PO 34. Describe advantages and limitations of the following fertilizer placement methods.

Seed placement is also known as pop-up application.  A small amount of fertilizer is placed with corn seeds during planting, sometimes in conjunction with banding.  Both liquid and dry can be used.

• Advantages: lower equipment costs, starter effect greater than just meeting nutrient requirements

• Disadvantages: can be phytotoxic if too much fertilizer is applied; retro-fitting planters can be expensive.  Urea and DAP cannot be used, and to prevent salt burn the total rate must be kept below 10 lbs of N + K₂O.