Yes, an Incan would have described this achievement as “clever” because he/she wouldn't have thought that such limited land would produce so many corns. The fact that only a small portion of the land could grow corns was hampering the food supply of the Incan people.
When irrigation channels were constructed on the demands of the king, land became more fertile and the production of corns increased rapidly. This was truly a clever achievement for the Incas who had limited fertile land to grow corns.
