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A field with coffee and banana inter-cropped in Uganda |
By Caity Peterson
You're hungry for pizza. Walking around the neighborhood, you find
two pizzerias not far from each other. They're both selling pretty much
the same thing - crust with cheese and tomatoes on top - and at the same
price. But one offers you a free delicious ice-cold 2-liter soda to go
with your hawaiian. That makes your choice easy, no?
Believe it or not, something similar is happening in Uganda. Only
we're not talking about pizza, and the choice is a bit more complicated.
The comestibles in question here are two of the country's most
important agricultural commodities. One, coffee, makes up 20-30% of
Uganda's foreign exchange earnings and creates a cash boom for
smallholders once or twice a year. The other, banana, is the country's
principle staple crop, providing a small, steady food harvest all year
long. In fact, Uganda was the 2
nd largest banana producer in the world in 2008, and the 11
th largest coffee producer.
By happy coincidence, both of these crops tend to grow at around the
same altitude: from 800 to 2300 meters. Thus, considering growing human
populations and farmers increasingly squeezed for space, it makes sense
to grow them together, especially since coffee tends to produce more
consistently when grown with a little bit of shade. Many farmers in
Uganda are doing just that, intercropping banana and coffee to make good
use of space in densely populated areas. Others are sticking with the
old system or growing the two crops in separate plots, as used to be
promoted by colonial extension services solely concerned with profits
from the coffee cash crop and is often still promoted today, for
apparent lack of a better option.
But which of these systems is actually the most beneficial for
farmers? Until now, not much research has existed specifically targeting
the relative advantages and disadvantages of different types of coffee
growing systems. The result is that government agencies and other
advisory bodies have trouble knowing what to promote, and farmers are
even more in the dark.
Ongoing research by the International Institute for Tropical Agriculture (
IITA), Kampala, Uganda, in collaboration with other CGIAR centers (
CIAT,
ICRAF, and
CIFOR),
has attempted to evaluate the benefits of different types of systems,
including co-benefits for climate change adaptation and mitigation and
implications for pest and disease incidence.
They have found that banana-coffee intercrop systems have the
potential to be the most beneficial for farmers because they leave the
yield of the coffee crop virtually untouched, while providing a little
something extra in the form of more food for their personal use.
Essentially, by combining the two crops farmers are greatly increasing
the total yield value of a single plot of land, even if the yield for
individual crops doesn’t change much. Bananas are to coffee crops what
our free soda is to pizzerias – it doesn’t change the pizza, but it’s a
nice bonus nonetheless.
Furthermore, including bananas in the coffee system spreads the
farmers’ risk. If one crop fails or is decimated by a disease, they can
still get a harvest from the other. Ugandan farmers have reported that
the shade from the bananas also decreases their coffee’s susceptibility
to drought and extreme weather events due to climate change. The
residues from the trees provide
in-situ mulch which would otherwise cost
them much capital and labor to bring in. They say bananas also motivate
them to better manage their coffee crops during the first 3-5
unproductive years, because the bananas are producing even when the
coffee is not. This is especially true for the female half of the
community, which often doesn’t see the money from a coffee sale come
back to the household but can use the banana harvest for home
consumption.
There are trade-offs, of course. The intercrop system removes larger
quantities of nutrients from the soil, and, in the long-term, coffee can
eventually out-compete banana. The system can also require larger
inputs of labor and capital at the outset. Accordingly, the success of
intercrop systems will require identification of major production
constraints – principally soil fertility – and the development of
site-specific recommendations to address them.
Recently, the IITA team has been taking a more climate-centric focus
to their crop system analyses, collaborating on the development of
suitability maps for East African coffee crops, pests, and diseases and
investigating the mitigation potential of the coffee-banana intercrop
system. For more info on past and current IITA work in Uganda – and
parallel projects on cocoa systems in Cameroon and Nigeria – check out
the following resources:
See original story on CCAFs blog:
http://ccafs.cgiar.org/blog/uganda-coffee-and-banana-go-better-together