Premium
Field and Growth‐Chamber Evaluations of Potassium Polyphosphate
Author(s) -
Armbruster J. A.,
Murphy L. S.,
Meyer L. J.,
Gallagher P. J.,
Whitney D. A.
Publication year - 1975
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/sssaj1975.03615995003900010037x
Subject(s) - sorghum , agronomy , ammonium polyphosphate , potassium , seedling , dry matter , ammonium , polyphosphate , crop , sorghum bicolor , chemistry , biology , phosphate , raw material , organic chemistry
Results of field and growth chamber investigations indicate that potassium polyphosphate (KPP) is as effective as ammonium orthophosphate (AOP), ammonium polyphosphate (APP), and triple superphosphate (TSP) as a P source for corn ( Zea mays L.) and grain sorghum ( Sorghum bicolor L.). At one field site, on a soil high in total Fe, low P availability early in the growing season from both KPP and APP limited crop response. Field investigations of banded applications of KPP and AOP in direct contact with wheat ( Triticum aestivum L.) and grain sorphum seed had little effect on seedling emergence. In a growth chamber, however, a high P rate as banded AOP retarded dry‐matter yield of grain sorghum. Application of large amounts of P as KPP, AOP, APP and TSP to corn in the presence of low available Zn significantly reduced Zn concentrations in the plants but there was no significant difference in the effects of the various P carriers.