Fertilization Calculator

• Fertilizer Calculator: Find Out How Much Fertilizer to Use in Your Vegetable Garden
• Calculations Used to Determine the Amount of Fertilizer Needed to Treat Turf
• Gardening by the Numbers: How to Calculate How Much Soil Your Raised Bed Needs
• Fertilizing Flower Garden Plants
• Calculating Recommended Fertilizer Rates For Vegetables Grown In Raised-Bed, Mulched Cultural Systems
• Fertilizer Calculator - The closest I've seen to what I'm looking for.
• Fertilizing the Vegetable Garden - application rates based on soil analysis.
• Quick guide to fertilizing plants
• Recommendations For Liming And Fertilizing Vegetables - from Clemson Univ.
• Fertilizing Vegetable Gardens - good summary of fertility math
• Fertilizers for Vegetables in Home Gardens - more in-depth info or fertility requirements of different crops and timing of fertilization. Local copy
• Vegetable Fertilizer Guide - Crop specific recommendations Locally saved copy
• Crop-specific nutrient needs
• California Crop Fertilization Guidelines - from UC Davis. Very detailed.
• Fertilizer Recommendations by Crops, Categorized - Most detailed information per crop. Locally saved copy

Components of Calculation

• Requirements of crop fertilization:
  • General requirements of the crop
  • The area (sq ft, row-feet, plant?) to be planted.
  • Soil test results - recommendation of application rate to achieve fertility needed.
• Database of soil amendments
  • NPK analysis
  • Calculation of volume/weight per analysis
  • Cost per unit fertilization
  • Translation into appropriate field measurement (cups, pounds, buckets, etc)
• Application to determine fertility plan
  • Combines multiple amendments
  • Set application unit (volume or weight) & amount
  • Calculates resulting fertility added.
  • Calculates cost.