Harvest Timing of Standing Corn Using Near-Infrared Reflectance Spectroscopy
Abstract
:1. Introduction
2. Materials and Methods
2.1. Field Sampling
2.2. Calibration Development
3. Results and Discussion
3.1. Method 1
3.2. Method 2
3.3. Method 3
4. Conclusions
Author Contributions
Funding
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Parameters | Ear Moisture Content | ||||||
---|---|---|---|---|---|---|---|
Units | %w.b. | ||||||
SEL | 0.35 | ||||||
N | 610 | ||||||
Min | 26 | ||||||
Mean | 49 | ||||||
Max | 75 | ||||||
SD | 9.6 | ||||||
Instruments included | All | 1 | 2 | 3 | 1 & 2 | 2 & 3 | 1 & 3 |
SEC | 2.8 | 2.6 | 2.6 | 3.8 | 2.6 | 2.8 | 2.6 |
R²C | 0.92 | 0.94 | 0.92 | 0.84 | 0.93 | 0.92 | 0.93 |
SECV | 2.8 | 2.5 | 2.8 | 3.8 | 2.6 | 2.9 | 2.7 |
R²CV | 0.91 | 0.93 | 0.91 | 0.84 | 0.93 | 0.91 | 0.92 |
Number of terms | 8 | 6 | 6 | 6 | 8 | 6 | 8 |
Segments | 10 | ||||||
Wavelength range/step (nm) | 1350–2550/5 1 | ||||||
Pretreatments | D-2,2,11 2 | ||||||
Regression method | PLS |
Parameters | Ear Moisture Content | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Units | %w.b. | |||||||||||||||
N | 330 | |||||||||||||||
Min | 37 | |||||||||||||||
Mean | 55 | |||||||||||||||
Max | 80 | |||||||||||||||
SD | 10 | |||||||||||||||
Instrument 1 | All→All | All→1 | All→2 | All→3 | 1→1 | 1→2 | 1→3 | 2→1 | 2→2 | 2→3 | 3→1 | 3→2 | 3→3 | 1&2→3 | 2&3→1 | 3&1→2 |
R²P | 0.93 | 0.93 | 0.93 | 0.91 | 0.93 | 0.91 | 0.89 | 0.84 | 0.93 | 0.91 | 0.88 | 0.88 | 0.88 | 0.83 | 0.87 | 0.92 |
RMSEP | 2.9 | 1.6 | 1.6 | 1.8 | 2.9 | 5.2 | 3.4 | 5.9 | 2.8 | 6.4 | 4.4 | 5.0 | 4.4 | 4.9 | 2.7 | 2.8 |
SEP | 2.8 | 1.6 | 1.6 | 1.8 | 2.8 | 3.0 | 3.4 | 2.8 | 2.7 | 3.3 | 3.7 | 3.6 | 3.7 | 3.2 | 2.6 | 2.7 |
Bias | 0.52 | 0.33 | 0.62 | 0.61 | 0.62 | 4.2 | 0.28 | 5.2 | 0.61 | 5.4 | 2.3 | 3.5 | 2.3 | 3.7 | 2.7 | −0.96 |
Intercept | 8.6 | 9.0 | 7.4 | 9.4 | 9.2 | 10 | 9.6 | 14 | 7.2 | 17 | 15 | 14 | 15 | 13 | 9.7 | 3.6 |
Slope | 0.85 | 0.84 | 0.88 | 0.84 | 0.84 | 0.89 | 0.83 | 0.84 | 0.88 | 0.78 | 0.77 | 0.80 | 0.77 | 0.83 | 0.87 | 0.92 |
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Digman, M.F.; Cherney, J.H.; Cherney, D.J.R. Harvest Timing of Standing Corn Using Near-Infrared Reflectance Spectroscopy. Sensors 2024, 24, 1397. https://doi.org/10.3390/s24051397
Digman MF, Cherney JH, Cherney DJR. Harvest Timing of Standing Corn Using Near-Infrared Reflectance Spectroscopy. Sensors. 2024; 24(5):1397. https://doi.org/10.3390/s24051397
Chicago/Turabian StyleDigman, Matthew F., Jerry H. Cherney, and Debbie J. R. Cherney. 2024. "Harvest Timing of Standing Corn Using Near-Infrared Reflectance Spectroscopy" Sensors 24, no. 5: 1397. https://doi.org/10.3390/s24051397
APA StyleDigman, M. F., Cherney, J. H., & Cherney, D. J. R. (2024). Harvest Timing of Standing Corn Using Near-Infrared Reflectance Spectroscopy. Sensors, 24(5), 1397. https://doi.org/10.3390/s24051397