Field experimental data of crop yields, nutrient concentrations, and harvest indices from around the world

Estimates of cropland nutrient budgets and nutrient use efficiencies at national to global scales have generally relied on average nutrient concentrations for quantifying nutrients removed in crops and by-products. Calculation of crop nutrient removal requires estimates of the yield of crop products (e.g. grain or beans) and crop residues (e.g. straw or stover) and the nutrient concentration of these components. Data for yields of crop products are often readily available, but those of crop residues are not. The harvest index can be used to estimate the quantity of crop residue from available data on crop product yields. Nutrients removed in harvested crops are the major source of nutrient losses. The availability of more locally relevant crop coefficients can improve the granularity of estimates for nutrient budgets and use efficiencies.  To aid this, field experimental data were collated for major crops from August 2020 to improve estimates of crop harvest index and nutrient concentra..., Data acquisition
Data were collated from published articles or theses found in scientific literature following the method described by Ludemann et al. (2022). Terms used in Ovid (https://ovidsp.ovid.com/), CAB Abstracts (https://www.cabdirect.org/) and Google Scholar (https://scholar.google.com/) were as follows: (nitrogen OR phosphorus OR potassium OR sulphur OR sulfur) AND (\"triticum aestivum\" OR wheat OR maize OR \"Zea mays\" OR corn OR soybean OR \"Glycine max\" OR rice OR \"oryza sativa\") AND (\"nutrient concentration\" OR \"nutrient content\").  In September 2020 this search led to over 18,000 articles. The list of articles was manually filtered to include crop product and/or crop residue nutrient concentration and/or harvest index data of relevance to maize, rice, soybeans and wheat.  Thereafter, citation alerts were continually tracked, with data from any new articles added to the combined dataset. It is envisioned that this database will be updated with data from new articles over time...., , This README file was generated on 2024-08-13 by Cameron Ludemann

**GENERAL INFORMATION**

Summary_statistics_data_from_articles.csv
This datafile combines summary statistics data from a range of articles found in the scientific literature related to crop harvest index and nutrient concentrations of crop products (e.g. beans and grain) and crop residues (straw and stover).
Missing data are given the letters NA.

Meta_data_Summary_statistics_data_from_articles.csv
This data file explains what data are in each column in the Summary_statistics_data_from_articles.csv file.

1. Author Information
A. Principal Investigator Contact Information
Name: Cameron Ludemann
Institution: Wageningen University and Research
Address: Plant Production Systems, Wageningen, The Netherlands.
Email: [[e-mail]](mailto:[e-mail])/[e-mail]

B. Associate or Co-investigator Contact Information
Name: Achim Dobermann
Institution: International Fert...