NTTL: Only U.S. OECD Tractor Test Lab

The University of Nebraska Tractor Test Laboratory (NTTL) is the officially designated tractor testing station for the United States and tests tractors according to the Organization for Economic Co-operation and Development (OECD) codes OECD codes. Tractors are tested in the country of manufacture. Twenty-nine countries adhere to the tractor test codes (including non-OECD members:  China, India, the Russian Federation, and Serbia) with active tractor test stations in approximately 25 of those countries. Reciprocity agreements with the codes require that once an OECD test report is officially approved, it must be accepted by all participating countries.

NTTL employs 25-30 part-time student workers, most majoring in Agricultural Engineering or Mechanized Systems Management through UNL's Biological Systems Engineering Department. Many of these students are also members of the Quarter Scale Tractor Team, which competes in an annual event sponsored by the American Society of Agricultural and Biological Engineers.

Nebraska Tractor Test Lab group photo, Fall 2014


Nebraska Tractor Test Lab group photo, Fall 2013

NTTL group

Nebraska Tractor Test Lab group photo, including Dr. Hasan Silleli (under "Test").

NTTL Test Seasons

The Nebraska Tractor Test Laboratory seasons are spring and fall. The temperature outdoors must be between 40 and 80 for drawbar testing on the track. For the PTO testing on our dynamometer, we must target 73.5, in occordance with the requirement of the OECD Code 2 performance test.

test car The Nebraska Tractor Test Laboratory test car was built in 2002 by Caterpillar, Inc. and was used in the testing of 18 tractors during our past Spring test season and 19 tractors during the Fall test season, bringing our total to 2,053 tractors tested since 1920.


Larsen Museum

Built in 1919, to satisfy the needs of the Nebraska Tractor Law, our original building was designated as an historic site by the American Society of Agricultural Engineers. It now houses the Larsen Tractor Test & Power Museum.

LTM logo

Turkish Scholars Visit

The Nebraska Tractor Test Lab has recently hosted two visiting scholars from Turkey. Dr. Sarp Korkkut Sumer, of Canakkale Onsekiz Mart University, was our guest last summer. In his presentation to the NTTL Staff and BSE Department, he shared data about cotton production in Turkey and the mechanization of the Turkish fibers industry. Dr. Hasan Silleli, an Associate Professor in the Farm Machinery Department of Ankara University, was here during the fall semester. Dr. Silleli is becoming the chair of an OECD working committee that Dr. Roger Hoy, NTTL Director, previously held. Dr. Silleli shared his work on tractor roll-over protection systems, as well as on cooling/heating for greenhouses base in efficient energy use principles. He worked with NTTL staff and students, and professors in Biological Systems Engineering and Agronomy. (Dr. Silleli is pictured in the NTTL group photo.)

Profile of an NTTL Student Worker:  Sam Marx

 Sam Marx

Sam is a graduate student in Agricultural Engineering in the Biological Systems Engineering Department. His Bachelor’s degree is in Agricultural Engineering Technology from the University of Wisconsin-River Falls. After graduating in 2008, Sam joined the Peace Corp and went to Africa as a volunteer. He was assigned to Tanzania, where he helped established three tree nurseries in three small villages. He learned Swahili while there and began researching graduate schools. “The University of Nebraska’s name kept appearing,” said Sam, “and that’s how I ended up here.” He established residency by working as a precision ag consultant for a group of John Deere dealerships, and after moving to Lincoln, he continues to work for John Deere, in addition to working at NTTL and his graduate studies. Sam reports he also spent a semester abroad in 2006 where he studied under the German Ministry of Agriculture.





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