Resource Gradient Experiment at the Kellogg Biological Station, Hickory Corners, MI (1999 to 2019)

This study provides a gradient of 9 different rates of nitrogen fertilization under rainfed and irrigated conditions. Irrigation began in 2003. Corn was grown from 2000-2005 and subsequently the crop rotation (wheat, corn, soybean) followed the crop of the LTER main site. Nitrogen applications differ by crop after 2007. The experiment was moved to its current location on the LTER main site in 2005. The experiment location/history are explained here. Plots are 5×30 m arranged in each of 4 replicate blocks . Crop yields, nitrous oxide and soil temperature, moisture and nitrogen data are available for this study.
original data source http://lter.kbs.msu.edu/datasets/36 Resources in this dataset:Resource Title: Website Pointer to html file. File Name: Web Page, url: https://portal.edirepository.org/nis/mapbrowse?scope=knb-lter-kbs&identifier=33 Webpage with information and links to data files for download

本研究提供了在雨养和灌溉条件下，9种不同氮肥施用率的梯度。灌溉始于2003年。玉米种植于2000年至2005年期间，随后按照LTER主站点的作物轮作（小麦、玉米、大豆）的模式进行。自2007年起，氮肥施用方式随作物种类而异。实验于2005年被迁移至LTER主站点的当前位置。实验地点及历史背景在此处进行解释。每个重复区块中均设有5×30米的试验地块。本研究提供了作物产量、氧化亚氮以及土壤温度、水分和氮含量数据。