<Li> Chaki taklla, a human - powered foot plough that consists of a wooden pole with a curved sharp point, often made of stone or metal . Across the end of this pole ran another wooden crossbar, on which the farmer could put his foot to sink it into the earth and produce a furrow . This tool is still used in the Andes for plowing, sowing, and building . </Li> <Li> Rawk'ana, a hoe with a thin sheet of wood of chachakuma, no higher than 40 cm . It was used to harvest tubers, to remove weeds and to sow small seeds . </Li> <Li> Waqtana, a Quechua term for a "clod buster" </Li> <P> The chaki taklla, rawk'ana, and waqtana were used by Andean farmers for thousands of years . </P>

What was a distinguishing feature of inca farming