Identify the correct rearrangement of the following sentences to make it a meaningful paragraph on 'Drone technology for crop surveillance to bring precision to farming. The introductory sentence No. 1 (S1) and the concluding sentence No. 6 (S6) have already been marked for you.

S1: The 'Flying Farmer' is designed to solve two major agricultural issues faced by farmers - pesticide treatment and weed detection.

(P) Secondly, human weed detection is inefficient and prone to error, leading to lower produce.

(Q) Drones, programmed with computer vision algorithms and infrared sensors can detect the exact position and nature of weeds and transmit information to the farmer for timely action.

(R) To deliver pesticides, pre-programmed drones can target specific farm areas and crops avoiding wastage and overuse of pesticides.

(S) With rising labour costs and shortage of labour, drone technology is hypothesized to replace human intervention in delivering pesticide treatment.

S6: The field trials conducted at LPU led to an improvement of 15-20% in produce quantity.