Maximum flight altitude: 100 m (subject to local regulations, please check with your local dealer);
Longest control range: 2,000 m;
Maximum flight speed 10 m/s, maximum operating flight speed 10 m/s;
Hovering time: 18 min (@30,000 mAh, takeoff weight 50 kg), 7 min (@30,000 mAh, takeoff weight 90 kg), 6 min (@30,000 mAh, takeoff weight 101 kg)
(*The hovering time was measured close to sea level at a wind speed lower than 3 m/s and ambient temperature of 25°C, and is for reference only. The actual environment may differ from the testing environment. Please follow the actual measurement outcome.)

On average you can cover 21.33 hectares per hour.  This depends on the load carried, how much spray and how fast you move.

The spreading system usually covers up to around 7m

Yes it does, subject to slopes on the fields.