Dry Fertilizers

Dry fertilizers built for specific soil constraints.

Dry inputs are selected for placement and soil chemistry, not just analysis. They are used where mineral dominance and pH drive tie-up, restricted mobility, or inefficient nutrient interaction.

Sul4r-Plus® 16-20-0-13

Overview

Dry fertility with defined placement purpose.

Dry products are used where placement, longevity, and soil chemistry dictate nutrient behavior. In Soil Mender programs, these inputs are selected to address specific constraints—salt loading, calcium dominance, pH-driven tie-up, or the need for moderated mineral availability across the season.

Sul4r-Plus®

Controlled-release calcium sulfate with low salt impact.

Sul4r-Plus is a granular calcium sulfate fertilizer formulated for moderated mineral release and reduced salt loading. It supplies calcium and sulfate in a controlled-release form intended for season-long mineral presence rather than rapid dissolution.

Calcium & Sulfate Delivery

21% calcium and 17% sulfur (as sulfate) in controlled-release form.
Gradual dissolution maintains mineral availability across the growing season.
Used where calcium and sulfur are required without increasing nitrogen inputs.

Low Salt Impact

Salt index more than 17× lower than ammonium sulfate or ammonium thiosulfate.
Selected where salinity management and sodium displacement are program priorities.
Does not contribute to short-term osmotic spikes associated with highly soluble sulfate sources.

Soil Structure & Mineral Interaction

Calcium contributes to aggregation and cation balance in soil systems.
Sulfate sulfur remains plant-available upon dissolution.
Includes 8% fulvic acid to assist mineral interaction within the soil solution.

Placement & Program Fit

Granular formulation blends with base dry fertility.
Used in broadcast, pre-plant, or banded applications.
Selected where calcium supply is needed without increasing salt load or nitrogen pressure.

Why Sul4r-Plus fits Soil Mender programs

Sul4r-Plus functions as a moderated calcium and sulfur input within programs focused on managing salinity, sodium influence, and calcium availability. Its low salt index and controlled-release behavior align with systems prioritizing soil chemistry stability over short-term nutrient surges.

Request pricing / availability View 16-20-0-13

16-20-0-13 Ammonium Phosphate Sulfate

Balanced N-P-S with localized acidity at placement.

16-20-0-13 is a granular ammonium phosphate sulfate fertilizer supplying nitrogen, phosphorus, and sulfur in a single prill. The manufacturing process produces a low-pH granule, creating localized acidity as it dissolves in soil. This localized pH shift influences phosphorus behavior in high-pH and calcareous systems, where calcium dominance often drives tie-up.

N-P-S Supply

16% nitrogen, 20% phosphorus, 13% sulfur (as sulfate).
Provides foundational N-P-S nutrition in a single dry application.
Sulfate sulfur remains immediately plant-available.

Localized Acidity & Phosphorus Behavior

Low-pH prill creates a temporary acidic micro-zone at dissolution.
Moderates calcium–phosphorus antagonism in high-pH soils.
Reduces early fixation pressure at the point of placement.

Antagonism Management

Selected in systems where calcium dominance restricts phosphorus mobility.
Used to improve nutrient efficiency by addressing soil chemistry at the prill interface.
Limits the need to compensate with higher phosphorus rates.

Placement & Program Fit

Used in broadcast or banded applications.
Banded placement concentrates localized acidity and is often preferred in calcareous systems.
Integrated where pH and calcium levels influence phosphorus behavior.

Why it fits Soil Mender programs

While 16-20-0-13 is a standard fertilizer analysis, its localized acidity makes it structurally different at placement. In systems where pH and calcium dominance limit phosphorus availability, this prill chemistry helps manage antagonism rather than compensating through increased rate.

Request pricing / availability Back to Sul4r-Plus®