Calculating Fertilizer Rates From Nutrient Recommendations

Home » How To Calculate Fertilizer Blends » Calculating Fertilizer Rates From Nutrient Recommendations

Maybe your like

Header Side Menu Content Footer Search Printer FriendlyFrançaisSite Map Contact Government Government of Manitoba Keywords
  • Resident and online services
    • Search Programs and Services
    • Forms
    • Publications
    • Finding Work
    • Lost Identification
    • Moving to or Around Manitoba
    • Communities around Manitoba
    • Maps
    • Online Services
    • Social Media Directory
    • Mobile Applications
  • Business
    • Search for Business Information
    • Starting a Business
    • Business Research
    • Financing a Business
    • Registration, Legal and Licencing
    • Doing Business with Government
    • Entrepreneurship Manitoba
    • BizPaS
    • BizPaL
  • Government
    • Premier
    • Cabinet Ministers
    • Departments
    • Agencies, Boards and Commissions
    • Proactive Disclosure
    • Legislative Assembly
    • Manitoba Courts
    • Manitoba Laws
  • Visitors
    • Things to do
    • Places to Go
    • Where to Stay
    • Events
    • Trip Essentials
    • Visitor Information Center
Agriculture
  • manitoba.ca
  • > Agriculture
  • > Crops
  • > Soil Fertility
  • > Soil Fertility Guide
  • > Calculating Fertilizer Rates from Nutrient Recommendations
Page ContentSoil Fertility Guide

Calculating Fertilizer Rates from Nutrient Recommendations

 

Soil test recommendations are given in lb/ac or kg/ha of nutrients. To determine the fertilizer rate for a particular nutrient, multiply the rate of the desired nutrient by 100 and divide by the percentage of the nutrient in the fertilizer.

Example 1

  • Recommended rate of N is 80 lb/ac Using 46-0-0, the rate of fertilizer required is:  (80 x 100) / 46 = 174 lb/ac

Example 2

  • Recommended rate of P 2O 5 is 40 lb/ac Using 11-52-0, the rate of fertilizer required is:  (40 x 100) / 52 = 77 lb/ac 77 lb/ac of 11-52-0 would also supply (11/100) x 77 = 8.5 lb/ac of N.

Example 3

  • Recommended rate of K 2O is 15 lb/ac. Using 0-0-60, the rate of fertilizer required is:  (15 x 100) / 60 = 25 lb/ac
 

Converting Fertilizer Prices into Price per unit of Nutrient

The cost of a fertilizer is related to its plant nutrient content. If a nitrogen fertilizer such as 34-0-0 is being purchased, the cost should be about three-quarters that of 46-0-0. When buying fertilizer, one should compare prices on the basis of cost per pound of "actual" nutrient, not the price per tonne of fertilizer material.

Example 1

If urea (46-0-0) costs $367/tonne, the cost per pound of nitrogen (N) is calculated as follows:

  • Nitrogen in one tonne (1,000 kg or 2,204 lb) of 46-0-0 (containing 46% N):  (46/100) x 2,204 = 1,014 lb Cost per lb of N is:  $367/1,014 = $0.362

Example 2

(Based on 11-52-0 at $391/tonne)  In order to calculate the cost of phosphate in 11-52-0, the value of nitrogen must first be subtracted.

  • Nitrogen in one tonne (1,000 kg or 2,204 lb) of 11-52-0 is (11/100) x 2,204 = 242 lbs The value of nitrogen is 242 x $0.362 = $88 (from example 1, which calculated the value of N to be $0.362/lb) Cost of phosphate per tonne is $391 - $88 = $303 Phosphate in one tonne (1,000 kg or 2,204 lb) of 11-52-0 is: (52/100) x 2,204 = 1,146 lb Cost per lb. of P 2O 5 is :  $303/1,146 = $0.264

For further information, contact your MAFRD GO Representative.

