@article{Martinez:256988,
      recid = {256988},
      author = {Martinez, G. A. and Olivieri, L. and Castro, J. A. and  Muniz-Torres, O. and Guzman, J. L.},
      title = {WATER CONTAMINANT POTENTIAL OF SOILS FROM THE POULTRY ZONE  IN PUERTO RICO},
      address = {1997-07-06},
      number = {1887-2017-804},
      pages = {8},
      year = {1997},
      abstract = {The Poultry Industry is the economic backbone of the  south-central region of Puerto Rico. However, as in other  poultry production regions, concern has risen regarding its  potentially damaging impact on the environment.  Eutrophication of rivers and lakes, induced by excessive  soil nutrient runoff, has forced regulatory agencies to  closely evaluate manure disposal practices. To ascertain  the impact of years of manure applications on the  nutritional status of soils, a number of samples from 9  farms of the poultry zone of Puerto Rico were evaluated.  The farms were selected among those with the highest bird  population and represent sites differing widely in  ecosystem composition. Available phosphorus (P) was  determined (Olsen method) in those samples. Sixty six  percent of the samples analyzed contained Ρ levels in  excess of what is considered adequate to support crop  growth. Measured levels ranged from undetectable values up  to 900 mg/Kg P. The Ρ index, was employed in an effort to  identify areas of concern. All farms studied had zones  where nutrient runoff could constitute a threat to the  quality of the surrounding water bodies.},
      url = {http://ageconsearch.umn.edu/record/256988},
      doi = {https://doi.org/10.22004/ag.econ.256988},
}