KingFisher 4020 was selected for its quality and yield (a yield trial leader in Ohio). Its outstanding first year yields, excellent disease package, and its ability to tolerate stresses from wet solid and drought are all factors in its huge success.
- Excellent disease package
- Very high first year yields
- Tolerates stresses from wet soil to drought
- Best for aggressive cutting schedules
KingFisher 4020 is the forage base for many farms today. It is a legume that can fix most of its own nitrogen. Due to the pressures of the rotation schedule on many farms, KingFisher 4020 stands are only in production for three or four years before decreases in productivity are noticed. It is important to get all the yield possible in this short time and these high performing varieties are what we focus on.
KingFisher 4020 can be planted in the spring or late summer, but we recommend late summer whenever possible. Planting depth should be 0.25 to 0.50 inches with good soil contact. If spring sown, a nurse crop of grass or small grain is recommended to maximize the tonnage in the seeding year. We usually recommend seeding grass with alfalfa to give a higher tonnage and better quality feed for the life of the stand. KingFisher 4020 exhibits autotoxicity, which means established plants (older than 6 months) give off compounds that prevent new alfalfa seedlings from establishing.
Once established, KingFisher 4020 stand can last for many years. Many modern varieties can handle 28 day cutting schedules and in fact, some elite varieties need that type of management to perform their best. One very critical aspect of alfalfa management is knowing when to take the last cutting in the fall. By using Growing Degree Days (GDD) you can determine the best time to take the last fall cutting. An early fall cut can be taken as long as the plants can accumulate more than 500 GDD to replenish root reserves. A late fall cutting can be taken as long as no more than 200 GDD will accumulate before killing frost (25°F).
Tags: 4020, Byron Seeds, KingFisher, KingFisher 4020 Byron, Seeds