منابع مشابه
Soil Sampling
J Ste Fundin … and jus The U.S. and applic identity, r status, sex program, funded by activities.
متن کاملThe Netherlands Soil Sampling Program
Soil data users in The Netherlands were inventoried for current and future data needs. Prioritized data needs were used to design the Netherlands Soil Sampling programme (NSSP) as a framework containing 3 groups of related projects: map upgrading, map updating and upgrading of pedotransfer functions. In each one group, the sampling design, performance criteria and optimal sample size were defin...
متن کاملComparison of Sampling Strategies for Characterizing Spatial Variability with Apparent Soil Electrical Conductivity Directed Soil Sampling
Spatial variability has a profound influence on a variety of landscape-scale agricultural issues including solute transport in the vadose zone, soil quality assessment, and site-specific crop management. Directed soil sampling based on geospatial measurements of apparent soil electrical conductivity (ECa) is a potential means of characterizing the spatial variability of any soil property that i...
متن کاملManagement Zones Soil Sampling: a Better Alternative to Grid and Soil Type Sampling?
Global positioning systems (GPS), yield monitors, various forms of remote sensing, new computer software, and variable rate technology are new tools available to producers. Intensive soil sampling and crop scouting methods that directly relate each sample or measurement with their geographical coordinates complement the new technological package. Soil testing is a diagnostic tool that adapts we...
متن کاملUse of Soil Electroconductivity in a Multistage Soil-Sampling Scheme
The inherent variability of pasturelands makes it difficult to sample soils and accurately characterize a pasture. Indirect methods such as soil electroconductivity (EC) can be used to rapidly, noninvasively, and inexpensively quantify soil variability. The objective of this study was to determine if rapidly collected, georeferenced soil information could be used to propose an accurate, multist...
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ژورنال
عنوان ژورنال: Soil Science
سال: 1920
ISSN: 0038-075X
DOI: 10.1097/00010694-192001000-00005