Home | Instructions to Authors |SASE| Editorial Board | Articles | Subscriptions | Conference | Conference Program

 

Abstract

 

 

Wilson, M.L., J.F. Moncrief, and C.J. Rosen. 2008. Kidney bean (Phaseolus vulgaris L.) production on an irrigated, coarse-textured soil in response to polymer coated urea and tillage: I. Grain yields, disease severity, and a simple economic analysis. JEMREST 5:41-56.

 

 

Kidney beans (Phaseolus vulgaris L.) in Minnesota are commonly grown on irrigated, coarse-textured soils that are susceptible to nitrate leaching. A dense Bt layer that is present in these soils restricts root growth and may increase severity of Fusarium root rot. Anecdotal evidence from local growers suggests that breaking up the Bt layer reduces the impact of root rot. This study was conducted to assess different tillage depths and the use of polymer coated urea (PCU, Agrium U.S. Inc. and WSPCU, Specialty Fertilizer Products) on grain yields, net monetary returns and disease severity. The study was conducted over three years as a split plot design. Whole plots were deep and shallow tillage (chisel plowed to an average of 47 and 29 cm, respectively) while N treatments were subplots. Three rates of PCU applied at emergence were compared with equivalent rates of urea split applied at emergence and prebloom. Also, one rate of each source, including WSPCU, was applied at planting and a 0 N control was included. Differences between tillage depths were not found. Disease severity was not significantly affected by tillage depths or N treatment. Emergence applied PCU resulted in lower grain yields and monetary returns than split urea applications. PCU applied at planting, however, resulted in similar yields and monetary returns compared with split and planting urea, which suggests a more optimal N regime for kidney bean production. Planting applied WSPCU also resulted in similar yields and net returns as planting applied urea.

 

Copyright © 2002-2009