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Effect of Seaweed on the Levels of Available Phosphorus and Nitrogen in a Calcareous Soil 1
Author(s) -
Caiozzi Mario,
Peirano Pedro,
Rauch Eduardo,
Zunino Hugo
Publication year - 1968
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1968.00021962006000030024x
Subject(s) - calcareous , phosphorus , nitrogen , algae , phosphate , ammonium , nitrate , calcareous soils , chemistry , agronomy , environmental chemistry , soil water , zoology , botany , ecology , biology , organic chemistry
The objective of the present investigation was to study changes in levels of phosphorus and nitrogen in soils supplemented with dry, ground seaweed, KNO 3 , and KH 2 PO 4 After intervals of 21, 42, 76, and 105 days, phosphorus, nitrate, and ammonium were determined. The results showed that the seaweed affected the status of total inorganic N and P in the soil In all systems the levels of available inorganic phosphorus increased. However, part of the N that was added as nitrate or that was originally present in the soil was immobilized. The results further indicated that inorganic P of seaweed origin was probably in a form other than simple phosphate.