This data package accompanies the manuscript "First-Mile Ecosystem Architecture and De-Risking Agricultural Finance in Zambia" (Muzala Shinka), submitted to Agrekon. It supports the district-level empirical analysis of maize production risk reported in Sections 2.7 and 4.6, which decomposes yield variance into landscape/structural, seasonal and idiosyncratic components and calibrates a first-loss capital trigger for the proposed Zambia Agriculture Risk Fund (ZARF).