AgFirst - Horticultural Icon LinkAgFirst - Recent Projects - Link to Environmental  informationAgFirst Recent Projects - Link to Agriculture
Agriculture
AgFirst - Horticultural Icon LinkAgFirst - Recent Projects - Link to Environmental  informationAgFirst Recent Projects - Link to Agriculture
Environmental
AgFirst - Horticultural Icon LinkAgFirst - Recent Projects - Link to Environmental  informationAgFirst Recent Projects - Link to Agriculture
Māori Agribusiness

The Effects of Exotic Forests on Soil, Ground Water, Water Quality, Air Quality and Native Flora and Fauna

Pine trees have the same effects on soil as native trees (except kauri), no more, no less.

There is strong evidence that pine forests improve soils. Approximately two-thirds of the Ngati Hine Forestry Trust land has extremely old, infertile gumland soils. It is of low natural fertility, is highly erodible and has been in short scrub eroding since well before Maori arrived in this country.

This land got this way because it previously carried dense kauri forests, most of the kauri having killed itself off long prior to the arrival of the first Polynesians.

1. All trees remove and return nutrients from and to the soil. Kauri, however returns few nutrients to the soil and makes it so poor and acidic that it eventually kills itself out. (See explanation in Reference 2).

2. Trial work in New Zealand has shown that pine trees do not degrade or kill the soil. Instead, they improve nutrient cycling in the soil and improve internal soil drainage.

3. Pine trees make the soil no more acid than native bush, certainly nothing like kauri, and recycle nutrients in the same way as native trees. Trials on sand dune forests have shownthat pine trees do not ‘leach’ soils of nutrients like kauri trees.

Read the full report.

Project Information

date
type:
SUMMARY
This research finds pine trees have the same effects on soil as native trees (except kauri), no more, no less. Read the full report.

Other Projects

AgFirst Recent Projects - Link to AgricultureAgFirst - Recent Projects - Link to Environmental  informationAgFirst - Horticultural Icon Link
Agriculture
Land Use Change Diversification in the Waikato
This project has been developed in response to recent interest from Waikato landholders to diversify their businesses through land use change.
AgFirst Recent Projects - Link to AgricultureAgFirst - Recent Projects - Link to Environmental  informationAgFirst - Horticultural Icon Link
Agriculture
AgFirst Recent Projects - Link to AgricultureAgFirst - Recent Projects - Link to Environmental  informationAgFirst - Horticultural Icon Link
Environmental
Updates to Intensive Winter Grazing Regulations
 Under the recent changes, those farmers who cannot meet the permitted activity standards will require a consent before the 2023 winter grazing period.
AgFirst Recent Projects - Link to AgricultureAgFirst - Recent Projects - Link to Environmental  informationAgFirst - Horticultural Icon Link
Environmental
AgFirst Recent Projects - Link to AgricultureAgFirst - Recent Projects - Link to Environmental  informationAgFirst - Horticultural Icon Link
Agriculture
Understanding the cost of GHG emissions in the Agri sector
Farmers will face a price on their biological greenhouse gas emissions (methane, nitrousoxide and CO2 from N fertiliser) from 2025. Erica provides context in a summary and webinar in partnership with ANZ.

We have over 60 consultants nationwide