1- Alimardani, R. 2002. Tractor-Implement System. Agriculture Science Pub. Tehran. Iran. (In Farsi)
2- Al-Jalil, H. F., Khadrir, A., Mukahal, W. 2001. Design and performance of an adjustable three-point hitch dynamometer. Soil &Tillage Res. 62, 153-156.
3- Anon. 1998. Agricultural machinery management data. ASAE Standard. 45th Ed. D497. 4, ASAE. St. Joseph. Michigan. WWW.asae.org
4- Anon. 2000. Instrumentation manual - CR10X measurement and control
module. Campbell Scientific Inc. Campbell Park. 80 Hathern Road. Shepshed. Loughborough. LE12 9GX. UK.
module. Campbell Scientific Inc. Campbell Park. 80 Hathern Road. Shepshed. Loughborough. LE12 9GX. UK.
5- Anon. 2003. Characteristics and Gauide to strain gauges. Elhamsaz Co. Tehran. Africa Blvd. Shahroukh Vally. # 8. (In Farsi)
6- Clyde, A. W. 1995. Drawbar dynamometer using strain gauges. J. of Agric. Eng. Res. 36, 521-522, 529.
7- Fazel Niari, Z. 2002. Developing design and construction of three point hitch dynamometer. M. Sc. Thesis. Faculty of Agriculture. Theran University. Karaj. Iran. (In Farsi)
8- Godwin, R. J., Reynolds, A. J. 1993. A triaxial dynamometer for force and moment measurements on tillage implements. J. of Agric. Eng. Res. 55,
189-205.
189-205.
9- Lal, R. 1959. Measurement of force on mounted implements. Trans. of the ASAE. 1, 109-112.
10- Palmer, A. L. 1992. Development of a three-point linkage dynamometer for tillage research. J. of Agric. Eng. Res. 52, 151-167.
11- Schultz, B. C. 1996. A three points linkage dynamometer for restrained linkages. J. of Agric. Eng. Res. 11, 33-37.
12- Shafeii, A. 1990, Tillage machines. University Center Pub. Tehran. Iran. (In Farsi)