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This article in SSSAJ

  1. Vol. 22 No. 2, p. 170-173
    Received: July 23, 1957



Preliminary Observations of Perennial Lupine as a Cover Crop in Field-Planting Sites and Forest Nurseries in Wisconsin1

  1. 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.

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