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Long He, Jianfeng Zhou, Qin Zhang, and Manoj Karkee

harvesting. Vibration or shaking is one of the widely used methods for mechanical harvesting of tree fruit crops. To obtain the fundamental information for mechanical harvesting with vibration, researchers analyzed limb stiffness ( Erdoğan et al., 2003

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L. A. G. van Heek and H. H. Adem

Abstract

A low cost single sided harvester with a multi-level catching device was designed to harvest fruit from Tatura Trellis trees planted at 6 × 1 m. Limb Shakers were used to remove cling peaches (Prunus persica (L.) Batsch) and the machine-harvested fruit showed fewer injuries than fruit picked by contract labor. Although the machine harvested peaches had a greater proportion of cut fruit, the percentage of bruised fruit was significantly lower. Bruising was shown to be a function of flesh firmness for both harvesting methods. ‘Williams’ Bon Chretien’ (‘Bartlett’) pears (Pyrus communis L.) were harvested with a trunk shaker from single trellis type limbs in a standard orchard which had been modified for mechanical harvesting. Comparisons between the trellis harvester, a 2-unit Catchall harvester and fruit picked by contract labor showed that the proportion of bruised fruit was lowest for the trellis harvester. Relationships were established between the location of pears within the canopy of trellis type limbs and damage to fruit. Trunk shaking caused displacement of fruit and branches resulting in damage to fruit. Results show that trellis pear trees may be suitable for mechanical harvesting if fruit is used for processing.

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Timothy M. Spann and Michelle D. Danyluk

, Brazilian citrus growers were able to deliver frozen concentrated orange juice to the port of Tampa, FL, for only $0.0757 more per pound solids than Florida growers. For these reasons, Florida has been working to develop mechanical harvesting technology

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Timothy M. Spann, Luis V. Pozo, Igor Kostenyuk, and Jacqueline K. Burns

only $0.0757 more per pound soluble solids than Florida growers. This discrepancy in production costs has been a major driving force in Florida's efforts to develop mechanical harvesting technology ( Florida Department of Citrus, 2010 ; Whitney, 1995

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Isaac Zipori, Arnon Dag, Yizhar Tugendhaft, and Reuven Birger

test different mechanical-harvesting approaches for processing at a reasonable cost with low labor demand. Mechanical harvesting of table olives has been studied since 1975 ( Ferguson et al., 2012 ; Vega Macias et al., 2005 ; Zion et al., 2011

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Luis Rallo

planted with 70–100 trees/ha. After World War II, rural migration increased production costs, and mechanical harvesting became compulsory. Since then, these plantations have begun to be replaced by high-density mechanically harvested orchards. Rain

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Bruno Casamali, Jeffrey G. Williamson, Alisson P. Kovaleski, Steven A. Sargent, and Rebecca L. Darnell

-fold in labor efficiency and a cost reduction of ≈85% when using over-the-row mechanical blueberry harvesters. However, mechanical harvesting causes excessive fruit bruising ( Sargent et al., 2013 ) and harvest losses. Bruising occurs when berries hit

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justn R. Morris

Abstract

The research program on fruit crops at the University of Arkansas interrelates the areas of harvest mechanization, pre- and postharvest physiology and processing. This program is designed to serve a highly competitive, growing processing industry. Through cooperative research undertaken by the Departments of Horticultural Food Science and Agricultural Engineering, mechanical harvesters were developed for blackberries (refer HortScience 13:228-235) and strawberries (refer HortScience 13:000-000). Utilizing the principle of fruit abscission, blackberry fruit can be selectively mechanically harvested on a commercial basis at the rate of 1 acre per hour, while product quality is superior to hand-harvested fruit.

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Adam Karl, Whitney Knickerbocker, and Gregory Peck

/or market demands. Mechanical harvesting fresh-market apples has been studied since the 1970s, but it has proven difficult to develop machinery that can efficiently harvest fruit without bruising ( Sarig, 1993 ; Zhang et al., 2016 ). Only recently have

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Josep Rufat, Agustí J. Romero-Aroca, Amadeu Arbonés, Josep M. Villar, Juan F. Hermoso, and Miquel Pascual

In recent years, the increasing consumption of olive oil has boosted the planting of intensive and superintensive orchard systems to achieve competitive production costs ( Arbonés et al., 2014 ). Continuous mechanical harvesting is a key management