Preliminary Observations of Perennial Lupine as a Cover Crop in Field-Planting Sites and Forest Nurseries in Wisconsin1
- J. H. Stoeckeler2
Plantings of perennial lupine (Lupinus perennis) were observed over a 4-year period on 12 field-planting sites in northeastern Wisconsin and in 2 forest nurseries.
On nonirrigated field plantings production varied considerably by sites. On sites of reasonably good nutrient content and moisture relations oven-dry weight of the crop per acre was in the range of 3,136 to 3,762 pounds per acre in the fourth year, with a nitrogen equivalent of 60 to 73 pounds per acre. On dry or very infertile sites the species was a failure, producing only a few hundred pounds of bulk dry matter per acre.
In irrigated nurseries it produced an average of 3,203, 4,792, and 12,180 pounds per acre of oven-dry material in the first, second, and third years, respectively. Average nitrogen content on a per-acre basis ranged from 55 pounds the first year to 311 in the third year. Seed production in a second-year nursery planting was 480 pounds per acre and in a third-year stand, 812 pounds per acre.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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