@article{Fox_Badillo_del Valle_Scott_1976, title={Response of Corn to Phosphorus Fertilization in Greenhouse, Sunken Drums and Field Experiments}, volume={60}, url={https://revistas.upr.edu/index.php/jaupr/article/view/10588}, DOI={10.46429/jaupr.v60i1.10588}, abstractNote={An experiment was conducted to determine if the P fertilizer response of corn planted in sunken bottomless drums was comparable to that in the field. Subsoil and surface of an Ultisol (Orthoxic Palehumults) soil low in available P were placed in sunken drums and planted to corn with and without added P. P response experiments also were carried out with the same soil in the field and in pots in the greenhouse. There was a significant yield and P uptake response to added P in the drum and pot experiments but not in the field, indicating that neither sunken drum experiments nor greenhouse pot tests substitute for field tests in determining response to P by corn.}, number={1}, journal={The Journal of Agriculture of the University of Puerto Rico}, author={Fox, R. H. and Badillo, J. and del Valle, R. and Scott, T. W.}, year={1976}, month={Jan.}, pages={88–92} }