Alexander, H. M., C. L. Cumings, L. Kahn and A. A. Snow. 2001. Seed size variation and predation of seeds produced by

wild and crop-wild sunflowers. American. J. Bot. 88, 623-627.

Anderson, T. W., and D. A. Darling. 1954. A test of goodness of fit. J. Am. Stat. Assoc. 49, 765–769.

Baldini, M., and G. Vannozzi. 1996. Crop management practice and environmental effects on hullability in sunflower hybrids.

Helia. 19, 47-62.

Baumler, E., C. A. Adela, S. M. Nolasco, and I. C. Riccobene. 2006. Moisture dependent physical and compression properties

of safflower seed .J. Food Eng. 72, 134–140.

Calisir, S., T. Marakoglu, H. Ogut, and O. Ozturk. 2005. Physical properties of rapeseed. J. Food Engin. 69, 61-66.

Eiman Mehr, E., B. Ghobadiyan, S. Minae and J. Fardmal. 2006. Determine Some physical properties of canola seed (Varietie’s

Lykurd). J. Agric. Engin Res. 29, 119-128. (In Farsi).

Faostat Food and Agricultural Organization of the United Nations, 2009. Statistics Division. ProdSTAT: crops (30 November

2009) based on 2003–2007 data. Available online: http://faostat.fao.org/site/567/default.aspxS.

Flagella, Z. T., E. Rotunno, D. Caterina, and A.De. Caro. 2002. Changes in seed yield and oil fatty acid composition of high

oleic sunflower (Helianthus annus L.) hybrids in relation to the sowing date and the water regime. Europ. J. Agron. 17: 221-230.

Flexas, J., J. Bota, F. Loreto, G. Cornic, and T. D. Sharkey. 2004. Diffusive and metabolic limitations to photosynthesis

under drought and salinity in C3 plants. Plant Biol. 6: 269-279.

Gupta, R. K., and S. K. Das. 1997. Physical properties of sunflower seeds. J. Agric. Eng. Res. 66: 1–8.

Irtawange, S. V. 2000. The effect of accession on some physical and engineering properties of African yam bean. Ph.D. Thesis,

Department of Agricultural Engineering, University of Ibadan, Nigeria.

Jain, R. K., and S. Bal. 1997. Properties of pearl millet. J. Agric. Eng. Res. 66: 85–91.

Lawlor, D.M. 2002. Limitation to photosynthesis in water-stressed leaves: stomata vs. metabolism and the role of ATP. Ann.

Bot. 89: 871-885.

Maduako, J. N., and M. O. Faborode. 1990. Some physical properties of cocoa pods in relation to primary processing. Ife J.

Technol. 2: 1–7.

Mohsenin, N. N. 1986. Physical Properties of Plant and Animal Materials. (2 Ed). Gordon and Breach Science Publishers,

New York.

Nel, A. A. 2001 a. Effect of water stress during grain filling on seed yield and quality. Chapter 7, University of Pretoria.

Nel, A. A. 2001 b. Relationship between seed quality and easily measurable seed characteristics. Chapter 8, University of

Pretoria.

Norman, L. J., K. Samoel, and N. Balakrishnan. 1985. Continuous Univariate Distributions, second ed. A Wiley-Interscience

Publication, New York, Chichester, Brishban, Toronto, Singapore.

Seiler, G. J. 1997. Anatomy and morphology of sunflower. In: A. A. Schneiter (Ed.), Sunflower Technology and Production.

PP. 67-111., Monograph No. 35. ASA, CSSA, SSSA, Madison, Wisconsin, U.S.A.

Tabatabaeefar, A. 2003. Moisture dependent physical properties of wheat. Int Agrophysics. 17: 207-211.

Weibull, W. 1951. A statistical distribution function of wide applicability. J. Appl. Mech. 18: 293–297