Urth Agriculture
SOM protocol · Pro Grow System

Pro Calcium

Soil structure & oxygenation

Calcium carbonate from pure calcite, ultra-micronized and water soluble, to fix structure, save water and raise yields. Ounces per acre, not pounds per acre.

Ultra-micronizedWater solubleFree of heavy metals
Pro Calcium product label
Why growers use it

Relax the soil, and water and roots go where they’re needed.

Pro Calcium optimizes soil structure and health for water savings, better oxygenation and higher yields.

01Reduces soil compaction through flocculation

In high-clay soils, calcium displaces sodium and magnesium, which disperse soil particles and pack them tight. Calcium makes clay particles clump into larger aggregates, improving structure, porosity, water infiltration and root penetration. It’s a non-leaching mineral that stays in the soil.

02Improves soil structure and tilth

Calcium promotes aggregation, improves infiltration and aeration, and stabilizes organic matter. The soil becomes easier to work, with better seedbeds and root growth.

03Strengthens cell walls and immunity

Calcium builds the pectin that holds cell walls together. Strong walls mean better immunity. It also helps balance electrical conductivity and reduce pathogenic nematode pressure.

04Activates plant enzymes

Calcium acts as a cofactor and signaling molecule, switching on enzymes involved in growth, development and stress response. It improves uptake and transport of other nutrients and helps plants tolerate drought, salinity and temperature swings.

05Maintains pH

Calcium carbonate helps neutralize acidic soils, raising and stabilizing pH for crop growth.

06Feeds plants and encourages root development

Calcium stimulates root hair growth and structure, improves nutrient uptake efficiency, promotes proper fruit formation and reduces disorders like blossom end rot in tomatoes and peppers. It also helps the soil hold and release nutrients.

07Builds plant-available calcium in the soil

Regular applications raise the calcium the crop can draw on.

08Stimulates soil microbes

Calcium improves microbial function; more strains are present and at higher counts.

09Improves excess sodium, magnesium, potassium and sulfates

Calcium displaces sodium from the soil’s exchange sites, improving structure and water movement, and keeps magnesium and potassium in balance so plants can reach the nutrients they need.

10Reduces salinity and erosion

Calcium helps remediate salt from irrigation water, decrease erosion and weeds, and fix dead spots in fields.

11Easy to apply

Apply through drip, flood, sprinkler or other irrigation. Do not apply undiluted. Irrigation rate: 50 grams per acre, per application, twice a month. For compacted soil, contact us about a custom compaction protocol.

Ultra-fine Pro Calcium powder
The finest calcium on the market

Source and grinding methods matter.

Pro Calcium is calcium carbonate from pure calcite, free of heavy metals and magnesium, delivering both calcium and carbonate directly into the plant.

Unlike other calcium and gypsum products that can clog lines, Pro Calcium is ultra-micronized and water soluble, so it passes easily through any irrigation system and is taken up through the plant’s stoma or roots.

Just 50 grams per acre, per application, is all the SOM protocol needs, which makes Pro Calcium both highly effective and cost effective.

Pistachios ripening on the tree
Compaction protocol

Pistachios, avocados, artichokes or any crop with compaction issues.

As part of the SOM protocol or the compaction protocol, Pro Calcium relaxes the ground so water and nutrients get down where they’re needed most.

Documentation

Labels, safety data and certifications.

Put Pro Calcium to work on your farm.

Tell us about your crop, acreage and irrigation and we’ll build a program around it.

The rest of the Pro Grow System

A family of products that perform.

Each product does one job well. Together they feed soil life, structure the ground and protect the crop.

SOM protocol

  • Pro MicrobesBiological fertilizer

    A powerful biological fertilizer for living soil.

    • Build soil organic matter
    • Maximize microbial activity
    • Balance soil pH
    Learn more about Pro Microbes
  • Pro GuardNutrient-dense crop food

    A diverse nutrient and food source for the crop.

    • Diverse nutrient and food source
    • Faster, stronger root development
    • Stronger immune response
    Learn more about Pro Guard
  • Pro EnergyMicrobial food & electrolyte

    Organic food and electrolyte for macro and microbial life.

    • Energizes soil life
    • Balances soil, stimulates growth
    • Improves tilth and structure
    Learn more about Pro Energy
  • Pro EnzymeMicrobial stimulation

    Enzymes that stimulate soil microbial life.

    • Accelerates beneficial microbes
    • Reduces plant stress
    • Less run-off, inhibits root rot
    Learn more about Pro Enzyme
  • Organic SugarCarbohydrate source

    Long- and short-chain carbohydrates to fuel microbes.

    • Microbe fuel
    • Superior organic cane sugar
    • Used in SOM and compaction protocols
    Learn more about Organic Sugar

Foliar protocol

  • Pro Guard FoliarPest-resistance plant food

    Feeds the plant while it deters predatory pests.

    • Protects against pests
    • Mimics high °Brix
    • Immediate nutrient uptake
    Learn more about Pro Guard Foliar

Additional products

  • Pro MineralsTrace minerals & amino acids

    Essential trace minerals that move nutrients into the plant.

    • Transporter and chelating agent
    • Faster, stronger roots
    • Improved drought tolerance
    Learn more about Pro Minerals
  • Pro HumicHumic & fulvic acids

    A soil life conditioner and natural detoxifier.

    • Natural detoxifier
    • More nutrient and water uptake
    • Improved tilth and structure
    Learn more about Pro Humic
Topsoil 0–12 in

Increase yields, maximize quality and save money.

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