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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