Nashua Data Access: An agricultural water quality study in Nashua, Iowa

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