Get Started
  • Homepage
  • About
  • Animal Health and Welfare
    • About the CVO
    • Animal Welfare
      • Animal Protection
      • Animal Welfare Dashboards
      • Education
      • Legislation and Codes of Practice
      • Education
      • Legislation and Codes of Practice
    • Animal Health
      • Biosecurity
      • Equine Biosecurity
      • Disease Control & Surveillance
      • Disease Investigations Dashboards
      • Veterinary Drugs
    • Emergency Preparedness
    • One Health
      • Rabies Dashboards
    • Traceability
      • Premises Identification
      • Animal Identification
      • Movement
      • Food Processing
    • Veterinary Diagnostic Services
      • Laboratory Manuals
      • Submission Forms
      • VDS Dashboards
  • Crops
    • Crop Management
    • Biosecurity
    • Soil Fertility
    • Insects
    • Plant Diseases
    • Weeds
    • Seasonal Reports
      • Crop Report
      • Crop Pest Update
      • Fruit Crop Report
      • Potato Report
      • Vegetable Crop Report
    • Crop Residue Burning Program
      • Frequently Asked Questions
      • Burning of Crop Residue and Non-Crop Herbage Regulation
      • Enforcement
      • Smoke Dispersion: the Key to it All
      • The Costs of Stubble Burning
      • Farmer Alternatives for Managing Straw
      • Why Do Farmers Burn?
      • Impact of the Manitoba Crop Residue Burning Program
      • History of the Program
    • Crop Diagnostic Services
      • Crop Diagnostic School
      • Horticulture School
    • Guides and Publications
    • Apiary
      • Home Page
  • Environment
    • Climate Change
      • Agriculture and Climate Change
      • Mitigation
      • Adaptation
    • Ecological Goods and Services
      • Activities in Manitoba
      • Working Groups
      • Estimating Program Uptake and the Nature of Costs-Benefits in Agro-Manitoba
    • Environmental Farm Plan
    • Mortality Management
      • Burial
      • Composting Mortalities
      • Incineration
      • Rendering
    • Nutrient Management
      • Manure Management
    • Soil Management
      • Manitoba Fall Soil Moisture Survey
    • Water Management
      • Watershed Evaluation of BMPs
      • Integrated Watershed Management Planning
    • Guides and Publications
    • Events and Deadlines
  • Farm Management
    • Cost of Production
      • Fertilizer Cost
      • Business Risk Management
      • Marketing Management
      • Non-Current Guides
    • Farm Machinery
    • Farmland and Buildings
      • Sample Agreements
    • Financial Management
      • Human Resources
    • Farm Succession and Transition
      • Ownership Structure
      • Young Farmers
    • Presentations and Videos
    • Manitoba Family Farm Recognition Program
  • Food and Ag Processing
    • About the Sector
    • Starting a Food Business
      • Business Pathways
      • Food Development Centre
      • Resources
    • Market Development
      • Value Chains
    • Provincial Abattoirs
  • Food Safety
    • On-Farm
      • Programs
    • Education and Resources
    • Inspection
      • Food Processing Inspection
      • Meat Inspection
      • Risk-Based Inspection
  • Funding
    • Sustainable Canadian Agricultural Partnership
    • Business Risk Management
    • AgriInvest
    • AgriStability
    • AgriRecovery
    • Canadian Agricultural Partnership (2018-2023)
    • Veterinary Student Grants
  • Industry Leadership
    • Leading an Organization
    • Starting an Organization
    • Developing a Strategic Plan
      • Strategic Planning
      • Mission Statement
      • Vision Statement
      • Goal Development
      • Evaluation
    • Board Operations
      • Risk Management
      • Effective Meetings
      • Communication
      • Employee Management
      • Storing Documents
    • Being a Board Member
      • Board Member Recruitment
      • Roles and Responsibilities
    • Dissolving an Organization
    • Resources
    • 4-H
    • Rural Organizations
    • Workforce
      • Employers
      • Job Seekers
      • Industry Careers
  • Land Management
    • Private Land
    • Crown Land
      • Leasing Program
      • Appeal Tribunal
    • Foreign Ownership
    • Land Map Viewers
  • Livestock
    • Aquaculture
    • Beef
    • Bison
    • Dairy
    • Goat
    • Pork
    • Poultry
    • Sheep
    • Other
      • Auctions and Selling
      • Brand Design
      • Brand Registry
      • Dealer and Agent License
  • Local Food
  • Markets and Statistics
    • Crops Statistics
    • Livestock Statistics
    • Food and Value Added Agriculture Statistics
    • Economic Analysis
    • Financial Statistics
    • Trade Statistics
    • Agriculture Census
    • Publications and Proceedings
  • Permits and Licences
    • Pesticide and Manure Licensing Program
      • Pesticide Applicator Licence
      • Pesticide Dealer License
      • Manure Applicator Licence
      • Renewing a Licence
      • Frequently Asked Questions
      • Legislation
  • Protein
    • Invest in Manitoba
    • Protein Sources
    • Sustainability
      • Sustainable Protein Initiatives
      • Industry Sustainability Drivers
      • Funding Sustainable Transitions
    • Protein Innovation
      • Food Development Centre
      • The Canadian Centre for Agri-Food Research in Health and Medicine
      • Richardson Centre for Food Technology and Research
      • University of Manitoba
      • Brandon University
      • University of Winnipeg
      • Red River College
      • ACC
      • Cereals Canada
      • EMILI
    • Reports, Videos and Podcasts
    • Manitoba Protein Advantage Strategy
  • Research and Innovation
  • Online Resources
    • Manitoba Hay Listing Service
    • Reports and Newsletters Signup
    • Sign Up for Growing Manitoba Ag
    • AgTalk Webcasts and Videos
    • Crop Talk
  • Contact
  • Reports and Expenses
    • Annual Reports
    • Supplement to the Estimates of Expenditure
  • Weather
    • Manitoba Ag Weather Program
    • Manitoba Weather Network Existing Stations
    • Weather Conditions and Reports
Stay Connected
  • Join us on Facebook
  • Follow us on Twitter
  • Subscribe to our RSS
  • View our videos on YouTube
  • View our photos on Flickr
  • Accessibility
  • Disclaimer
  • Copyright
  • Privacy
  • Twitter
  • Facebook
  • YouTube
  • Flickr
Government of Manitoba No

Tag » How To Calculate Fertilizer Blends