Data and code: Grain-legume nitrogen replacement for maize in sub-Saharan Africa: an evidence assessment

Data and code for an evidence assessment of yield-equivalent fertiliser nitrogen replacement values of grain legumes for the following maize crop in sub-Saharan Africa. The deposit contains the extraction tables (117 experiment groupings, 176 core comparisons with their comparator N responses and target yields, 167 fixed-N yield contrasts, appraisal judgements and same-target sensitivity analyses), the study-selection flow, title-and-abstract decisions for 22,624 unique records (bibliographic details and codes, without abstracts), the search strings for every source, and Python scripts that regenerate the counts, tables and figures reported in the article. Source documents and licensed database exports are not included. See README.md.