Crop Dusting equipment (spraying nozzle) mounted on the underbelly an old Antonov An-2 spray plane (Bulgaria) . Tail number LZ-1102.
I found this old spray plane parked on an abandoned military air field north of Plovdiv. The abandoned airfield has since been converted into a car racing circuit Kaloyanovo.
This good old plane was later spotted in Agades (Niger) in 2007 where it was sadly involved in a ground mishap with another similar Antonov An-2 (AIST-2) that overturned in a Sandstorm... (the Antonov wasn't anchored). See photos here:
Баск - Bask Air AD ( baskair [at] abv.bg ) is a Bulgarian civil air company. It specializes in providing air emergency services, crop dusting and other aerial services. According to this website, the Company owns 4 Antonov An-2 planes, but now, 2 of them have been seriously damaged in Niger (see above).
This photo is part of my България - Bulgaria series.