Strong changes in soil nutrient stocks in northern forests over four decades

The file "R code 40yearsnutrients" contains all R code to reproduce the figures and tables of the study "Strong changes in soil nutrient stocks in northern forests over four decades" based on the three csv files "H30", "H30Min", and "GCallcomp".文件“R code 40yearsnutrients”收录了所有可复现研究《北方森林四十年来土壤养分储量的显著变化》（英文原标题：Strong changes in soil nutrient stocks in northern forests over four decades）中全部图表与表格的R代码，该复现流程依托“H30”、“H30Min”与“GCallcomp”三个逗号分隔值（Comma-Separated Values，CSV）文件完成。