Soil organic carbon and nutrient dynamics in response to anaerobic digestate application to farm fields, Eastern Iowa, 2011-2023

This dataset documents a long-term, field-scale study of anaerobic digestate application on commercial croplands in eastern Iowa, USA. It includes detailed records of digestate composition, application rates, and timing, as well as soil test results collected over a 12-year period (2011–2023) from 14 agricultural fields. The dataset supports analysis of soil organic carbon (SOC), nutrient dynamics, and isotopic composition in response to digestate inputs. It contains 421 georeferenced soil samples, digestate nutrient profiles, field management histories, and spatial boundaries. The data were collected as part of a collaborative effort between researchers at Iowa State University and Sievers Family Farms to evaluate the agronomic and environmental implications of integrating anaerobic digestion into row crop and livestock systems.

本数据集记录了美国爱荷华州东部商用农田施用厌氧消化沼渣（anaerobic digestate）的长期田间尺度研究。数据集包含沼渣组分、施用量、施用时间的详细记录，以及2011至2023年这12年间从14个农田采集的土壤检测结果。本数据集可支撑针对沼渣输入后土壤有机碳（soil organic carbon, SOC）、养分动态及同位素组成响应变化的分析。数据集包含421个带地理坐标的土壤样品、沼渣养分特征谱、农田管理历史记录以及空间边界数据。本数据集由爱荷华州立大学研究人员与西弗斯家庭农场（Sievers Family Farms）合作采集，旨在评估将厌氧消化技术整合入行播作物与畜牧系统后产生的农艺与环境影响。