Coulee Experimental Forest nursery stock measurements, 1961-1962

Nursery stock measurement data were recorded in May 1961 for 190 trees to be used in a spring 1961 planting on the Coulee Experimental Forest in La Crosse County, Wisconsin. These data were collected for each tree species and age class over the course of a few days. Data collected included: length of top and root, diameter of stem at ground level, top and root green weight, and top and root weight after oven drying. Comparable data were collected in May 1962 on 150 nursery stock trees to be used in a 1962 planting on the Coulee Experimental Forest.
In spring 1961, trees were planted in 6 different plots to facilitate studies on: the survival of various species and age classes of conifers; reduction of transpiration through the use of retardants or shading; snow accumulation and disappearance; interception, depth, duration, and type of soil freezing; runoff and erosion; water quality on different slopes, aspects, and topographic positions; litter accumulation; and physical and chemical changes in soils and changes in infiltration rates.

In spring 1962, trees were planted in 4 additional plots to facilitate studies on: ground preparation and survival for red pine on steep, abandoned farmland; the survival of various species and age classes of conifers; reduction of transpiration through the use of retardants; and survival of various tree species and direct seeding on favorable conditions.
Original metadata date was 09/27/2018. Minor metadates updates were made on 02/20/2019, which included additional information being added to the data set credit section. Additional minor metadata updates were made on 11/13/2019.

1961年5月，针对威斯康星州（Wisconsin）拉克罗斯县（La Crosse County）库利实验林（Coulee Experimental Forest）1961年春季造林所用的190株苗木，研究人员完成了测量数据采集，该项工作在数日内完成，涵盖各树种与龄级（age class）的相关指标。本次采集的测量指标包括：地上部分与根系长度、地面处茎干直径、地上部分与根系鲜重，以及经烘箱烘干后的地上部分与根系干重。1962年5月，研究人员同样针对该实验林1962年春季造林所用的150株苗木，采集了可比的测量数据。

1961年春季，研究人员将苗木种植于6个不同样地，以开展以下研究：针叶树（conifers）不同树种与龄级的存活率；通过使用蒸腾抑制剂（retardants）或遮阴措施降低林木蒸腾量；积雪积累与消融过程；土壤冻结的截留量、冻结深度、持续时长与冻融类型；径流与侵蚀状况；不同坡度、坡向及地形位置下的水质情况；枯落物积累特征；以及土壤理化性质变化与土壤入渗速率（infiltration rates）变化。

1962年春季，研究人员新增4个样地开展苗木种植，以开展以下研究：陡坡弃耕农田上红松（red pine）的整地措施与造林存活率；针叶树不同树种与龄级的存活率；通过使用蒸腾抑制剂降低林木蒸腾量；以及不同树种的造林存活率，与适宜立地条件下的直播造林（direct seeding）效果。

该数据集的原始元数据创建日期为2018年9月27日；2019年2月20日进行了小幅元数据更新，包括在数据集credits部分补充相关信息；2019年11月13日又进行了额外的小幅元数据更新。