Abstract 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, r2, 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.
[1]
Calvin D. Perry,et al.
Dynamics of Peanut Flow Through a Peanut Combine
,
1996
.
[2]
Hermann Auernhammer,et al.
Automatic Data Acquisition on Round Balers
,
1994
.
[3]
H. Auernhammer,et al.
Yield Measurement on Self Propelled Forage Harvesters
,
1995
.
[4]
Vern Hofman,et al.
In Field Yield Monitoring of Sugarbeets
,
1995
.
[5]
Hendrik Colijn.
Weighing and proportioning of bulk solids
,
1983
.
[6]
I. Ohlsson.
Book reviewSite-specific management for agricultural systems: P.C. Robert, R.H. Rust and W.E. Larson (Editors). American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America, Madison, WI, 1995. ISBN 0-89118-127-X, Paperback, 993 pp., US$ 39
,
1996
.
[7]
J. de Baerdemaeker,et al.
Continuous wheat yield measurement on a combine
,
1991
.