Micronutrient Calculator

Zinc, boron, and manganese rates from soil test and crop.

Micronutrient

Soil test result (ppm)

Soil pH

Field size (acres)

Product analysis (%)

Product price ($/lb)

Tab to move between fields

Product rate (lbs/acre)

6.9

Actual nutrient (lbs/acre)

2.5

Soil test deficit (ppm)0.5

Currently sufficient? (1=yes)0

Sufficiency level (%)50%

Sufficiency threshold (ppm)1

pH adjustment factor1

Cost per acre ($)$3.47

Total product (lbs)139

Total cost ($)$69.44

How to Use This Calculator

Select the Micronutrient: Zinc, Boron, Manganese, Iron, or Copper.
Enter your Soil Test Result (ppm) — DTPA extraction is standard for most micronutrients.
Set Soil pH — higher pH reduces availability of zinc, manganese, iron, and copper.
Enter Field Size (acres) and Product Analysis (%) or leave at 0 to use typical product defaults.
Review Product Rate (lbs/acre), Actual Nutrient (lbs/acre), Sufficiency Level (%), and whether the field is Currently Sufficient.

What each input means

Micronutrient: 1 = Zinc, 2 = Boron, 3 = Manganese, 4 = Iron, 5 = Copper.
Soil test result (ppm): DTPA-extractable soil test value in parts per million.
Soil pH: Soil pH affects micronutrient availability. Higher pH reduces Zn, Mn, Fe, Cu availability.
Field size (acres): Total acres to treat.
Product analysis (%): Micronutrient content of product (0 = use typical product).
Product price ($/lb): Cost per pound of micronutrient product.

Product rate (lbs/acre): Recommended pounds of product per acre.
Actual nutrient (lbs/acre): Pounds of actual micronutrient delivered per acre.
Soil test deficit (ppm): How far below the sufficiency threshold.
Currently sufficient? (1=yes): Whether soil levels are already adequate.
Sufficiency level (%): Current level as a percentage of the sufficiency threshold.
Sufficiency threshold (ppm): Target soil test level for adequate nutrition.
pH adjustment factor: Rate multiplier based on soil pH (1.0 = no adjustment).
Cost per acre ($): Micronutrient application cost per acre.
Total product (lbs): Total pounds of product for the entire field.
Total cost ($): Total micronutrient cost for the entire field.

Identify Input Parameters
4 parameters
Micronutrient = 1, Soil test result (ppm) = 0.5, Soil pH = 6.5, Field size (acres) = 20 = 6 input(s) provided
Calculate Product rate
Product rate = min(lbsProductPerAcre, micro.maxRate)
6.9 = 6.9
Calculate Actual nutrient
Actual nutrient = lbsProductPerAcreFinal * (analysis / 100)
2.5 = 2.5
Calculate Soil test deficit
Soil test deficit
0.5 = 0.5
Calculate Currently sufficient?
Currently sufficient?
0 = 0