Subject	Agricultural and Biological Sciences (General)
Specific subject area	Agricultural diversification, leveraging on the potential of neglected and underutilised crops.
Type of data	Table, chart
How data were acquired	Datasets are a compilation of secondary information that are collected from various sources including books, research articles, databases, website articles, experts and local communities growing underutilised crops, etc.
Data format	Tabulated and linked data (secondary data), analysed
Parameters for data collection	The focused parameters include agro-ecological requirements and crop season length, potential yield and nutritional composition (both macro- and micro-) and market data of crops at species and limited sub-species level. The compiled data definition can be accessed at the following link: https://doi.org/10.5281/zenodo.3988137
Description of data collection	The primary way to conduct literature review from several sources that could potentially contain the data for needed parameters, following a Standard Operating Procedure. Data was then extracted and stored in a structured format using an online data manager that was developed in-house.
Data source location	Institution: Crops for the Future UK (CIC) City/Town/Region: Chelmsford, Essex Country: England, UK The list of primary data sources is extensive* and the sources are mainly databases, research articles, website articles etc. However, large portion of the data were collected from: Crop Ecological Requirements Database (ECOCROP) [1] FoodData Central [2] *Information about all primary data sources are compiled in a “Metadata table” of the database and can be accessed here: https://cropbase.co.uk/cropbasev5/metadata.php
Data accessibility	Repository name: Global Knowledge Base for Underutilised Crops Direct URL to data portal: https://cropbase.co.uk/cropbasev5/ Link to database code and data used to make figures in this article: https://github.com/CFFRC-KST/CFFRC-Global-Knowledge-Base link to DOI of data: https://doi.org/10.5281/zenodo.3735694
Related research article	Mohd Nizar, N. M., Jahanshiri, E., Tharmandram, A. S., Salama, A., Mohd Sinin, S. S., Abdullah, N. J., Zolkepli, H., Wimalasiri, E. M., Mohd Suhairi, T. A. S. T., Hussin, H., Gregory, P. J., & Azam-Ali, S. N. (2021). Underutilised crops database for supporting agricultural diversification. Computers and Electronics in Agriculture, 180, 105920. https://doi.org/10.1016/j.compag.2020.105920