The relationships between aerodynamic properties such as vacuum pressure and suction speed and the fiber and physiomechanical properties of cotton during harvesting were determined by using the Nazilli 84 cotton variety. Aerodynamic properties such as vacuum pressure and suction speed and physio-mechanical properties such as wet and dry lock masses. | Turk J Agric For 26 (2002) 363-368 © TÜB‹TAK Determination of Relationships between Various Aerodynamics, Physio-Mechanical and Fiber Properties in Cotton Mustafa Bülent COfiKUN Department of Agricultural Machinery, Faculty of Agriculture, Adnan Menderes University, Ayd›n - TURKEY Received: Abstract: The relationships between aerodynamic properties such as vacuum pressure and suction speed and the fiber and physiomechanical properties of cotton during harvesting were determined by using the Nazilli 84 cotton variety. Aerodynamic properties such as vacuum pressure and suction speed and physio-mechanical properties such as wet and dry lock masses, lock moisture, number of seeds per lock, carpel openness, carpel depth, carpel angle and force of lock break-off were measured. In addition fiber length, fiber strength, fiber elongation and fiber fineness were determined. The statistical relationships between the aerodynamic, physio-mechanical and fiber properties were also determined. It was observed that as suction speed increased the vacuum pressure requirement decreased. Moreover, a higher vacuum pressure was required for breaking off locks with seeds greater in number, with a large mass, and long, durable, flexible and thick fibers. Cotton locks showing high resistance to break off and moist cotton locks require a higher speed to be separated from the carpel. Key Words: Cotton, physio-mechanical properties, fiber properties, aerodynamic properties Pamu¤un Aerodinamik, Fiziko-Mekanik ve Lif Özellikleri Aras›ndaki ‹liflkilerin Belirlenmesi Özet: Bu çal›flmada, pamuk hasad›nda yararlan›labilecek vakum bas›nc› ve emme h›z› gibi aerodinamik özellikler ile pamu¤un lif ve fiziko-mekanik özellikleri aras›ndaki iliflkiler belirlenmeye çal›fl›lm›flt›r. Bu amaçla oluflturulan deneme düzene¤inde Nazilli 84 pamuk çeflidi denemeye al›nm›flt›r. Denemelerde vakum bas›nc› ve emme h›z› gibi aerodinamik özellikler ile yafl ve kuru lüle kütleleri, lüle nemi, lüledeki tohum
