General Seed Placed (Pop Up) Fertilizer Application Guidelines

Corn and Grain Sorghum:

  1. Do not place urea, UAN (28-0-0), ammonium thiosulfate (ATS, 12-0-0-26S) or boron in direct contact with the seed.
  2. N + K2O in contact with the seed should be limited to 10 lbs/acre for 30 inch rows.
  3. Reduce seed placed fertilizer by 50% when soil conditions are dry or sandy.
  4. 5 gallons/acre of 10-34-0 with the seed has shown to be safe.

Soybean:

  1. If seeding in 6 to 7 inch rows, limit seed placed N + K2O to 5 lbs/acre.
  2. Do not place urea, UAN, ATS or boron in direct contact with the seed.
  3. If seeding in 15 to 30 inch rows, do not apply fertilizer in contact with seed.

Small Grains: (6-7 inch drill rows)

  1. N + K2O should not exceed 25-30 lbs/acre when placed in direct contact with the seed when row spacing is 6 or 7 inches.
  2. Do not place ATS or boron in direct contact with the seed.
  3. If seeding in 6 or 7 inch rows, urea in contact with the seed should be limited to 15 lbs/acre, 10 lbs/acre if dry or sandy soils.
  4. Apply anhydrous ammonia at least 2-3 inches to the side and below the seed. Seed injury will occur if anhydrous ammonia comes in contact with the seed.
  5. Reduce seed placed fertilizer by 50% when soil conditions are dry or sandy.

Dry Edible Beans and Potatoes:

  1. Do not apply any fertilizer in contact with the seed.

Sugar Beets:

  1. 3-4 gallons/acre of 10-34-0 with the seed. This rate has been shown to be safe when planting in 22 inch rows.

Flax, Canola, Mustard, Safflower, and Buckwheat:

  1. N + K2O in contact with the seed should be limited to 10 lbs/acre when planting in 6 inch or 7 inch rows. Limit N + K2O to 5 lbs/acre if soil conditions are dry or sandy.
  2. Do not place DAP, urea, UAN, ATS or boron in direct contact with the seed.
  3. Limit P2O5 applications to 20 lbs/ac.

General Comments:

  1. Dry or sandy soil conditions increase the risk of crop injury (poor germination and emergence) from seed placed fertilizers; therefore, it is suggested to reduce the fertilizer rate by 50%.
  2. Monoammonium phosphate (MAP, 11-52-0) has shown to be safer to use when placed with the seed than DAP (18-46-0).
  3. If the row spacing of your seeding equipment is not listed, contact you local agronomist for safe application rates.
  4. These fertilizer guidelines are compiled from various University and Extension research publications from the Upper Great Plains of the US and Canada.