Field Evaluation of a Tractor Operated Trailed type Boom Sprayer

A tractor operated trailed type boom prayer was selected to evaluate its performance under local agro-climatic conditions. The sprayer was operated in the cotton field at three forward speeds (2.5, 3.5 and 4 km/h) and at five fluid flow pressures (3.5, 4.0, 5.0, 6.0 and 7.0 kg/cm2) for its performance evaluation. The volume median diameter (VMD) were in the range of 300–452 μm. Smaller size droplets were obtained at higher pressure. The droplet density on leaves varied from 26 to 177 drops/cm2. Area covered by droplet spots on upper side of the top leaves, middle leaves and bottom leaves varied from 14.18 to 24.70 mm2/cm2, 11.01 to 23.07 mm2/cm2 and 8.74 to 17.22 mm2/cm2 respectively. Volume of spray deposition on upper side of the top leaves, middle leaves and bottom leaves varied from 330.19 to 677.87 × 10−6 cc/cm2, 293.27 to 633.99 × 10−6 cc/cm2 and 202.71 to 685.57 × 10−6 cc/cm2 respectively. Field capacity of the sprayer was 4.23 ha/h at the forward speed of 4.0 km/h and the average fuel consumption was 4.88 l/h.