@article{hassan_silva_1999, title={Effect of planting date on first-year survival of two pines}, number={-30}, journal={Proceedings of the Tenth Biennial Southern Silvicultural Research Conference : Shreveport, Louisiana, February 16-18, 1999}, publisher={Asheville, NC : U.S. Dept. of Agriculture, Forest Service, Southern Research Station}, author={Hassan, A. E. and Silva, C.}, year={1999}, pages={344} }
 @article{hassan_roise_1998, title={Soil bulk density, soil strength, and regeneration of a bottomland hardwood site one year after harvest}, volume={41}, DOI={10.13031/2013.17273}, abstractNote={The first year soil physical properties and regeneration measurements following harvest indicate ample 
regeneration on all treatments including the landing areas. Comparisons included three machine systems (three skidders) 
and a helicopter-yarded control that were field tested for harvesting a bottomland hardwood site under adverse 
conditions. The results also demonstrate a significantly greater number of tree stem count following the winter than the 
summer harvest. Results of the statistical analysis of soil bulk density indicate that the soil had partially recovered from 
machine traffic one year after harvest.}, number={5}, journal={Transactions of the ASAE}, author={Hassan, A. E. and Roise, Joseph}, year={1998}, pages={1501–1508} }
 @article{hassan_tohmaz_1995, title={Performance of skidder tires in swamps: Comparison between statistical and neural network models}, volume={38}, DOI={10.13031/2013.27981}, abstractNote={Tractive performance of a rubber-tired skidder operating on soft organic soil in the Coastal Plain region of North Carolina was determined for three tire sizes inflated at each of three inflation pressures (69, 103, and 172 kPa). The tractive pull/dynamic load ratio values were low (= 0.32) for all tire size/inflation pressure combinations and, when plotted against the travel reduction, appeared to be dependent on the tire inflation pressure.}, number={5}, journal={Transactions of the ASAE}, author={Hassan, A. E. and Tohmaz, A. S.}, year={1995}, pages={1545} }
 @article{hassan_thomaz_roise_1992, title={Evaluation of Manual Sorting in Three Pine Nurseries}, volume={35}, DOI={10.13031/2013.28825}, abstractNote={Mechanization of nursery operation extends from seedbed preparation to seedling lifting. However, sorting and grading are still labor intensive. Three nurseries in the Southeast with varying degrees of sophistication in sorting and grading of pine seedlings were investigated. Samples of plantable and rejected seedlings were collected and analyzed to determine the nursery shed performance. A vision system was utilized for seedling measurements and the results were analyzed using ANOVA analysis. The nursery with no sorting capabilities was the most efficient, indicating that cultural practices might be an alternative to sorting. The percentage of rejects in the plantable samples was low for the nurseries with manual labor indicating the high training for sorting, however, the percentage of plantables in the reject samples was high, indicating possible waste of good nursery seedlings.}, number={6}, journal={Transactions of the ASAE}, author={Hassan, A.E. and Thomaz, A.S. and Roise, J.P.}, year={1992}, pages={1981} }
 @article{hassan_tohmaz_roise_1991, title={Evaluation of manual sorting in three pine nurseries}, number={91-7506}, journal={Paper (American Society of Agricultural Engineers)}, author={Hassan, A. E. and Tohmaz, A. S. and Roise, J. P.}, year={1991}, pages={16} }