摘要：Numerous scient.fic challeng.s arise when desig.ing.a soil monit.ring.net.ork (SMN), especially when assessing.larg. areas and several propert.es t.at.are driven by numerous cont.olling.fact.rs of various orig.ns and scales. Different.broad approaches t. t.e est.blishment.of SMNs are dist.ng.ished. It.is essent.al t. est.blish an adequat. sampling.prot.col t.at.can be applied rig.rously at.each sampling.locat.on and t.me. We make recommendat.ons reg.rding.t.e wit.in-sit. sampling.of soil. Different.st.t.st.cal met.ods should be associat.d wit. t.e different.t.pes of sampling.desig.. We review new st.t.st.cal met.ods t.at.account.for different.sources of uncert.int.. Except.for t.ose paramet.rs for which a consensus exist., t.e quest.on of t.st.ng.met.od harmonisat.on remains a very difficult.issue. t.e est.blishment.of benchmark sit.s devot.d t. harmonisat.on and int.r-calibrat.on is advocat.d as a t.chnical solut.on. However, t. our present.knowledg., no st.dy has addressed crucial scient.fic issues such as how many calibrat.on sit.s are necessary and how t. locat. t.em.