In Field Yield Monitoring of Sugarbeets

Hofman, Vern; Panigrahi, Sufanjan; Gregor, Brian; Walter, J. D.

doi:10.4271/952114

Cited by 9 publications

(5 citation statements)

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“…(2) total weight; or (3) the use of belt weighing methods related to the ones invented by Campbell, Rawlins, and Han (1994) and Hofman et al (1995) for potatoes, sugar beets, and tomatoes. Pelletier and Upadhyaya (1999) have developed and researched a continuous weigh-type monitor consisting of a three-idle weigh-bridge, an angle transducer, a belt speed sensor, and a DGPS receiver that successfully measures and maps tomato yield.…”

Section: Yield Monitoringmentioning

confidence: 99%

The Role of Precision Agriculture in Cropping Systems

Koch

Khosla

2003

Journal of Crop Production

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Precision agriculture is a new and developing discipline that incorporates advanced technologies to enhance the efficiency of farm inputs in a profitable and environmentally sensible manner. Yield monitoring and variable rate application are the most widely used precision technologies. Versatile guidance systems utilizing the global positioning system (GPS) and management zone approaches are also being developed to further increase productivity by reducing error, cost, and time. These technologies provide tools to quantify and manage variability existing in fields across an array of cropping systems. A review of precision farming technologies that are currently being used in the

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Section: Yield Monitoringmentioning

confidence: 99%

The Role of Precision Agriculture in Cropping Systems

Koch

Khosla

2003

Journal of Crop Production

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“…Yield monitoring systems have been reported to have measurement accuracies near 5% for potatoes (Rawlins et al, 1995) and sugar beets (Hofman et al, 1995). Pierce et al (1997) concluded that the accuracy of yield monitoring systems varies with scale.…”

Section: Additional Index Words Precision Agriculture Precision Farmentioning

confidence: 99%

Potato Yield Monitoring on Commercial Fields

Davenport¹,

Redulla²,

Hattendorf³

et al. 2002

horttech

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An accurate yield map is imperative for successful precision farming. For 3 years (1998 to 2000) two to four potato (Solanum tuberosum) fields on a commercial farm in southeastern Washington were yield-monitored using commercial yield monitoring equipment without operator interaction. Multiple potato diggers were used to harvest the fields and diggers used were not necessarily the same at each harvest. In all years, yield monitoring data were missing due to equipment failure or lack of yield monitoring equipment on all diggers. Banding, due to dissimilar calibrations, different equipment used, or differential digger performance was observed in 1998 and 2000. Based on experience described here, some yield monitor data need minimal postprocessing or correction, other data need substantial postprocessing to make them usable, and other data may not be reliable due to equipment failure, improper calibration, or other causes. Even with preharvest calibration, it is still likely that the potato yield monitor data will need differential postprocessing, indicating that yield maps lack accuracy. In addition, comparison to yield data collected at multiple points within the field, this study found that the yield monitor over estimated potato yield. Thus, with some postprocessing, a useful yield map showing within field differences is possible. However, without significant postprocessing, the practice of using multiple diggers and yield monitors for potato harvest, both within and between fields, severely limits the ability to make consistent yield maps in commercial potato operations.

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“…The conveyor in this case was set at a fixed angle. A similar system was described by Hofman et al (1995) for measuring sugarbeet yield. Another system for potatoes was described by Rawlins et al (1995), which used a pivoted table with a load cell at the free or non-pivoted end to measure tuber weight.…”

Section: Yield Measurementmentioning

confidence: 99%

“…As stated before, the use of a radiometric or a X-ray technique is not feasible in the United States for health and environmental reasons. This leaves only a few options: (i) bulk weighing/drop bucket; (ii) instrumenting the entire harvester for total weight; or (iii) the use of belt weighing techniques similar to the ones employed by Campbell et al (1994) and Hofman et al (1995) for potatoes and sweet potatoes. As the belt weighing option provides the easiest retrofit, we decided to pursue this technique.…”

Section: General Considerationsmentioning

confidence: 99%

Development of a tomato load/yield monitor

Pelletier

Upadhyaya

1999

Computers and Electronics in Agriculture

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The objective of this study was to develop a load/yield monitor for mounting on a processing tomato harvester. A continuous mass flow-ype yield-ensing device equipped with load cells and a vibration-resistant angle transducer along with a differential global positioning system (DGPS) was developed to collect spatially variable yield data in real-time. Both analog and digital signal processing were employed to maximise the accuracy of data acquisition. The yield monitoring system was calibrated, validated, and tested during the 1997 harvesting season. The coefficient of determination, r 2 , between the actual fruit weight and the yield monitor prediction was 0.997. The system was then used to measure yield variability and produce yield maps. There were significant spatial variations in processing tomato yield. The lowest 20% yielding area within a field produced less than half the tomatoes compared to the highest 20% yielding area within the same field.

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In Field Yield Monitoring of Sugarbeets

Cited by 9 publications

References 0 publications

The Role of Precision Agriculture in Cropping Systems

The Role of Precision Agriculture in Cropping Systems

Potato Yield Monitoring on Commercial Fields

Development of a tomato load/yield monitor

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