数据集为东北地区坡耕地主要土种耕作层土壤数据，包含东北地区坡耕地70个土种的土壤理化性质，涉及黑土、黑钙土、白浆土、暗棕壤、棕壤、栗钙土、栗褐土、褐土、粗骨土和风沙土等10个土类。具体项目包括有机质含量、机械组成、pH值和凋萎系数。土壤有机质含量采用重铬酸钾容量法，单位为%。土壤机械组成采用湿筛法和吸管法，单位为%。粒径分级界线包括0.002mm、0.05mm、0.1mm、0.25mm、0.5mm

国家地球系统科学数据中心2022-06-10 更新120

Soil physical and chemical properties based on genetic horizon from 4 replicate pits placed around the replicate LTER control plots sampled in 1988 and 1989.

土壤科学

农业

Dataset contains the following soil properties for each genetic horizon - site, Soil pit, upper and lower boundary (cm), Mg meq/100gm, Ca meq/100gm, K meq/100gm, CEC meq/100gm, pH, %C, %sand, %silt, %

DataONE2016-12-24 更新100

江苏省徐州市丰县-农、林、牧、渔专业及辅助性活动-种植大户清单信息

农业

种植大户

丰县农业农村局-[国标2024]种植大户清单信息

国家公共数据资源登记平台170

Data from: Long-term declines in dietary nutritional quality for North American cattle

农业

气候变化

With over 1 billion cattle in the world as well as over 2 billion sheep, goats and buffalo, these animals contribute approximately 15% of the global human protein supply while producing a significant

DataONE2017-03-24 更新110