Development of an Over-The-Row Peach Harvester

Webb, B. K.; Hood, C. E.; Jenkins, W. H.; Veal, C. D.

doi:10.13031/2013.37540

Cited by 3 publications

(4 citation statements)

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“…The data used in this study are freely and publicly available through the Arctic Data Center. Field measurements: Alexander et al., 2020; Carbon stock estimates: Webb et al., 2023. Code used to derive dNBR, perform analyses, and create figures is available through at E. Webb 2023.…”

Section: Data Availability Statementmentioning

confidence: 99%

Fire‐Induced Carbon Loss and Tree Mortality in Siberian Larch Forests

Webb,

Alexander,

Paulson

et al. 2024

Geophysical Research Letters

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Climate change is intensifying the fire regime across Siberia, with the potential to alter carbon combustion and post‐fire carbon re‐accumulation trajectories. Few field‐based estimates of fire severity (e.g., carbon combustion and tree mortality) exist in Siberian larch forests (Larix spp.), which limits our ability to project how an intensified fire regime will affect regional and global climate feedbacks. Here, we present field‐based estimates of fire‐induced tree mortality and carbon loss in eastern Siberian larch forests. Our results suggest that fires in this region result in high tree mortality (means of 83% and 76% at Arctic and subarctic sites, respectively). In both absolute and relative terms, aboveground carbon loss following fire is higher in Siberian larch forests than in North America, but belowground carbon loss is considerably lower. This suggests fundamental differences in wildfire behavior and carbon dynamics between dominant vegetation types across the boreal biome.

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Section: Data Availability Statementmentioning

confidence: 99%

Fire‐Induced Carbon Loss and Tree Mortality in Siberian Larch Forests

Webb,

Alexander,

Paulson

et al. 2024

Geophysical Research Letters

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“…Moreover, an equation of the relationship between the detachment force and the vibration frequency and amplitude was established in this paper. The equation shows that the detachment force of walnut fruits under forced vibration is proportional to S 1 F 1 2 . In contrast with only determining the relationship between the vibration response of fruits and a certain vibration parameter, in this study, the relationship was expanded to the joint action of the vibration frequency and amplitude, with the association being established using a specific equation in a more intuitive way.…”

Section: Relationship Between the Detachment Force And The Vibration ...mentioning

confidence: 99%

“…Forest fruits are produced in more than 170 countries, and their production contributes to the agricultural economy and farmers' income [1]. Fruit harvesting, an essential component in fruit production, is characterized by strong seasonality and high labor intensity [2]. The common method of harvesting forest fruits is the use of manual labor [3,4], but the cost of such harvesting is high, as the manual labor force accounts for a large proportion of the total labor force in the overall production process [2,5].…”

Section: Introductionmentioning

confidence: 99%

“…Fruit harvesting, an essential component in fruit production, is characterized by strong seasonality and high labor intensity [2]. The common method of harvesting forest fruits is the use of manual labor [3,4], but the cost of such harvesting is high, as the manual labor force accounts for a large proportion of the total labor force in the overall production process [2,5]. Mechanized harvesting is thus a crucial component in forest fruit production [6].…”

Section: Introductionmentioning

confidence: 99%

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Vibration Response of Walnuts under Vibration Harvesting

Liu

Cao

2023

Agronomy

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Vibration harvesting is a promising method for walnut production owing to its low cost and high efficiency. However, current research focuses on simulation analysis and lacks a theoretical model explaining the walnuts’ specific vibration response. This affects the design of the input vibration parameters during harvesting and thus reduces the harvesting efficiency. In this paper, a novel theoretical model of walnuts during vibration harvesting was established to analyze the vibration response, including the motion morphology (motion trajectory and dropping position) and detachment force. A field test was then carried out to verify the theoretical model. The theoretical and experimental results showed that the motion trajectory of the walnuts during vibration harvesting is similar to an ellipse, and the dropping position is at either of the two end points of the trajectory. The detachment force was found to be proportional to the vibration amplitude and the square of the vibration frequency theoretically. This paper provides a theoretical reference for designing the optimal input vibration parameters of a harvesting device to improve the harvesting rate of walnuts.

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Ripening Patterns within a Peach as Indicated by Force and Soluble Solids Concentration

Horton¹

1992

jashs

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Variability in maturity within a peach (Prunus persica, L. Batsch) fruit was estimated by measurements of force and the soluble solids concentration (SSC) at 16 coordinates around the peach at five maturity stages: 1) about one-half final swell (immature); 2) 85% final swell (green); 3) firm-ripe and similar to chip #3 of the Clemson Univ. system; 4) firm-ripe and similar to chip #5; and 5) tree-ripe. Firm-ripe 3 and 4 stages were firm enough to ship, but the tree-ripe stage was too soft. Firmness measured with a 4.7-mm-diameter penetrometer tip from two cultivars indicates a strong trend for the peach tip and cheeks to be firmer than tissue at other coordinates. Coordinates at the equator and around the stem end are generally firmer than coordinates at lat. 45°N, particularly in stages 3, 4, and 5. The SSC in juice from a cylinder of fruit adjacent to the puncture was higher at long. 90°E-W than at the sutures and higher at lat. 0° than at 70°S. Variance increased for force and decreased for SSC between maturity stages to the firm-ripe stage. The coordinate technique might be used to characterize and select cultivars that would be most suitable for once-over harvests.

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Development of an Over-The-Row Peach Harvester

Cited by 3 publications

References 0 publications

Fire‐Induced Carbon Loss and Tree Mortality in Siberian Larch Forests

Fire‐Induced Carbon Loss and Tree Mortality in Siberian Larch Forests

Vibration Response of Walnuts under Vibration Harvesting

Ripening Patterns within a Peach as Indicated by Force and Soluble Solids Concentration

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