TerraEvidence

Optional. Use these fields only when your laboratory reports DTPA-extractable Fe, Mn, Cu and/or Zn.

Optional. Use laboratory-reported texture and organic matter for soil-management context.

Optional. Keep measured CEC/ESP separate from sodium ppm and texture-based typical CEC.

Optional. Keep irrigation-water ECiw, TDS and SAR separate from soil ECe, soil sodium ppm and soil ESP.

Optional. Keep water boron, chloride, bicarbonate and carbonate separate from soil-test values and from automatic treatment calculations.

Optional. Enter sodium exactly as reported by the laboratory. When sodium, calcium, and magnesium are all available on compatible bases, TerraEvidence can calculate SAR transparently. A laboratory-reported SAR remains a separate reported measurement.

Optional. Calcium and magnesium are water measurements. RSC is calculated only when Ca, Mg, bicarbonate and carbonate are all present in compatible meq/L units.

Optional. Water pH and alkalinity are related but distinct measurements. Alkalinity is entered as ppm CaCO₃ equivalent.

Uses the measured irrigation-water calcium and magnesium values already entered above. Hardness is calculated as CaCO₃ equivalent and remains separate from alkalinity.

Optional. Select the chemical form exactly as reported by the laboratory. TerraEvidence will not guess whether a nitrate number is NO₃⁻ or NO₃-N.

Optional. Select the phosphorus form and analytical fraction exactly as reported by the laboratory. TerraEvidence will not guess whether a phosphorus result is orthophosphate-P, orthophosphate as PO₄, total phosphorus, or an unspecified phosphorus fraction.

Optional. Select the potassium basis exactly as reported by the laboratory. Most water laboratories report elemental potassium as K. TerraEvidence will not guess whether an unlabeled potassium number is elemental K or a K₂O-equivalent reporting basis.

Optional. Select the sulfate reporting basis exactly as reported by the laboratory. TerraEvidence will not guess whether an unlabeled sulfate result means sulfate ion (SO₄²⁻) or sulfate-S reported as elemental sulfur.

Optional. Enter chloride exactly as reported by the laboratory in mg/L as Cl⁻. TerraEvidence will not treat chloride as free chlorine, a chlorination dose, or total salinity.

Optional. Enter boron exactly as reported by the laboratory in mg/L as B. TerraEvidence will not assign a generic crop-safe, deficient, or toxic classification from concentration alone.

Optional. Select the laboratory reporting basis exactly as reported. TerraEvidence will not silently treat total iron and dissolved iron as interchangeable.

Optional. Select the laboratory reporting basis exactly as reported. TerraEvidence will not silently treat total manganese and dissolved manganese as interchangeable.

Optional. Select the laboratory reporting basis exactly as reported. TerraEvidence will not silently treat total zinc and dissolved zinc as interchangeable.

Optional. Select the laboratory reporting basis exactly as reported. TerraEvidence will not silently treat total molybdenum and dissolved molybdenum as interchangeable.

Optional. Select the laboratory reporting basis exactly as reported. TerraEvidence will not silently treat total selenium, dissolved selenium, selenate, and selenite as interchangeable.

Optional. Select the laboratory reporting basis exactly as reported. TerraEvidence will not silently treat total arsenic, dissolved arsenic, arsenite, and arsenate as interchangeable.

Optional. Select the laboratory reporting basis exactly as reported. TerraEvidence preserves total versus dissolved cadmium and does not turn concentration alone into a crop, food-safety, loading, or treatment decision.

Optional. Select the laboratory reporting basis exactly as reported. TerraEvidence preserves total versus dissolved lead and does not turn irrigation concentration alone into a soil, crop, food-safety, exposure, loading, or treatment decision.

Optional. Select the laboratory reporting basis exactly as reported. TerraEvidence preserves total, dissolved, Cr(III), and Cr(VI) identity and does not convert irrigation concentration alone into crop, soil, health, ecological, or treatment conclusions.

Optional. Select the laboratory reporting basis exactly as reported. TerraEvidence preserves total versus dissolved nickel and keeps essential-plant-nutrient interpretation separate from toxicity, loading, food-chain, ecological, and treatment decisions.

Optional. Select the laboratory reporting basis exactly as reported. TerraEvidence preserves total versus dissolved cobalt and keeps microbial/nitrogen-fixation biology separate from automatic fertilizer, toxicity, food-chain, loading, ecological, and treatment decisions.

Optional. Enter the laboratory-reported fluoride concentration as mg/L F. TerraEvidence keeps irrigation agronomy separate from crop safety, livestock, drinking-water, ecological, loading, and treatment conclusions.

Optional. Preserve the laboratory reporting basis and choose whether citrus is the crop context. TerraEvidence keeps citrus sensitivity separate from the general long-term irrigation value.

Optional. Select the laboratory reporting basis exactly as reported. TerraEvidence preserves total versus dissolved vanadium and keeps detection separate from plant-nutrient, toxicity, loading, ecological, and treatment conclusions.

Optional. Select the laboratory reporting basis exactly as reported. TerraEvidence preserves total versus dissolved beryllium and keeps crop sensitivity, soil fixation, long-term accumulation, human-health, and treatment questions separate.

Optional. Select the laboratory reporting basis exactly as reported. TerraEvidence preserves total versus dissolved aluminum and keeps soil-pH chemistry, crop injury, liming, loading, ecological, and treatment questions separate.

Optional. Select the laboratory reporting basis exactly as reported. TerraEvidence preserves total versus dissolved copper and keeps essential-nutrient status separate from toxicity, source, loading, ecological, and treatment decisions.