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Ammonium Pyrophosphate and Ammonium Orthophosphate as Phosphorus Sources: Effects of Soil Temperature, Placement, and Incubation
Author(s) -
Engelstad O. P.,
Allen S. E.
Publication year - 1971
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1971.03615995003500060040x
Subject(s) - incubation , ammonium , pyrophosphate , chemistry , incubation period , phosphorus , phosphate , sowing , environmental chemistry , agronomy , zoology , biochemistry , biology , organic chemistry , enzyme
Triammonium pyrophosphate [(NH 4 ) 3 HP 2 O 7 ] was found to be less effective than monoammonium orthophosphate [NH 4 H 2 PO 4 ] when both were freshly added as sources of P for corn ( Zea mays L.) grown in cool soil (16C). No difference in effectiveness was found between these sources when freshly applied to warm soil (24C). Incubation prior to planting reduced the effectiveness of both sources, particularly when the soil was warm during the incubation period.