Title: An automatic depth control system for on-line measurement of spatial variation in soil compaction
Abstract: INTRODUCTION Problem Soil compaction is usually measured manually by means of different penetrometers and core samplers, referring to soil penetration resistance and dry bulk density, respectively. Based on these measurements 2D and 3D soil compaction maps can be constructed regardless of soil surface unevenness. Since these manual measurements are difficult and time costly, some trials have recently started to focus on the on-line measurement of soil compaction, using different mathematical models and measurement techniques. Mouazen et al. (2003) developed a model to calculate soil compaction indicated as dry bulk based on measured draught of a subsoiler, soil moisture content and depth. Since the formula for prediction of the soil compaction based on the draught measurement also depends on the cutting depth, the depth variations of 0.07 m when using two depth wheels are too large to obtain reliable soil compaction predictions. As a consequence, it is impossible without depth measurement to distinguish whether a higher draught is the result of a higher compaction or of a deeper measurement. This makes these compaction maps difficult to interpret and rather useless for the farmer. An automatic depth control system will eliminate the depth variation problem during the on-line measurement of soil compaction, allowing the development of fixed depth soil compaction maps.
Publication Year: 2004
Publication Date: 2004-01-01
Language: en
Type: article
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Cited By Count: 1
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