The measured and simulated data for corn and soybean yields, tileflow, N concentration, and N loading by plot, year, treatment, rotation, tillage and N application from 36 1-acre plots located on the Northeast Research and Demonstration Farm near Nashua, Iowa are presented. The measured data were analyzed with the Root Zone Water Quality Model (RZWQM) Version 1.0.2000.830 and summarized in 8 papers in a special issue of Geoderma (Volume 140, No. 3, pages 217-322). The economic returns associated with each plot year were budgeted using the EconDocs software, since improved and released as DevTreks. Resources in this dataset:Resource Title: Nashua Data Access . File Name: Web Page, url: https://apps.tucson.ars.ag.gov/nashua/ Web site for the Nashua Project, including links to :

graphical presentation of the measured data climate data official soil series information about the Clyde, Floyd, Kenyon, and Readlyn soils interactive Access database of the measured and simulated results spreadsheet detailing all of the operations used on the research plots graphical summary of the simulated vs measured results for corn and soybean yields, tileflow, N concentration, and N loading by plot, year, treatment, rotation, tillage and N application method listing of the RZWQM input files for each plot in each year information on the RZWQM model and its applications spreadsheet detailing all of the costs and returns DevTreks software bibliography of water quality papers based on the Nashua site