The high mining potential of the Peruvian Andes has promoted booming foreign investments. The mining activity takes place on campesino community lands and headwaters. Once the government awards a mining concession, mining companies must regularly negotiate land rent with communities over the whole duration of the mining operation, often leading to disagreements. Our research objective is to identify the mining impacts on the farming activities of campesino communities in the Junin region, central Peruvian Andes. Using a mixed-methods approach involving in-depth interviews, water and soil analysis, land-cover classification and participatory mapping, we analyzed the mining-community agreements and the mining impacts on the farming lands. We arrived at two primary conclusions. First, mining activities in terms of heavy metal concentrations impact on farming lands, although the contribution of previous and concurrent activities cannot be distinguished. Second, the diverging and short-termed interests of the involved parties which circumscribe the agreements may potentially lead to conflicts.Minerals 2019, 9, 647 2 of 28 own the land [17,19]. Based on the canon minero, 50% of the taxes from the mining sector is distributed among the affected subnational governments (i.e., district and province) [20][21][22][23]. The subnational governments directly affected by mining may receive up to 70% of this tax [11,18,24], while campesino communities are excluded from receiving it directly. As a result, the communities tend to negotiate compensations separately with the mining companies. Both canon minero and compensations are aimed at reducing land-use conflicts. Despite this, conflicts increased (2005)(2006)(2007)(2008)(2009)(2010)(2011), reduced in 2012 and have remained constant (ca. 162 yearly conflicts) since then [19,[25][26][27][28][29][30][31][32][33][34][35][36][37]. In 2017, Peru allocated 16 million ha for mining concessions [38], although not all of these became viable mines. The most common mining practice in Peru is open-pit mining, as this model is preferred for exploiting metal deposits. There are 36 open-pit mines throughout the country [39]. The environmental impacts of open-pit mining mainly relate to water infiltration and supply to rivers [12,[40][41][42], which impact the socio-economic situation of local households [1,[43][44][45].Most studies have split these biophysical and socio-economic aspects rather than integrating them [43][44][45][46]. Therefore, an interdisciplinary approach [47] is suggested to broaden the understanding of the impacts of mining from different perspectives. In this sense, the overarching objective of this study is to identify the mining impacts on the farming activities of campesino communities in the Junin region. Therefore, we first analyzed the agreements between mining companies and communities via in-depth interviews with stakeholders. Then, we evaluated the influence by open-pit mining sites on the water and soil quality and assessed the effects on farming lands. The foll...