@article{Irizarry:261633,
      recid = {261633},
      author = {Irizarry, Héber  and Vicente-Chandler, José  and Rivera,  Edmundo },
      title = {NUTRIENT UPTAKE BY FIVE INTENSIVELY MANAGED TROPICAL FOOD  CROPS},
      address = {1983-09-11},
      number = {1976-2017-3560},
      pages = {17},
      year = {1983},
      abstract = {There is little information available on the uptake of  nutrients by well managed tropical food crops, particularly  as related to stage of growth. The present studies were  carried out to provide this information which is important  as a basis for the fertilization of five important food  crops of the tropics. Entire plants of these crops growing  at adequate levels of fertility were dug up at intervals  over an entire cropping season, divided into leaves, stems,  fruits and roots, dried, weighed and analyzed for N, P, K,  Ca and Mg. With intensive management, taniers (Xanthosoma  spp.), cassava (Manihot esculenta), pigeon peas (Cajanus  cajan), plantains (Musa acuminata χ M. balbisiana), and  yams (Dioscorea rotundata) under humid tropical conditions  yielded 4.2, 10.5, 2, 8.0 and 51.6 metric tons/ha of edible  dry matter, respectively. Maximum uptake of nutrients in  kg/ha by the crops were: Taniers = Ν - 125, Ρ - 15, Κ -  156, Ca - 25; Cassava = Ν - 204, Ρ - 12, Κ - 222, Mg - 33,  Ca - 86; Pigeon peas = Ν - 216, Ρ - 12, Κ - 168, Mg - 19,  Ca - 54; Plantains = Ν - 275, Ρ - 24, Κ - 569, Mg - 48, Ca  - 136 and Yams = Ν - 190, Ρ - 25, Κ - 215, Mg - 90, Ca -  35. Edible dry matter produced per kg of NPK used by the  plant was 11.9, 24.0, 14.2, 9.2 and 5.1 for yams, cassava,  taniers, plantains, and pigeon peas, respectively.},
      url = {http://ageconsearch.umn.edu/record/261633},
      doi = {https://doi.org/10.22004/ag.econ.261633},
}