Soil salinity in 1975 in an irrigated district watered by the 2nd and 3rd sections of the first part of Monegros Canal (Huesca, Spain)

Salinity is a time-variable characteristic trait of the soils, as is well known in the irrigated lands. Tracking the variation of soil salinity along time is a way to evaluate the effects of irrigation in agricultural lands or in their surroundings. Such evaluations can enable warning and even implementing corrective actions if salinity underwent undesirable evolution. The data presented here come from a heritage report commissioned by IRYDA, the organism in charge of new irrigation projets within the Spanish Ministry of Agriculture. We have organized the data in three files: • File "Augerings 1975 Monegros.docx", a list of the 519 soil samples taken by hand-auger in 1975 at 183 sites. The list shows the refernce of the sampling site, the depth of each sample, the electrical conductivity at 1:5 dilution, and the pH at 1:1 dilution; • File "Coordinates 1975 Monegros.docx", the UTM coordinates of the sampling sites; and • File "Marked contacts CETFA Monegros1972 and diagram.zip”, the scannings in pdf format of the 176 contacts aerial photographs from a flight of 1972 that have marks of the surveyors for the localization of the sampling sites. This zip file also contains the flight diagram in pdf format. The time elapsed and the changes in the irrigation techniques in the district, where now is becoming majoritarian the pressurized application of water, reinforce the interest of this dataset for multitemporal evaluations with agronomical or environmental purposes.土壤盐度是随时间变化的土壤特性，这一点在灌溉区域已是共识。追踪土壤盐度的时序变化，是评估农田及其周边区域灌溉影响的有效手段。当盐度出现不良演化趋势时，此类评估可辅助发出预警，甚至为实施矫正措施提供依据。本次发布的数据源自IRYDA委托撰写的一份历史报告——IRYDA为西班牙农业部下辖负责新型灌溉项目的主管机构。 我们将数据整理为三个文件： • 文件"Augerings 1975 Monegros.docx"：收录了1975年在183个采样点通过手持土钻采集的519份土壤样品清单，内容包含采样点标识、每份样品的采集深度、1:5土水比浸提液的电导率，以及1:1土水比浸提液的pH值； • 文件"Coordinates 1975 Monegros.docx"：包含各采样点的UTM坐标； • 文件"Marked contacts CETFA Monegros1972 and diagram.zip"：包含1972年航空飞行拍摄的176张航测照片的PDF扫描件，这些照片带有测量人员标记的采样点定位标识，该压缩包同时附带了飞行航线图的PDF文件。 该区域随时间推移，灌溉技术已发生显著变迁，如今加压输水灌溉已成为主流灌溉方式，这进一步提升了本数据集在农艺或环境相关多时间尺度评估中的研究价值。