Row sowing: In this method, the seed is placed in rows, the row width being 40–80 cm. The seeds are placed at the bottom of the furrow in dry soils or at the top of the ridge in areas with abundant rain (Risi and Galwey, 1984). The mechanized system makes the furrows, carries out the distribution and tops off the seed simultaneously. Sowing in furrows
is frequently practised in Bolivia, where the furrows are opened up with the yoke or mechanical traction plough and after which the seed is distributed in a continuous stream (Rojas et al., 2004). In the Southern Altiplano, mechanical sowing is performed with the Satiri drill, which has two furrowers with chutes through which the seed is fed. The opening of the furrowers can be adjusted to a distance between 0.8 and 1 m, and the seed is deposited in the furrows, also at a distance of 0.8 to 1 m
(FAO, 2011)