What does the presence of two sets of furrows in a ploughed field at Kalibangan suggest?

Multiple crop cultivation

The presence of grain finds provides evidence of agriculture in the Harappan civilization, although reconstructing the exact agricultural practices can be challenging. One question is whether seeds were scattered on ploughed lands. Representations on seals and terracotta sculptures indicate knowledge of bulls, suggesting that oxen were employed for ploughing. Additionally, terracotta models of ploughs discovered in Cholistan and Banawali support this notion.

Archaeologists have uncovered evidence of a ploughed field at Kalibangan, associated with Early Harappan levels. Notably, the field featured two sets of furrows intersecting at right angles, possibly indicating the simultaneous cultivation of different crops.