CropMaster
Preferred Source is dedicated to helping growers and agricultural organizations adopt proven, science-based alternatives to conventional fertilization practices. Our goal is to equip farmers with the tools and knowledge needed to reduce dependence on chemical inputs while maintaining—or even improving—yield and crop quality. By addressing soil imbalances and toxicities, we help build biologically active, ecologically sustainable soils that support long-term productivity and environmental health.
Micronutrient Innovation
CropMaster micronutrients are formulated using a natural, sugar-based chelation process instead of conventional chemical (EDTA) chelates. This advanced approach allows plants to absorb nutrients more efficiently while benefiting from natural carbohydrate energy—without the residue or buildup associated with synthetic chelates.
Each formulation contains essential trace elements, including iron, zinc, manganese, boron, copper, molybdenum, and cobalt, fortified with amino acids, organic acids, natural sugars, enzymes, and alpha ketos to maximize nutrient availability and plant response. These products are 100% water soluble and highly effective for both foliar and soil applications, helping correct or prevent deficiencies and improve plant vigor throughout the growing season.
Liquid NPK
Liquid Biological N-P-K Formulation
Multi-Purpose | Liquid Plant Nutrients
Preferred Source offers a line of liquid NPK formulations designed to deliver balanced nutrition through foliar application or drip irrigation. Each formulation supports a different stage of crop growth, providing targeted nutrition for optimal plant performance. These biologically based products offer a superior edge over conventional fertilizers by improving nutrient uptake, promoting vigorous growth, and supporting overall plant health.
Liquid Micronutrients
In agronomy, micronutrients—also known as trace elements or minor nutrients—are essential plant nutrients required in small amounts. While macronutrients such as nitrogen (N), phosphorus (P), and potassium (K) are needed in larger quantities, micronutrients play a vital role in plant health, growth, and productivity. Elements like iron, manganese, zinc, boron, molybdenum, copper, and cobalt support critical plant processes such as enzyme function, chlorophyll production, and nutrient balance within the soil and plant system.
Secondary Micronutrients
Secondary nutrients are required in greater quantities than micronutrients but in smaller amounts than primary macronutrients such as nitrogen, phosphorus, and potassium. Though often overlooked, they play a vital role in cell and root development and are essential throughout all stages of plant growth. These nutrients—typically including calcium, magnesium, and sulfur—form their own category of products, known as Secondary Nutrients, which are critical to balanced, sustainable crop nutrition.
Humic
Introducing CropMaster® Super Hume®, a concentrated organic carbon from Leonardite, rich in humic and fulvic acids Our unique extraction process delivers pure, active formula, certified organic by the WSDA. It enhances nutrient uptake and promotes root development for better soil health. Available through Preferred Source as part of your fertility program.