Plant aboveground biomass data: The Effect of Nitrogen Addition and Different pH Levels on Microorganism Populations

The purpose of this experiment was to measure the effect of NH4NO3 addition and different levels of pH on microorganism populations. The experiment was located in field B. This experiment was laid out as a full factorial design with 3 nitrogen levels and 4 pH levels. The pH levels strived for are 4.0, 5.5, 6.5, and controls. The nitrogen levels are E, G, and I are defined in fertilization details. The experiment had 4 replicates. The treatments were randomly assigned to the 48 plots. The plots were 4 by 4 meters and were laid out in a 6 by 8 grid.

On May 5, 1995, a wildfire burned all of the plots in experiment 24 in field B.

本试验旨在探究硝酸铵（NH₄NO₃）施加量与不同pH水平对微生物种群的影响。试验场地为B地块。本试验采用全因子试验设计，设置3个氮素水平与4个pH水平。目标调控的pH水平分别为4.0、5.5、6.5以及对照组。氮素水平E、G、I的具体定义详见施肥详情说明。本试验共设置4次生物学重复，各处理组被随机分配至48个样地中。每个样地规格为4米×4米，以6行8列的网格布局排布。
1995年5月5日，一场野火焚毁了B地块内编号为24的试验的全部样地。