Chemists & Consultants

Sampling GuideSampling Guide
Sampling Techniques for Soil and Plant Tissue

Analytical Catalog
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In the field, there is no substitute for experience. Fortunately, experience is one of the great strengths of the Dellavalle approach. Our consultants are spread throughout California for easy access. Due to the wide diversity of California agriculture, their expertise includes tree crops, field and row crops and vineyards as well as landscaping. In addition all have worked with water compliance issues as dictated by the Department of Health Services and the California Regional Water Quality Control Board.

Nat B. Dellavalle
Nat B. Dellavalle - 55 Years Experience
Certified Professional Agronomist/SoilScientist, Certified Crop Advisor
Mobile: (559) 647-5316
Area: Outside California, Foreign countries, Southern California
Email Nat


Hugh A. Rathbun
Hugh A. Rathbun - 44 Years Experience
Certified Professional Soil Scientist, Certified Crop Advisor
Mobile: (559) 994-8060
Area: Fresno, Merced and Stanislaus Regions
Email Hugh


Keith M. BackmanKeith M. Backman - 44 Years Experience
Certified Horticulturist/PomologistCertified , Crop Advisor
California Water Distribution Operator

Mobile: (559) 647-5330
Area: Eastern Fresno, Kings, Northern Tulare, San Luis Obispo and Santa Barbara Regions
Email Keith


Ben Nydam
Ben Nydam - 25 Years Experience

Consultant, Irrigation Specialist, Certified Crop Advisor
Mobile: (559) 647-5331
Area: Kern, Tulare, Kings Regions
Email Ben


Danyal Kasapligil
Danyal Kasapligil - 26 Years Experience

Certified Professional Agronomist, Certified Crop Advisor, Agricultural Pest Control Advisor
Mobile: (831) 750-4509
Area: Napa, Sacramento, Salinas, Special Projects
Email Danyal


Bill Blanken
Bill Blanken - 58 Years Experience

Mobile: (559) 469-2832
Area: Kern, Kings and Tulare Regions
Email Bill


Anne Collins Burkholder
Anne Collins Burkholder - 8 Years Experience
Certified Crop Advisor
Mobile: (530) 400-1346
Area: Lodi, Modesto, North Sacramento, Special Projects
Email Anne


Lacey Mount
Lacey Mount - 5 Years Experience

Agronomist, Certified Crop Advisor, Doctor of Plant Medicine
Mobile: (559) 351-2741
Area: Fresno, Madera and Merced regions, Special Projects
Email Lacey


Cynthia Tiemersma
Cynthia Tiemersma - 3 Year Experience

Dairy Technician
Mobile: (559) 471-6140
Area: Kern, Kings, Fresno Regions
Email Cynthia


Sam Daud
Sam Daud - 1 Year Experience

Mobile: (559) 940-1294
Area: Fresno and Madera Regions
Email Sam