000261633 001__ 261633
000261633 005__ 20170829234258.0
000261633 037__ $$a1976-2017-3560
000261633 041__ $$aeng
000261633 245__ $$aNUTRIENT UPTAKE BY FIVE INTENSIVELY MANAGED TROPICAL FOOD CROPS
000261633 260__ $$c1983
000261633 269__ $$a1983-09-11
000261633 300__ $$a17
000261633 336__ $$aConference Paper/ Presentation
000261633 520__ $$aThere 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.
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000261633 546__ $$aEnglish
000261633 650__ $$aCrop Production/Industries
000261633 650__ $$aResearch and Development/Tech Change/Emerging Technologies
000261633 700__ $$aIrizarry, Héber 
000261633 700__ $$aVicente-Chandler, José 
000261633 700__ $$aRivera, Edmundo 
000261633 8560_ $$fsnyde350@umn.edu
000261633 8564_ $$s623678$$uhttp://ageconsearch.umn.edu/record/261633/files/19-4.pdf
000261633 8564_ $$s1757378$$uhttp://ageconsearch.umn.edu/record/261633/files/19-4.pdf?subformat=pdfa$$xpdfa
000261633 909CO $$ooai:ageconsearch.umn.edu:261633$$qGLOBAL_SET
000261633 980__ $$a1976