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"Texas has a long, romantic history when it comes to railroads. But even though steam engines and streetcars offer nonstop service to Nostalgia City, there's a dark side to Texas rail. The Black Widow of Fort Worth engineered a fatal double-cross at a railroad crossing. The Mountaineer Madman brought death to the Texas Electric Railway, while the Trolley Bandit terrorized the citizens of El Paso. From a freak accident involving a banana peel to a tragic trip to see Santa Claus, Jeff Campbell and the staff of the Interurban Railway Museum cross the Lone Star State on trains derailed by murder and mayhem."--

Crime --- Railroads --- History. --- Texas.

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reisgidsen --- Verenigde Staten

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Maintaining permanent coverage of the soil using crop residues is an important and commonly recommended practice in conservation agriculture. Measuring this practice is an essential step in improving knowledge about the adoption and impact of conservation agriculture. Different data collection methods can be implemented to capture the field level crop residue coverage for a given plot, each with its own implications for the survey budget, implementation speed, and respondent and interviewer burden. This study tests six alternative methods of crop residue coverage measurement among the same sample of rural households in Ethiopia. The relative accuracy of these methods is compared against a benchmark, the line-transect method. The alternative methods compared against the benchmark include: (i) interviewee (respondent) estimation; (ii) enumerator estimation visiting the field; (iii) interviewee with visual-aid without visiting the field; (iv) enumerator with visual-aid visiting the field; (v) field picture collected with a drone and analyzed with image-processing methods; and (vi) satellite picture of the field analyzed with remote sensing methods. Results of the methodological experiment show that survey-based methods tend to underestimate field residue cover. When quantitative data on cover are needed, the best estimates are provided by visual-aid protocols. For categorical analysis (such as greater than 30 percent cover or not), visual-aid protocols and remote sensing methods perform equally well. Among survey-based methods, the strongest correlates of measurement errors are total farm size, field size, distance, and slope. The results deliver a ranking of measurement options that can inform survey practitioners and researchers.

Agricultural Surveys --- Agriculture --- Conservation Agriculture Adoption --- Crop Residue Coverage --- Measurement Error