@article{gill_kasuo_kamprath_1991, title={Response of upland crops to potassium and lime applications in West Sumatra}, volume={6}, number={2}, journal={Potash Review}, author={Gill, D. W. and Kasuo, A. and Kamprath, E. J.}, year={1991}, pages={9} }
 @article{gill_kamprath_1990, title={POTASSIUM UPTAKE AND RECOVERY BY AN UPLAND RICE-SOYBEAN ROTATION ON AN OXISOL}, volume={82}, ISSN={["0002-1962"]}, DOI={10.2134/agronj1990.00021962008200020031x}, abstractNote={Abstract}, number={2}, journal={AGRONOMY JOURNAL}, author={GILL, DW and KAMPRATH, EJ}, year={1990}, pages={329–333} }