Soil Health & Mineral Nutrition


Promoting healthy nutrition for your pecan orchard can seem taxing at times. However, when your trees are receiving optimal nutrition the quality and yield of you're crop are most satisfying. There are many different types of minerals, macro-  and micro-nutrients that are beneficial to your pecan trees development. If you believe your orchard is deficient in these minerals there are ways to diagnosing nutrient disorders in pecan trees. Thanks to agricultural science, we now know that determining the correct dosage relies on many factors. The condition of your soil, soil type (structure & texture), analyzing the soil, using the correct form and type of chemicals for your soil can help you answer these questions. Another tool that will assist in maximizing your pecan orchards nutritional needs can be done by conducting leaf analysis seasonally. This will determine if your current fertilization and mineral nutrition treatments are effective or need to be modified.



Pecan Tree Crowding

Pecan Orchard Fertilization

Pecan Orchard Fertilization Southwest

Fertilizer and Cultural Recommendations for Pecan Trees

Diagnosing Nutrient Disorders in Pecan Trees


Manganese Deficiency in Pecan

Optimal Manganese Nutrition Increases Photosynthesis of Immature Pecan Trees

Nitrogen and Zinc


Correction of Zinc Deficiency in Pecan

Soil-application of Zinc-EDTA Increases Leaf Photosynthesis of Immature ‘Wichita’ Pecan Trees

Zinc Nutrition of Pecans Growing in Alkaline Soil

Leaf Levels of Zinc Required for Maximum Nut Yield and Vegetative Growth in Pecan


How To Add Zinc To Pecan Trees

Pecan Leaf Elemental Sufficiency Ranges and Fertilizer Recommendations





University of Arizona

James Walworth

Extension Specialist and Professor of Soil Science

University of Arizona


Joshua Sherman

Horticulturist / Tree & Vine Physiology

Area Agent, University of Arizona


Soil Health


Pecan trees in their native habitat are found close to rivers and as such they only like alluvial river soils, with good drainage conditions. However, these nut trees are only limited by the soil in which they are grown. Pecan trees have had to adapt to various soil conditions. The soil in the current pecan growing regions are limited primarily by their parent material to which they are derived and the elements that are available to promote their growth.

Before considering a new site for an orchard, one should consider having their soil tested to ensure proper orchard development and to identify any potential problems like poor drainage, salt toxicity issues, fungal or bacterial diseases, and / or problematic pest issues. Knowing about your soil type and condition can help you to determine the types of chemicals, the quantity of chemicals needed, and what chemicals are better suited for your soil type. Another benefit to soil analysis is that you can better determine how much water your orchard will need.


List of Recommended Labs

Salinity Management and Soil Amendments for Southwestern Pecan Orchards

Soil Fertility and Soil testing guideline for Arizona Cotton

Using gypsum and other calcium amendments in southwestern soils


Soil-Pecan Relationships

Pecan Budget - Costs per acre to Produce Pecans without Weed Seeker

Not all soils are created equal.

Visualizing Soil Properties: Dispersion and Flocculation

Soil and Soil Dynamics

Soil Basics: Soil Profiles

Water Movement in Soil

Minerals in soil and pond water

How Soil Tests are Analyzed

How to Collect a Soil Sample for Lab Analysis

Saline and Sodic oils - the difference

Soil Infiltration: Soil porosity testing

Unavailability of Water in Saline Soils

What is the Sodium Adsorption Ratio (SAR)?

National Soil Survey Handbook (NSSH)

Soil Survey of Arizona PDFs USDA

Soil Survey by State PDFs USDA

Problem Soils

Recommended Labs

Soil Sampling and Analysis

University of Arizona

James Walworth

Extension Specialist and Professor of Soil Science

University of Arizona


Leaf Analysis


Leaf analysis can tell you a lot about your orchards nutritional deprivation or overall condition and can also give you a better idea on what your orchard needs in the next oncoming growing season. Leaf analysis can help you to determine if your trees have a nutrient disorder, and help you to determine the effectiveness of your fertilizer program. If you feel you need help with providing your orchard with proper nutrition, feel free to contact your local University of Arizona Cooperative Extension Agent or Specialist, or Certified Crop Consultant.


Leaf Sampling Guide with Interpretation and Evaluation for Arizona Pecan Orchards

How To determine if pecan trees have enough nutrients

How to take a pecan leaf test / pecan leaf sampling

Water management in pecan orchards

Leaf sampling guide with interpretation for Arizona pecan orchards


Arizona Pecan Growers Association Inc.

P.O. Box 7

Sahuarita, AZ 85629

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