AmeriFlux ecosystem observation datasets - University of Nebraska, Lincoln, Agricultural Research Service irrigated continuous maize site

The study site is one of three fields (all located within 1.6 km of each other) at the University of Nebraska Agricultural Research and Development Center near Mead, Nebraska. This site is irrigated with a center pivot system. Prior to the initiation of the study, the irrigated site had a 10-yr history of maize-soybean rotation under no-till. A tillage operation (disking) was done just prior to the 2001 planting to homogenize the top 0.1 m of soil, incorporate P and K fertilizers, as well as previously accumulated surface residues. Since the tillage operation, the site has been under no-till management until the harvest of 2005. Following harvest, a conservation-plow tillage operation was initiated where a small amount of N fertilizer is sprayed on the residue immediately prior to the plow operation. Approximately 1/3 of the crop residue is left on the surface. The post-harvest conservation-plow operation continues as the current practice. Resources in this dataset:Resource Title: GeoData catalog record. File Name: Web Page, url: https://geodata.nal.usda.gov/geonetwork/srv/eng/catalog.search#/metadata/UniversityOfNebraska1_eaa_2015_March_17_1330

该研究场所位于内布拉斯加州米德市内布拉斯加大学农业研究与开发中心的三个田地之一（三者相距均在1.6公里以内）。该区域采用中心灌溉系统进行灌溉。在研究启动之前，该灌溉田地已有长达十年的非耕作玉米-大豆轮作历史。在2001年种植前，进行了耕作操作（旋耕），以均质化土壤表层0.1米，并混入磷钾肥以及之前累积的地表残留物。自耕作操作以来，该区域一直采用非耕作管理直至2005年的收获。收获后，启动了保护性耕作旋耕操作，在旋耕前对残留物喷洒少量氮肥。约三分之一的作物残留物留在地表。收获后的保护性耕作旋耕操作已成为当前的标准操作。本数据集中包含的资源：资源标题：GeoData目录记录。文件名：网页，URL：https://geodata.nal.usda.gov/geonetwork/srv/eng/catalog.search#/metadata/UniversityOfNebraska1_eaa_2015_March_17_1330