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

Agronomic and environmental soil test phosphorus in manured and non-manured Manitoba soils

2007 ◽  
Vol 87 (1) ◽  
pp. 73-83 ◽  
Author(s):  
D. Kimaragamage ◽  
O O Akinremi ◽  
D. Flaten ◽  
J. Heard
Keyword(s):  
Iron Oxide ◽  
Surface Soil ◽  
Single Equation ◽  
Soil Samples ◽  
Soil Test ◽  
Regression Equations ◽  
Soil P ◽  
Soil Test Phosphorus ◽  
Bray 1 ◽  
Water Extractable

Quantitative relationships between soil test phosphorus (STP) methods are needed to guide P management especially in manured soils with high P. Our objectives were: (i) to compare amounts of P extracted by different methods; (ii) to develop and verify regression equations to convert results among methods; and (iii) to establish environmental P thresholds for different methods, in manured and non-manured soils of Manitoba. We analyzed 214 surface soil samples (0–15 cm), of which 51 had previous manure application. Agronomic STP methods were Olsen (O-P), Mehlich-3 (M3-P), Kelowna-1 (original; K1-P), Kelowna-2 (modified; K2-P), Kelowna-3 (modified; K3-P), Bray-1 (B1-P) and Miller and Axley (MA-P), while environmental STP methods were water extractable (W-P), Ca Cl2 extractable (Ca-P) and iron oxide impregnated filter paper (FeO-P) methods. The different methods extracted different amounts of P, but were linearly correlated. For an O-P range of 0–30 mg kg-1, relationships between O-P and other STP were similar for manured and nonmanured soils, but the relationships diverged at higher O-P levels, indicating that one STP cannot be reliably converted to another using a single equation for manured and non-manured soils at environmentally critical P levels (0–100 mg kg-1 O-P). Suggested environmental soil P threshold ranges, in mg P kg-1, were 88–118 for O-P, 138–184 for K1-P, 108–143 for K2-P, 103–137 for K3-P, 96–128 for B1-P, 84–111 for MA-P, 15–20 for W-P, 5–8 for Ca-P and 85–111 for FeO-P. Key words: Phosphorus, soil test phosphorus, manured soils, non-manured soils, environmental threshold

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.

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
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