The change in soil carbon (C) concentration, soil pH and major nutrients for approximately 1,000 topsoil sampled from on‐farm experimental sites over a thirty‐year period from 1950 to 1980 in north‐east Scotland are summarized. This period coincided with increased agricultural intensification, which included regular liming and fertilizer additions. During 2017, 37 of these sites were resampled and reanlaysed. While pH and extractable phosphorus (P) and potassium (K) increased over this period, there was no detectable change in the percentage loss on ignition. Composite soil samples were taken by auger from a depth of 0–15 cm and compared with the corresponding archived samples collected at the initiation of each experiment. Analysis of these resampled soils indicated no significant change in soil carbon (C), although soil pH, extractable magnesium (Mg) and K and Nitrogen (N) concentrations were significantly greater (p < .001) but extractable soil P concentration was significantly less (p = .015) compared with the original samples. Even though measuring C concentration alone is a poor indicator of overall changes in soil C stocks, it does provide a relative quick “early warning” of C losses that would justify a more comprehensive measure of stocks.

中文翻译：

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某些苏格兰农业土壤的碳浓度和其他土壤性质的变化：重新采样活动的证据

总结了从1950年到1980年的30年间，在苏格兰东北部从农场实验点采样的大约1000种表层土壤的土壤碳（C）浓度，土壤pH值和主要养分的变化。这一时期恰逢农业集约化加剧，其中包括定期撒石灰和添加肥料。在2017年期间，对这些站点中的37个进行了重新采样和重新分配。尽管在此期间pH值以及可提取的磷（P）和钾（K）有所增加，但灼烧百分率的损失没有可检测到的变化。用螺旋钻从0–15 cm的深度采集复合土壤样品，并将其与每个实验开始时收集的相应存档样品进行比较。对这些重新采样的土壤进行分析后发现，尽管土壤pH值，p  <.001），但 与原始样品相比，可提取的土壤P浓度要低得多（p = .015）。尽管仅测量C浓度不足以指示土壤C储量的总体变化，但它确实提供了相对快速的“早期预警” C损失，这将有理由更全面地测量储量。