The Bronson Files, Dataset 6, Field 13, 2014

Dr. Kevin Bronson provides a unique nitrogen and water management in cotton agricultural research dataset for compute, including notation of field events and operations, an intermediate analysis mega-table of correlated and calculated parameters, and laboratory analysis results generated during the experimentation, plus high-resolution plot level intermediate data analysis tables of SAS process output, as well as the complete raw data sensor recorded logger outputs.
This data was collected using a Hamby rig as a high-throughput proximal plant phenotyping platform.
The Hamby 6000 rig
Ellis W. Chenault, & Allen F. Wiese. (1989). Construction of a High-Clearance Plot Sprayer. Weed Technology, 3(4), 659–662. http://www.jstor.org/stable/3987560
Dr. Bronson modified an old high-clearance Hamby 6000 rig, adding a tank and pump with a rear boom, to perform precision liquid N applications. A Raven control unit with GPS supplied variable rate delivery options.
The 12 volt Holland Scientific GeoScoutX data recorder and associated CropCircle ACS-470 sensors with GPS signal, was easy to mount and run on the vehicle as an attached rugged data acquisition module, and allowed the measuring of plants using custom proximal active optical reflectance sensing. The HS data logger was positioned near the operator, and sensors were positioned in front of the rig, on forward protruding armature attached to a hydraulic front boom assembly, facing downward in nadir view 1 m above the average canopy height. A 34-size class AGM battery sat under the operator and provided the data system electrical power supply.
Data suffered reduced input from Conley. Although every effort was afforded to capture adequate quality across all metrics, experiment exterior considerations were such that canopy temperature data is absent, and canopy height is weak due to technical underperformance. Thankfully, reflectance data quality was maintained or improved through the implementation of new hardware by Bronson.
See included README file for operational details and further description of the measured data signals.
Summary:
Active optical proximal cotton canopy sensing spatial data and including few additional related metrics and weak low-frequency ultrasonic derived height are presented.
Agronomic nitrogen and irrigation management related field operations are listed.
Unique research experimentation intermediate analysis table is made available, along with raw data.
The raw data recordings, and annotated table outputs with calculated VIs are made available.
Plot polygon coordinate designations allow a re-intersection spatial analysis.
Data was collected in the 2014 season at Maricopa Agricultural Center, Arizona, USA.
High throughput proximal plant phenotyping via electronic sampling and data processing method approach is exampled using a modified high-clearance Hamby spray-rig.
Acquired data conforms to location standard methodologies of the plant phenotyping.
SAS and GIS compute processing output tables, including Excel formatted examples are presented, where data tabulation and analysis is available. Additional ultrasonic data signal explanation is offered as annotated time-series charts.
The weekly proximal sensing data collected include the primary canopy reflectance at six wavelengths. Lint and seed yields, first open boll biomass, and nitrogen uptake were also determined. Soil profile nitrate to 1.8 m depth was determined in 30-cm increments, before planting and after harvest. Nitrous oxide emissions were determined with 1-L vented chambers (samples taken at 0, 12, and 24 minutes). Nitrous oxide was determined by gas chromatography (electron detection detector).

凯文·布朗森博士提供了一组独特的棉花农业氮肥与水分管理研究数据集，该数据集包含计算所需的信息，其中包括田间事件和操作记号、关联和计算参数的中级分析巨表，以及实验过程中产生的实验室分析结果，以及SAS过程输出的高分辨率地块级别中级数据分析表，以及完整的原始数据传感器记录器输出。该数据集采用Hamby装置作为高吞吐量近植物表型分析平台进行收集。Hamby 6000装置（Ellis W. Chenault, & Allen F. Wiese, 1989年，《高通行道地块喷雾器的构建》， Weed Technology，第3卷第4期，第659–662页，http://www.jstor.org/stable/3987560）。布朗森博士对旧款的高通行道Hamby 6000装置进行了改进，增加了带有后喷杆的储罐和泵，以执行精确的液体氮应用。Raven控制单元配合GPS提供了变量率配送选项。12伏荷兰科学GeoScoutX数据记录仪及其配备GPS信号的CropCircle ACS-470传感器，作为车辆上的附加坚固数据采集模块，易于安装和运行，并允许使用定制的近场主动光学反射率传感技术测量植物。HS数据记录仪位于操作员附近，传感器位于装置前方突出臂架上，紧邻液压前喷杆组件，向下朝向地面，位于平均冠层高度以上1米处。一个34号尺寸的AGM电池位于操作员下方，为数据系统提供电力供应。尽管尽最大努力捕捉所有指标的高质量数据，但由于实验外部因素的影响，冠层温度数据缺失，冠层高度数据因技术性能不足而较弱。幸运的是，通过Bronson实施的新硬件，反射率数据质量得以维持或提高。有关操作细节和测量数据的进一步描述，请参阅所附的README文件。总结如下：提供了主动光学近场棉花冠层空间数据，包括少量其他相关指标和弱低频超声波衍生的冠层高度。列出了与农业氮肥和灌溉管理相关的田间操作。提供独特的实验实验中级分析表，以及原始数据。提供了原始数据记录和带有计算VI的注释表格输出。地块多边形坐标标识允许进行重新交错的时空分析。数据收集于2014年在美国亚利桑那州马里科帕农业中心。通过改进的高通行道Hamby喷雾装置，示例了高吞吐量近植物表型分析的电采样和数据处理方法。收集的数据符合植物表型定位标准方法。展示了SAS和GIS计算处理输出表格，包括Excel格式示例，其中提供数据汇编和分析。提供了附加超声波数据信号的注释时间序列图表。每周收集的近场传感数据包括六个波长的冠层反射率。还确定了棉短绒和种子产量、首次开放的棉桃生物质和氮的吸收。在种植前和收获后，以30厘米为增量确定了土壤剖面1.8米深度的硝酸盐含量。使用1升通风室（在0、12和24分钟取样）测定了一氧化二氮排放。一氧化二氮通过气相色谱法（电子检测器）测定。