EVALUATION AND CALIBRATION OF PHOSPHORUS SOIL TEST METHODS FOR PREDICTING FERTILIZER REQUIREMENTS OF POTATOES

1957 ◽  
Vol 37 (2) ◽  
pp. 134-142 ◽  
Author(s):  
J. A. Smith ◽  
R. W. Sheard
Keyword(s):  
Soil Phosphorus ◽  
Test Methods ◽  
Soil Test ◽  
Phosphorus Fertilizer ◽  
Southern Ontario ◽  
Phosphorus Response ◽  
Soluble Phosphorus ◽  
Phosphorus Requirement ◽  
Fertilizer Rates

According to concepts and techniques developed by Bray, ten extracting procedures for soil phosphorus were compared and evaluated against phosphorus response collected from field potato trials conducted in various potato-growing areas of Southern Ontario over three years.A modification of the PA2 test, developed by Bray and his associates for the extraction of adsorbed + acid-soluble phosphorus, was chosen as most nearly fulfilling the requirements of a successful soil test under the conditions of this experiment.The soil test was calibrated against response to phosphorus fertilizer rates resulting in a phosphorus requirement table for potatoes.

scholarly journals Interlaboratory comparison of soil phosphorus extracted by various soil test methods

2001 ◽  
Vol 32 (15-16) ◽  
pp. 2325-2345 ◽  
Author(s):  
Peter J. A. Kleinman ◽  
A. N. Sharpley ◽  
K. Gartley ◽  
W. M. Jarrell ◽  
S. Kuo ◽  
...  
Keyword(s):  
Interlaboratory Comparison ◽  
Soil Phosphorus ◽  
Test Methods ◽  
Soil Test

EFFECT OF SOIL ORDER, pH, TEXTURE AND ORGANIC MATTER ON THE CORRELATION BETWEEN PHOSPHORUS IN ALFALFA AND SOIL-TEST VALUES

1967 ◽  
Vol 47 (3) ◽  
pp. 157-161 ◽  
Author(s):  
M. K. John ◽  
A. L. van Ryswyk ◽  
J. L. Mason
Keyword(s):  
Soil Ph ◽  
Soil Phosphorus ◽  
Test Methods ◽  
Test Method ◽  
Available Phosphorus ◽  
Soil Test ◽  
Tissue Samples ◽  
Podzolic Soils ◽  
Wide Range ◽  
The Relationship

Soil and tissue samples were collected from 192 alfalfa fields representing a wide variety of cultivated soils in British Columbia. The phosphorus content of the alfalfa was correlated with the amounts of available P extracted by eight soil-test methods. The Olsen method, Bray's P1 method, and a modification of Bray's P1 method showed high correlation with plant phosphorus over a wide range of soils; the other five methods showed lower correlation. The relationship observed between soil phosphorus and plant phosphorus differed with soil pH and soil order for the various available-phosphorus methods used. None of the methods gave significant correlations with the Solonetzic and Podzolic soils. Multiple correlation studies indicated that soil pH and texture were required to explain the contribution of available phosphorus in soil, as measured by any soil-test method, to phosphorus in alfalfa.

Comparison Of Three Soil Test Methods For Estimating Plant-available Silicon

2003 ◽  
Vol 34 (15-16) ◽  
pp. 2059-2071 ◽  
Author(s):  
Luciana de Lima Rodrigues ◽  
Samira H. Daroub ◽  
Ron W. Rice ◽  
George H. Snyder
Keyword(s):  
Test Methods ◽  
Soil Test
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