Skip to main content
Calcimator

Keyline Design Calculator

Plan keyline plow patterns for water redistribution across your landscape, estimating line spacing, costs, and water distribution improvements.

Inputs

%

Results

Number of rip lines

264

Total ripping distance (miles)66
Estimated time (hours)30
Total cost ($)$1,452.00
Cost per acre ($)$36.30
Water redistribution gain (%)32
Channel storage capacity (gal)506,913
Additional effective water (gal/acre/yr)260,678
Total Additional Gallons10,427,136
Cost Per Acre$13.80
How to Use This Calculator
  1. Enter Field size (acres), Average slope (%), and Line spacing (ft).
  2. Set Ripping depth (inches), Fuel cost ($/gallon), and Annual rainfall (inches).
  3. Review the Number of rip lines result.
  4. Use Total ripping distance (miles) and Estimated time (hours) to inform your decision.

How the result changes with Line spacing (ft)

Line spacing (ft)Number of rip lines
3.3400
6.55201
10132
1494

What each input means

Field size (acres)
Acreage to be keyline-plowed.
Average slope (%)
Average field slope. Keyline works best on 2-15% slopes.
Line spacing (ft)
Distance between rip lines. 3-5 ft for intensive, 5-10 ft for extensive management.
Ripping depth (inches)
Depth of subsoil ripping. Yeomans plow: 12-18 inches typical.
Fuel cost ($/gallon)
Diesel fuel cost per gallon for tractor operation.
Annual rainfall (inches)
Average annual precipitation for your area.

What each result means

Number of rip lines
Total keyline rip lines across the field.
Total ripping distance (miles)
Total linear distance to be ripped.
Estimated time (hours)
Tractor hours to complete the keyline pattern.
Total cost ($)
Fuel plus operator labor cost.
Cost per acre ($)
All-in cost per acre for keyline ripping.
Water redistribution gain (%)
Estimated increase in effective rainfall utilization from keyline water redistribution.
Channel storage capacity (gal)
Total water volume the rip channels can hold during rainfall events.
Additional effective water (gal/acre/yr)
Estimated additional effective water per acre per year from redistribution.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Field size (acres) = 40, Average slope (%) = 5, Line spacing (ft) = 5, Ripping depth (inches) = 14 = 6 input(s) provided
  2. Calculate Number of rip lines
    Number of rip lines = floor(fieldSideFt / lineSpacingFt)
    264 = 264
  3. Calculate Total ripping distance
    Total ripping distance = totalLinearFt / 5280
    66 = 66
  4. Calculate Estimated time
    Estimated time = totalLinearMiles / speedMph
    30 = 30

Related Calculators

The questions that sit next to this one — chosen by subject, including calculators filed under a different category.

Regenerative Ag

Water Infiltration Calculator

Estimate water infiltration improvements from regenerative practices like cover cropping, no-till, and organic matter building.

Regenerative Ag

Agroforestry Calculator

Design alley cropping layouts with tree row spacing, croppable area calculations, carbon sequestration estimates, and windbreak benefits.

Regenerative Ag

Biochar Application Rate Calculator

Calculate biochar application rates, carbon sequestration potential, costs, and soil improvement effects for your field.

More in Agriculture & Farming.