Title Image

About Us

Precision Ag Consulting is an agricultural consulting company that specializes in vineyard management, viticulture production consulting, soil fertility and irrigation management on the California Central Coast and San Joaquin Valley. Precision Ag also provides vineyard spraying and vineyard pest control services, as well as soil moisture monitoring sales, service and support. We are the only authorized distributor for Decagon Devices EcH20 soil moisture monitoring equipment in California.  We are a Pest Control Operator licensed to provide vineyard spraying and vineyard pest control services in Paso Robles and on the Central Coast.

Precision Ag is located in Paso Robles, California. The company is directed by plant physiologist and soil-plant-water relations specialist, Lowell J. Zelinski, Ph.D. Dr. Zelinski has a doctorate and soil-plant-water relations from the University of California, Davis and nearly 30 years experience in agricultural consulting and irrigation management and irrigation scheduling. Dr. Zelinski’s wife, Becky Zelinski is co-owner of the company and manages its day-to-day operations, and heads up its sales and marketing efforts. It is their goal to help growers reach their production goals through practical hands-on agricultural consulting practices using both traditional production methods and new cutting-edge precision farming technology.

Mission Statement

Precision Ag Consulting is dedicated to providing top-quality agriculture related products and services. It uses the latest technology and techniques to help growers, agricultural consultants, and farm managers achieve maximum success through improved crop quality and plant growth and development while saving time and money.

Products and Services

Precision Ag Consulting provides a wide range of agricultural consulting, vineyard management, and soil moisture monitoring services, including:

    • Vineyard Management
    • Viticulture production consulting
    • Vineyard spraying services
    • Vineyard pest control monitoring and spraying
    • Irrigation monitoring and irrigation scheduling
    • Soil moisture monitoring services, soil moisture monitoring sales and soil moisture monitoring support

    • Fertility management and fertility recommendations

    •  Soil suitability investigations, soil sampling and soil analysis

    • Plant tissue sampling and plant tissue analysis
    • Petiole sampling, petiole testing analysis
    • Water quality appraisals
    • Precision farming consulting services for most crops

    • Aerial imaging analysis (remote sensing analysis and interpretation)
    • Vineyard vigor analysis
    • Agricultural geographic information systems services
    • GIS mapping services
    • Variable rate applications
    • Agricultural research, education and training

Lowell Zelinski


  • American Society of Enology and Viticulture
  • California Ag Leadership Program, Class XXXIII
  • American Society of Agronomy
  • Crop Science Society of America
  • Certified Crop Advisor
  • Department of Pesticide Regulation Qualified Applicator
  • Department of Pesticide Regulation Pest Control Operator
  • Paso Robles Wine Country Alliance
  • Central Coast Vineyard Team

Dr. Lowell Zelinski has nearly 30 years experience in the agriculture industry in California and abroad. Most of his knowledge comes from working with growers, years of conducting numerous trials and research and working with agricultural related programs throughout the California Central Coast and San Joaquin Valley, as well as the United States.


Present – Owner of Precision Ag, Inc., Paso Robles, California

1999-2003 – Vice President of Production and Operations, California Planting Cotton
Seed Distributors, Bakersfield, Calif.

1995-1999 – Director of Agronomic Services, Delta & Pine Land Company, Scott, Miss.

1987-1995 – San Joaquin Valley agricultural consultant specializing in all aspects of cotton production.

1980-1987 – Soils, water and cotton Farm Advisor for the University of California Cooperative Extension in Fresno County.

Other:  Adjunct professor for the California Polytechnic University, San Luis Obispo, California Polytechnic University, Pomona, California State University, Fresno and California State University, Bakersfield


Ph.D. in Soil Science, University of California, Davis

M.S. in Ag Science, California Polytechnic University, San Luis Obispo

B.S. in Soil and Water Science, University of California, Davis