I´m from Peru and...
Aahaa. A clue. Your original post did not give enough information for anybody to work with.
As far as 'type' of chicken, you probably don't have easy access to the many breeds that our local hatcheries offer.
Since you didn't get specific about them, I assume you will want something that will
* Provide some meat
* Provide some eggs
* Get rid of some weeds
* Get rid of some bugs
* etc.
In your case, I don't believe breed matters. Find a local farmer that has some extra chicks. They're most likely a mixture of every breed that has been in the region for decades. They are probably better for you than a fancy breed. They are used to the climate, diseases, forages and insects. For your purposes, they will probably far exceed what a fancy (and expen$ive) breed will do for you. What the local farmers have is probably just what you need.
Chickens can do a lot of good in an orchard (UNLESS the trees are just small seedlings). They are cheaper than péones, and as a side benefit, provide you with breakfast, once, and a good caldo.
Buena suerte.