Data from: Late-season corn stalk nitrate measurements across the US Midwest from 2006 to 2018
[ NOTE - Data files added 2023-03-07:
- Weather dataset - weather_onfant.csv
- Weather data dictionary - weather_data_dictionary.csv]
This dataset is based on field-guided corn stalk nitrate test surveys across the US Midwest from 2006 to 2018. In total, measurements from 10,675 corn fields were collected which represents 32,025 corn stalk nitrate measurements. Nitrogen form (commonly referred to as N source10) and the total N rate applied, US state, year of harvest, and climatic conditions are included for each site-year (trial location by growing season combination). When available, previous crop, manure source, tillage, and timing of N application are also included.
Resources in this dataset:
Resource Title: Principal dataset.
File Name: stalk_nitrate_CSNT.csv
Resource Software Recommended: Microsoft Excel,url: https://www.microsoft.com/en-us/microsoft-365/excel
Resource Title: Data dictionary .
File Name: data_dictionary.csv
Resource Software Recommended: Microsoft Excel ,url: https://www.microsoft.com/en-us/microsoft-365/excel
Resource Title: Weather dataset.
File Name: weather_onfant.csv
Resource Description: This dataset informs weather variables for the field surveys included in the Principal dataset
Resource Software Recommended: Microsoft Exel,url: https://www.microsoft.com/en-us/microsoft-365/excel
Resource Title: Weather data dictionary.
File Name: weather_data_dictionary.csv
Resource Description: Description of the weather variables and units
Resource Software Recommended: Microsof Excel,url: https://www.microsoft.com/en-us/microsoft-365/excel
Funding
USDA-NIFA: 1023765/2020-67021-32466
History
Data contact name
Miguez, Fernando E.Data contact email
femiguez@iastate.eduPublisher
Ag Data CommonsIntended use
This project generated data that can provide a comprehensive understanding of corn stalk nitrogen (N) status and nitrogen management in several Midwest states. Scientists, farmers and policymakers can gain insights into the impacts of N management and weather variables on corn N status.Use limitations
One of the caveats of the dataset is that crop management information is not consistently informed for all fields. Field management variables have been simplified to be able to combine data from different sources. Also, as yield data were not reported, the relationship between yield and corn stalk nitrate test category or between yield and nitrogen application rate cannot be explored. Out of 10,675 corn fields, 80 had a total N rate higher than 450 kg/ha (400 lb/ac). As most of them had manure as the main N form applied, we suspect that the value informed is too high because of the use of inappropriate manure book values (total N content in % per manure dry matter) rather than manure nutrient analysis.Temporal Extent Start Date
2006-01-01Temporal Extent End Date
2018-12-31Theme
- Not specified
Geographic Coverage
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Our dataset include field survey data collected in Iowa, Illinois, Indiana, Michigan, Ohio and Minnesota.ISO Topic Category
- farming
National Agricultural Library Thesaurus terms
corn stover; nitrogen content; nitrogen fertilizers; nutrient management; plant nitrogen content; cornPending citation
- No
Public Access Level
- Public