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January/February 2022 | Saulo Guerra

Morooka / FMCopling spraying forestry tractor

Stand Tending

Machinery

Background
One of the main proposals of the Cooperative Program on Forest Mechanization and Automation (PCMAF), led by Prof Saulo Guerra, and Dr Guilherme Oguri, which is part of the Forest Research Institute (IPEF), is to develop, research and innovate in new tractors for planted forests. This project started in 2018, after extensive research of new and adequate tractor models for the commercial planted forest in Brazil. In 2019, Morooka´s Brazilian Dealer – EMBARK, offered the tractor and engineering R&D which was adapted to build a newer and valuable machine. Furthermore, FMCopling, a national sprayer manufacturer, designed and assembled three different units – wind box sprayer, 12-meter and 3-meter boom sprayers. Along 2020 and 2021, field evaluation was carried out in four forestry sites with different soil conditions, weed and silviculture status.

Initial setup and measurements
The model selected for this application was the Morooka MST 800VD, originally a rubber crawler tractor with a dumpling bed used for mining and construction purposes.
Specification Unit


To transform the rubber crawler tractor into a forest silviculture machine, the dumping bed was replaced by a wind box sprayer or any of the two boom sprayer, described below



A partnership was established with PhD. Prof. Fabricio Leite (from Maringa State University - UEM) with this new setup assembled. The gravity centre, theoretical and operational angle limits were determined (as shown below) according to the Brazilians Standards (ABNT NBR ISO 16231-2 and ABNT NBR ISO 789-6).


First results
According to the first report, using a 12m boom sprayer, it was possible to apply an 18m width herbicide in the total area before eucaplyt planting. This operation could apply a pre-and post-emergence herbicide before planting at 3.5 km h-1 maximum working speed with 350 l ha-1 volume of spray. The machine availability was very positive for its first field operation, being 79% and the theoretical field capacity 2,82 ha h-1. This year, Forsilvitech will bring more detailed results for each implement evaluated in different sites and forest conditions.
So, stay tuned and follow us at: Forsilvitech