HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Ruiz Diaz, D. A. Articles by Sawyer, J. E. Search for Related Content PubMed Articles by Ruiz Diaz, D. A. Articles by Sawyer, J. E. Agricola Articles by Ruiz Diaz, D. A. Articles by Sawyer, J. E. Related Collections Soybean Other Crop Management Soil Fertility and Productivity

CROP ECOLOGY, MANAGEMENT & QUALITY-NOTES

Soybean Response to Inoculation and Nitrogen Application Following Long-Term Grass Pasture

^a Dep. of Agronomy, Kansas State Univ., Manhattan, KS 66506-5501
^b Dep. of Agronomy, Iowa State Univ., Ames, IA 50011-1010

^* Corresponding author (ruizdiaz{at}ksu.edu).

Current demand for soybean grain [Glycine max (L.) Merrill] may lead to a conversion of pasture and Conservation Reserve Program fields into soybean or corn (Zea mays L.) production. Our objective was to determine the effect of soybean seed inoculation with Bradyrhizobium spp. and fertilizer N application rate on soybean productivity planted 1 and 2 yr after conversion to row crop production. Soybean followed the pasture the first year and followed an intervening corn crop the second year. Treatments consisted of a factorial arrangement of seed inoculation and fertilizer N rate. Application of rhizobia inoculum significantly increased soybean grain yield by an average of 130 kg ha^–1. Plant dry matter (DM), N concentration, N accumulation, and grain N were also increased with soybean seed inoculation; however, seed quality was not affected. Fertilizer N application increased plant DM but did not increase grain yield, with or without inoculation. Furthermore, N fertilizer did not increase plant N or improve seed quality. Results from this study indicate that growers should inoculate soybean seed when planted after long-term grass pasture. Application of N fertilizer is not suggested even if no rhizobia seed inoculation is used because fertilizer N did not improve grain yield.

Abbreviations: DM, dry matter