Table 1.
Reports of input savings from the use of ultrasonic sensors to control real-time variable rate application of inputs
| Reference | Operation | Tree crop | Input savings |
|---|---|---|---|
| Giles et al.13,15 | Spraying | Peach | 28% |
| Giles et al.13,15 | Spraying | Apple | 52% |
| Moltó et al.17 | Spraying | Citrus | 30% |
| Moltó et al.16 | Spraying | Citrus | 37% |
| Zaman et al.42 | Fertilizing | Citrus | 40% |
| Solanelles et al.48 | Spraying | Olive | 70% |
| Solanelles et al.48 | Spraying | Pear | 28% |
| Solanelles et al.48 | Spraying | Apple | 39% |
| Gil et al.49 and Llorens et al.51 | Spraying | Vineyard | 58% |
| Gil et al.50 | Spraying | Vineyard | 22% |
| Maghsoudi et al.93 | Spraying | Pistachio | 34% |
| Average | 40% |