Bruner Farm Study for Resilient Economic Agricultural Practices in Ames, Iowa

Bruner Farm Study for Resilient Economic Agricultural Practices in Ames, Iowa
Soil P analyzed by Bray P extractant. Soil K analyzed by Ammonium Acetate extractant. For MeasSoilCover estimates: Photos were taken with a Canon, 12.3 megapixel EOS Rebel T3 mounted on a Van-Guard QS-46 large format quick shoe. The monopod that the amera/shoe assembly was attached to is a Wooster Sherlock model R056 telescoping pole. A mounting racket and spirit level (part #’s MSRMB and MSRSLA respectively, available from Cropscan inc. http://www.cropscan.com/mpscs.html) were attached to the pole in a manner so that when the camera is mounted, and the bubble in the spirit level is centered, then the focal plane of the camera is perpendicular to the ground resulting in a nadir image of the ground beneath the camera. The fully extended pole camera assembly was carried diagonally across each plot in field 70/71 an East to West or West to East transect with photos being taken every 9 paces. The unit was angled in such a way that the shadow from the pole and camera was not included in the photo. In the larger plots at the Uthe farm and the Poets facility, 30 to 40 paces were taken between each photo. The self timer on the camera was set for a 10 second delay and the camera was focused before initiating the timer. In most instances, 10 seconds was ample time to maneuver the camera into position for the photo. The cameras motion stabilizer function was turned on and the18mm zoom setting was always used to capture the maximum amount of area in each photo. Cold days, and wind speeds in excess of 30mph present a challenge. Photos were downloaded from the camera with the EOS utility software supplied with the camera and analyzed with sample point version 1.51 with a grid size of 10x10 chosen. A newer version of sample point is available at http://www.samplepoint.org/. Resources in this dataset:Resource Title: Bruner Farm Study for Resilient Economic Agricultural Practices in Ames, Iowa. File Name: BrunerFarmStudy.zip

布鲁纳农场研究：艾姆斯市，爱荷华州的经济农业韧性实践研究。土壤磷含量通过布雷P提取剂进行分析，土壤钾含量通过乙酸铵提取剂进行分析。对于土壤覆盖度的估算，采用佳能12.3百万像素EOS Rebel T3相机，该相机安装于凡格德QS-46大型快速脚架上。相机/脚架组合连接的独脚架为沃斯特谢尔洛克型号R056伸缩杆。将安装夹具和水平仪（分别编号为MSRMB和MSRSLA，由Cropscan公司提供，详情请见http://www.cropscan.com/mpscs.html）固定在杆上，确保当相机安装且水平仪中的气泡居中时，相机的焦平面垂直于地面，从而获得相机下方地面的正射影像。将完全展开的杆和相机组合体沿每个地块对角线穿越70/71号地块，进行东西或西东方向的横切，每隔9步拍摄一张照片。相机角度调整以确保杆和相机的阴影不包含在照片中。在乌瑟农场和诗人设施的大地块中，每张照片之间相隔30至40步。相机自定时设置为10秒延迟，并在启动定时器之前对焦。在大多数情况下，10秒的延迟时间足以调整相机位置进行拍摄。开启相机的运动稳定器功能，并始终使用18mm变焦设置以捕捉每张照片的最大面积。寒冷的天气和超过30英里/小时的风速构成了一定的挑战。使用相机附带的EOS实用软件下载照片，并使用版本1.51的样本点软件进行分析，网格尺寸为10x10。最新版本的样本点软件可在http://www.samplepoint.org/获取。本数据集包含的资源：资源标题：布鲁纳农场研究：艾姆斯市，爱荷华州的经济农业韧性实践研究。文件名：BrunerFarmStudy.zip