On the cover: Soil sampling operations at Vallevecchia farm (Caorle, Italy) using a hydraulic sampler down to 90‐cm depth. Sampling design involved both simple random and stratified sampling design, the latter being based on apparent electrical conductivity maps. See Longo et al., “Soil apparent electrical conductivity directed sampling design for advancing soil characterization in agricultural fields,” https://doi.org/10.1002/vzj2.20060. Photo by Michele Ongarato.

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封面图片2，第19卷，第1期

封面：在Vallevecchia农场（意大利Caorle）的土壤采样操作，使用的是深度不超过90厘米的液压采样器。抽样设计涉及简单的随机抽样和分层抽样设计，后者基于明显的电导率图。参见Longo等人，“土壤表观电导率定向采样设计，以提高农业领域的土壤特性”，https：//doi.org/10.1002/vzj2.20060。摄影：Michele Ongarato。