Most fertilizer materials are highly soluble salts, which dissociate in the soil solution following application. Almost every spring there are reports of fertilizer burn somewhere in Wisconsin. Seedling injury caused by fertilizer burn can result in minimal to extensive stand loss and can be extremely costly in high value vegetable crops. I have been asked recently to review several problem fields where liquid fertilizer was placed in-furrow with the seed both with and without Y-splitters or was dribbled above the row on the soil surface. Stands were significantly reduced in each field. It is important to understand salt index and factors which contribute to fertilizer burn in order to avoid fertilizer injury to seedlings.