Skip to main content

You are here

Fertility Guidelines

General Fertility Guidelines

for Forages (lbs/ac)

Low-Medium Yield Potential Soils 

 

Crop

Nitrogen

 

Phosphorus

(P​2O​5)

Grass Seed 30 - 60 10 - 25
Forage 20 % Legume 40 - 90 10 - 30
Grass-Legume 20-40 % Legume 30 - 65 20 - 30
40-60 % Legume 10 - 30 20 - 40
Legume Greater than 60% Legume 0 - 30 30 - 50

 

Medium-High Yield Potential Soils

 

Crop

Nitrogen

 

Phosphorus

(P​2O​5)

Potassium

(K​2O)

Sulphur

 

Grass Seed 30 - 70 10 - 30 30 - 50 0 - 10
Forage 20 % Legume 60 - 100 10 - 30 50 - 60 10 - 15
Grass-Legume 20-40 % Legume 40 - 90 20 - 40 50 - 70 15 - 30
40-60 % Legume 20 - 40 30 - 40 50 - 80 15 - 30
Legume Greater than 60% Legume 0 - 30 40 - 70 60 - 150

15 - 30

 

High Yield Potential Soils

 

Crop

Nitrogen

 

Phosphorus

(P​2​O​5)

Potassium

(K​2O)

Sulphur

 

Grass Seed 45 - 100 30 - 50 40 - 60 0 - 15
Forage 20 % Legume 60 - 200 30 - 50 40 - 60 0 -15
Grass-Legume 20-40 % Legume 60 - 80 40 - 60 60 - 80 15 - 20
40-60 % Legume 0 - 60 40 -80 80 - 150 15 - 30
Legume Greater than 60% Legume 0- 50 60 -100 80 - 200 20 - 30

*Residual response to the higher rates may persist for two years, particularly when the year of apllication is dry and production is low. Therefore annual application may not always be necessary.

Source: Adapted from various U.S State and Canadian Prairie Province Extension Bulletins.