Crop Diversity Score Calculator

Evaluate farm biodiversity using the Simpson Diversity Index, crop count, rotation length, and legume proportion for organic rotation planning.

Inputs

Total Farm Acres

Crop 1 Acres (largest)

Crop 2 Acres

Crop 3 Acres

Crop 4 Acres

Crop 5 Acres

Crop 6 Acres

Total Legume Acres

Rotation Length (years)

Tab to move between fields

Results

Diversity Score (0-100)

79.9

Distribution Evenness

0.91

Simpson Diversity Index0.78

Number of Crops6

Legume Proportion (%)25%

Unallocated Acres0

How to Use This Calculator

Enter the number of crop species and families planned in the rotation.
Enter field count, rotation length (years), and cover crop inclusion.
Read crop diversity score and biodiversity index for the rotation system.
Higher diversity scores correlate with better soil health, pest suppression, and weed control.
Use results to demonstrate diversity to organic certifiers and soil health program requirements.

What each input means

Total Farm Acres: Total cropland acreage on the farm.
Crop 1 Acres (largest): Acreage of your largest crop.
Crop 2 Acres: Acreage of your second crop.
Crop 3 Acres: Acreage of your third crop.
Crop 4 Acres: Acreage of your fourth crop.
Crop 5 Acres: Acreage of your fifth crop (0 if not applicable).
Crop 6 Acres: Acreage of your sixth crop (0 if not applicable).
Total Legume Acres: Combined acres of legume crops (clover, beans, peas, alfalfa).
Rotation Length (years): Number of years in your crop rotation cycle.

What each result means

Diversity Score (0-100): Composite biodiversity score based on diversity, crop count, rotation, and legume proportion.
Simpson Diversity Index: Statistical diversity measure (0 = monoculture, approaching 1 = highly diverse).
Number of Crops: Count of distinct crops with non-zero acreage.
Legume Proportion (%): Percentage of cropland in nitrogen-fixing legumes (target: 25-30%+).
Distribution Evenness: How evenly acreage is distributed across crops (0-1, higher = more even).
Unallocated Acres: Farm acres not assigned to any crop (fallow, habitat, buildings).

How this is calculated

Worked example, using the default values

Identify Input Parameters
4 parameters
Total Farm Acres = 200, Crop 1 Acres (largest) = 60, Crop 2 Acres = 50, Crop 3 Acres = 40 = 9 input(s) provided
Calculate Diversity Score
Diversity Score = (
79.9 = 79.9
Calculate Distribution Evenness
Distribution Evenness = numberOfCrops > 1
0.91 = 0.91
Calculate Simpson Diversity Index
0.784 = 0.784
Calculate Number of Crops
6 = 6

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