Forestry is a long-term crop with rotations of over 30 years for fast-growing conifers and up to 100 years for slower-growing broadleaf species. One of the big differences between agricultural enterprises and forestry is the relatively long time period involved in growing a forest to maturity.
Therefore when farmers are considering planting some land, they should consider the economic implications of the planting decision over the time frame of the (rotation) forest crop.
There are two types of income from planting a forest:
There are also two types of costs that are incurred on planting:
In general, dairy farmers have higher opportunity costs and are less likely to plant as the net gain will be low, while cattle and sheep farmers have lower opportunity costs, so they make a financial gain by replacing the agricultural income with higher income from forestry.
Short-term view
Farmers might be tempted to compare these farm system incomes against the 2015 forest premium. However, comparing the Family Farm Income (which includes market and subsidy income) in a given year to the forest premium payment (subsidy only) is a bit like comparing apples and oranges and making a decision on the basis of the figures that apply in one year only is taking a short-term view.
For a long-term land use change such as forestry, landowners should take into account the full range of factors that can affect the returns from forestry over the full rotation of the forest crop. For instance, the comparison above does not take costs and revenues (from harvesting timber) over the lifetime into account. These can be projected forward using forest growth (yield) models and average historic timber prices.
The return from both agriculture and forestry varies hugely depending on the soil type of the land, which determines productivity and income. Table 2 shows the relationship between agricultural soil classes. Soil class one is the best agricultural soil and soil class six is the poorest, while higher forest yield classes produce more timber and higher financial returns. In general terms, the better the soil, the shorter the rotation length.
Analysis undertaken by Teagasc for the Forest Service calculates the afforestation income resulting from the planting of one forest rotation of a conifer crop for each of the farm systems across the range of soil classes.
Assumptions:
Across the different forest rotations on the different soil classes, the long-term net return to forestry is strongly positive regardless of soil class. However, the highest net gain from planting occurs at soil code five/yield class 18 – land that’s marginal for agricultural production. This trend is largely consistent for all the farm systems.
One of the advantages of choosing forestry is that long-term timber prices have kept pace with inflation over time and unlike in the farming situation, it is possible to capitalise on high timber prices by harvesting a year or two earlier or later.
On the other hand, fluctuations in farm income over time affect annual farm incomes and the opportunity cost of planting. This is evident in Figure 1 where the poor average income of 2009 due to bad weather was half the income achieved due to high prices in 2011.
Taking the long-term view
This article is based on forest economic research recently undertaken by Mary Ryan, Cathal O’Donoghue and Anne Kinsella of the Teagasc Rural Economy and Development Programme.
[1]It should be noted that the agricultural and forest incomes presented here are pre-tax incomes and do not take into account the different treatment of agricultural and forest incomes as income from forest premiums and sales of timber are not liable for income tax.