M

Magellan WAAS receivers, 195 Magnetic compass, 4

Magnetic dipole soil conductivity meters, 274

Magnetic field, 6, 110-111, 147-148, 149-151, 153

Magnetic induction, 111

Magnetic loop, 117

Magnetometers, 4, 148-149

Magnetometry, 3, 5, 149-151

Magnetometry methods, 6

agricultural applications, 151-152

data processing and analysis, 149-151

defined, 388

field principles, 149

introduction, 147-148

locate subsurface drain lines, 9

magnetic susceptibility, 7 types of magnetometers, 148-149 MALA Geoscience, 325

Management-induced spatiotemporal monitoring, 32, 34, 60, 77

Management practices, 263, 270-271 Management System Evaluation Area (MSEA), 203, 205 Manure/compost application comparison, 274 Mapping. See also Soil mapping agricultural geophysics, 200 apparent electrical conductivity, 265-267 ArcView GIS, 227 bulk density, 106 cost-effective technologies, 264 data preparation and processing, 121-123 dipole-dipole array, 95 EM-ECa technique, 222 and EMI, 287 farm field map, 11-12 GIS, 200-203 GIS concepts, 200-203 golf green drainage system, 347, 349-350, 351 GPR amplitude map, 370 ground-level measurements, 292-294 HCP and PRP arrays, 288-289 herbicides, 241-242 inherent soil properties, 214 log-log scatterplot, 299 measurement and soil samples, 242 pesticide partition coefficients, 233-234 potential of herbicide applications, 237-238 productivity zones, 264 projects, 194-196 SAREC, 283 software, 149, 196 soil and yield baseline, 281 soil conductivity, 273 soil drainage classes, 255, 260 soil properties, 33, 226 soil texture, 59

soil volumetric water content, 346 subsurface features, 354

time-slice amplitude maps, 355, 358-361, 365, 371-372 utility of ECa, 71 yield and ECa, 284-286 and yield heterogeneity, 268 Map projection, 204

Map Unit Interpretations Record (MUIR), 206-207

Master control station and errors, 182

Mathematical models, 124, 166

MathWorks, Inc., 343

Maximum reflection amplitude, 330-332

Maxwell, James Clerk, 110, 111

Maxwellian physics, 125-126

Maxwell's equation, 130

Measurement apparent electrical conductivity, 219, 227 electrical conductivity, 235 GPR method, 347-348 principles, 295 range, 236

resistive load impedance, 27 of soil ECa, 62, 63-64

soil electrical conductivity, 21 soil salinity, 19-21

soil volumetric water content, 18, 24-26 of water content, 24-26 Wenner array, 62 Measurement error, 295 Metal detectors, 121 Meteorology, 3 Methodology, 318-319 Microbial-scale measures, 267, 269 Microelectronics advances, 26 Microsoft Corp., 341 Mineral, 153 MINITAB, 219, 227

MLR. See Multiple linear regression (MLR)

Mobile measurement equipment, 28-29, 296

Mobilization, 19, 21

Model-based sampling, 30, 69

Modeling software, 321

Mode of sensor transport, 119

Modernization/other satellite systems, 194

Moisture measurement, 60

Molar concentrations of ions, 61

Mollisols and soils with mollic epipedons, 47

Monitoring stations, 167

Morainic soils, 218, 226

Moving-mode arrangement, 137

MSEA. See Management System Evaluation Area (MSEA) MT. See Telluric, magnetelluric (MT) method Multielectrode array, 296 Multipath (GPS), 172

Multiple linear regression (MLR), 250, 251 Multisensor systems, 13

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