When subjecting forest products to certification the total environmental load of wood harvesting machinery should also be assessed. In this study fuel, hydraulic oil and lubricant consumption in harvesting operations in Sweden has been examined by using machine data acquired through a questionnaire. The objectives of the study were to assess the contractor and forest company owned harvesters’ a...

This paper develops a mathematical model for use in studying how to minimize the cost of operoting a mechanized retrieval system. Through the use of cost analysis, the model provides a method for comporative evaluation between information retrieval systems. The cost model divides the costs of a retrieval system into two components: system costs and user costs. In addition, it suggests that a tr...

Potato stem removal is one of the critical technical problems potato mechanized harvesting; it directly affects quality harvesting and storage. There have been several studies on mechanisms. In practice, however, was found that rate greatly influenced by posture before entered mechanism. this study, we designed a adjustment mechanism consisting elastic curtains. A test rig built to investigate ...

The New Zealand forest industry has increased its use of swing yarders when harvesting on steep slopes. Swing can more readily operate with grapple carriages, both mechanical and motorized, in comparison to tower yarders. Especially coupled mechanized felling, yarding led improved productivity safety. effective is dependent the level knowledge working capability machines. This study analyzed op...

During mechanized table grape harvesting, berries are subjected to vibration and collision, which can cause shedding damage the fruit. Research on berry has primarily focused macroscopic swing modes, reflected in integrated cluster structure idealized particle interactions, as well static response treatments. However, these approaches unable accurately explain characteristics of wobbling during...

Manual harvesting has predominated in the South African sugar industry since 1948, when sugarcane was first cropped at Compensation on the north coast of KwaZulu-Natal. However, as successive generations of labour have attained higher levels of education and their living standards have improved, employment aspirations have risen above the strenous but monotonous hand cutting of sugarcane, and t...

Low-energy and low-cost separation of microalgae from water is important to the economics of microalgae harvesting and processing. Flotation under vacuum using a vacuum gas lift for microalgae harvesting was investigated for different airflow rates, bubble sizes, salinities and harvest volumes. Harvesting efficiency (HE) and concentration factor (CF) of the vacuum gas lift increased by around 5...

In order to improve the operational performance of self-developed 4HLB-4 half-feed four-row peanut combine harvester, single-factor and multifactor field tests were conducted on key parameters affecting quality harvesting. The response surface methodology was used study effects forward speed, clamping height, picking roller rotational cleaning sieve vibrational frequency loss rate impurity rate...

Labor shortages are increasingly problematic in rural areas worldwide and, particular, the oil palm sector Colombia. Therefore, alternative methods and systems that increase labor productivity, such as using machines for collecting lifting fresh fruit bunches (FFB), needed. In cultivation, most labor-intensive process is harvesting. We aimed to assess productivity (in t · FFB/person/day) of thr...