Two companies have teamed up to spray water using drones – the smart method uses 10 litres of water per hectare, while tractors use 250. Corteva AgriScience and Brazilian company Arpac have jointly developed an efficient drone water spraying system. The new system is extremely promising, as the drone uses 10 litres of water per hectare using the spray method, compared to an average of 250 litres per hectare for a tractor.