Miten vältän maan haitallisen tiivistymisen maatalousrenkaiden avulla?

Translated title of the contribution: How to avoid soil compaction with better tires?

Tuomas J Mattila, Jukka Aaro Rajala

Research output: Book/ReportCommissioned reportProfessional

Abstract

Soil compaction is a common problem of agricultural soils. Machinery is heavier than before, which increases loads on soil. When soil is compacted, its bulk density is increased and pore space is reduced, which reduces key agricultural properties such as water holding capacity, water infiltration rate and gas exchange. As a consequence crops have weaker roots, resulting in lower nutrient uptake and weak yields.

Agricultural tires have developed considerably during the last years. Properly dimensioned tires can reduce soil compaction risks considerably. The main factors for soil risks are wheel load and tire pressure. New tires can carry larger loads with low tire pressures, which reduces soil compaction risks. However the possibilities of reducing wheel loads should not be ignored, as they may offer very cost effective solutions for reducing compaction. It is important to look at the whole equipment fleet, to identify the machines with the highest risks and focus the risk mitigation effort to those machines. A diversified crop rotation can offer possibilities for reducing the size and weight of equipment without losing timeliness.

If wheel loads cannot be reduced through resizing equipment, they can be reduced through addition of more wheels (dual and bogie wheels). Lower wheel loads allow reduced tire pressures, but the pressures have to be adapted to working conditions. Using the right pressure for each situation is easier, if a table with the pressures for each operation is stored at the tractor and the tires are equipped with a low cost pressure adjustment valves (e.g. Air-booster kit).

Upgrading the tires to high flexion and large air volume tires (IF and VF-tires) can enable much lower tire pressures and therefore lower compaction risks. However upgrading tires requires a careful consideration of the technical properties (rolling circumference, diameter, loaded radius, bearing capacity at different pressures) of available alternatives. Finding an optimal tire for an individual farm requires time and thought. New tools such as Terranimo offer decision support for choosing tires and evaluating the effect of different tires to soil compaction.

There are situations, where compaction risks cannot be minimized through tires due to very high wheel loads. In these cases controlled traffic farming (CTF) can be used to limit the compaction into certain zones in the field.

This report describes planning methods and tools for evaluating soil compaction risks. In addition, farm level examples are given on compaction reduction through better farm tires.
Translated title of the contributionHow to avoid soil compaction with better tires?
Original languageFinnish
Place of PublicationMikkeli
PublisherRuralia-instituutti
Number of pages41
ISBN (Electronic)978-951-51-3750-0
Publication statusPublished - 2018
MoE publication typeD4 Published development or research report or study

Publication series

NameRaportteja
PublisherRuralia-instituutti
No.175
ISSN (Electronic)1796-0630

Fields of Science

  • 4111 Agronomy

Projects

Datasets

Koneen tasapainotuslaskuri

Mattila, T. J. (Creator) & Rajala, J. (Creator), Ruralia-instituutti, 5 Dec 2017

Dataset

Tiivistymislaskuri 2018

Mattila, T. J. (Creator) & Rajala, J. (Creator), Ruralia-instituutti, 5 Dec 2017

Dataset

Activities

  • 1 Oral presentation

Miten löydän tilalleni sopivimman ratkaisun?

Tuomas J Mattila (Speaker), & Jukka Rajala (Speaker)

18 Jan 2018

Activity: Talk or presentation typesOral presentation

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