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Agronomic Crops Network

Ohio State University Extension

CFAES

Production of Other Small Grain Species

Fertilizer recommendations for the other small grain species are provided in Tables 6-12 through 6-14. Insect control recommendations can be found in Extension Bulletin 545, Insect Pests of Field Crops

Table 6-12: Recommended Nitrogen for Small Grains (Pounds Nitrogen Per Acre). 

 

Crop 

Yield Goal (bu/ac)

  Barley  65 90 115
  Oats  90 120 150
Spring Application  (Spelt)  40**  75**  110** 
Spring Application  (Barley)  55**  95**  135** 
Spring Application  (Oats)  60**  90**  125** 
Spring Application  (Rye)  60**  90**  60** 

*Use short, stiff-strawed varieties.
**Reduce nitrogen rate by 40 pounds per acre on dark colored soils. 

Table 6-13: Examples of Phosphorus (Expressed as lb P2O5/ac) Recommended for Small Grains. 

 

Crop 

Yield Goal (bu/ac)

  Barley, Spelt  50 70 90
  Oats  100 130 160
  Rye  30 45 60
Soil Test Value  Annual Recommendation       (lb P2O5/ac) 
lb P/ac  ppm       
30 15 80 95 115
40 20 55 70 90
50-80  25-40  30 45 65
90 45 15 25 35
100 50 0 0 0

Table 6-14: Examples of Potassium (Expressed as lb K2O/ac) Recommended for Small Grains. 

Crop 

Yield Goal (bu/ac)

Barley, Spelt  50 70 90
Oats  100 130 160
Rye  30 45 60
    CEC CEC CEC

Soil Test Value 

10 20 30 10 20 30 10 20 30

lb K/ac

ppm

Annual Recommendation (lb K2O/ac)

50 25 150 190 230 160 195 240 165 255 300
150 75 75 140 225 85 145 235 90 155 240
250 125 40 65 100 45 65 110 50 55 115
350 175 0 0 40 0 0 20 0 0 0
450 225 0 0 20 0 0 0 0 0 0

Weed Control for Small Grains 

Specific chemical weed control recommendations can
be found in the Weed Control Guide, Extension Bulletin 789, available at all County Extension offices and online at CFAES publications at: estore.osu-extension.org/.