@article{harrelson_hoyt_havlin_monks_2008, title={Effect of planting date and nitrogen fertilization rates on no-till pumpkins}, volume={43}, number={3}, journal={HortScience}, author={Harrelson, E. R. and Hoyt, G. D. and Havlin, J. L. and Monks, D. W.}, year={2008}, pages={857–861} }
 @article{harrelson_hoyt_havlin_monks_2007, title={Effect of winter cover crop residue on no-till pumpkin yield}, volume={42}, number={7}, journal={HortScience}, author={Harrelson, E. R. and Hoyt, G. A. and Havlin, J. L. and Monks, D. W.}, year={2007}, pages={1568–1574} }