon State, Penn State, UMass, and similar) or peer-reviewed research — not competitor blogs.
- Nutrient chemistry is stated correctly. Fertilizer analyses use standard label notation (N–P2O5–K2O), nutrient roles are described accurately, and pH, solubility, and compatibility claims must be defensible.
- Claims are qualified. Superlatives, deterrent claims, and "works for everything" language are cut or conditioned. If a recommendation depends on soil pH, climate, or crop stage, the article says so.
Disclosure: Greenway Biotech manufactures and sells products discussed in its articles. Reviews are held to the standards above precisely because of that — a recommendation has to survive the same scrutiny a skeptical agronomist would apply.
Questions
Have a question about a rate, a mixing recommendation, or something in a published guide? Email questions@greenwaybiotech.com or call (562) 351-5168, Monday–Friday, 7 AM–5 PM PST.
Greenway Biotech, Inc.
17861 Road 24, Madera, CA 93638
