Preparation of iron oxide-impregnated filter paper for use in the Pi test for soil phosphorus

1993 ◽  
Vol 151 (1) ◽  
pp. 143-146 ◽  
Author(s):  
R. G. V. Bramley ◽  
S. P. Roe
Keyword(s):  
Iron Oxide ◽  
Filter Paper ◽  
Soil Phosphorus

Anion-exchange resins and iron oxide-impregnated filter paper as plant available phosphorus indicators in soils

2002 ◽  
Vol 33 (7-8) ◽  
pp. 1119-1130 ◽  
Author(s):  
C. A. Bissani ◽  
M. J. Tedesco ◽  
F. A. de O. Camargo ◽  
G. L. Miola ◽  
C. Gianello
Keyword(s):  
Iron Oxide ◽  
Anion Exchange ◽  
Filter Paper ◽  
Available Phosphorus ◽  
Anion Exchange Resins ◽  
Exchange Resins

scholarly journals Phosphorus collectors from filter paper and synthetic cloth coated with iron or aluminium oxide to provide phosphorus by diffusion in soils

2000 ◽  
Vol 43 (2) ◽  
pp. 173-179
Author(s):  
Eduardo Bernardi Luchese ◽  
Ervim Lenzi ◽  
Luzia Otília Bortotti Favero ◽  
Luceide Heloisa Loubak
Keyword(s):  
Iron Oxide ◽  
Filter Paper ◽  
Aluminium Oxide ◽  
Lining Material ◽  
Red Latosol

Phosphorus collectors made from filter paper and synthetic cloth, were tested to evaluate their feasibility of determining the need for phosphate application. The collectors were coated with two types of oxides, iron oxide and aluminium oxide. The capacity of the collectors was tested by placing them in a 2 mL of solution containing phosphorus (PO4(3-)) in the concentration of 0.0, 1.00, 3.00, 5.00, 7.00, 9.00 and 11.00 µ g.mL-1, respectively, after which they were placed in contact with four types of soil (LBa, LRd, LEd and Ca) and incubed for 0.0 and 24 h. In this test the soils were kept at a humidity equivalent to 150 mmHg suction. The amount of phosphorus extracted from the solutions was tested at intervals between 0,0 and 11.0 µ g of phosphorus/mL. Results indicated that collectors were most efficient in Dystrophic Dark-Red Latosol (LEd) and less efficient in "Bruno álico" Latosol (LBa) and Cambisol (Ca). Synthetic cloth was the support yielding the best performance, whereas iron oxide lining was the most adequate lining material. Phosphorus collection increased with time of incubation.

Sorption of phosphorus by the iron oxide-impregnated filter paper (Pi soil test) embedded in soils

1990 ◽  
Vol 126 (2) ◽  
pp. 287-294 ◽  
Author(s):  
R. G. Menon ◽  
S. H. Chien ◽  
L. L. Hammond ◽  
B. R. Arora
Keyword(s):  
Iron Oxide ◽  
Filter Paper ◽  
Soil Test ◽  
Pi Soil Test
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