Characterizing the rate of reaction of some argentinian soils with phosphate

R. E. Mendoza, N. J. Barrow

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

We incubated samples of five unfertilized Argentinian soils with phosphate at 4, 25, 40, and 60°C and measured the change in the null-point phosphate concentration through time. There was an initial decrease in this phosphate concentration, but, in some cases, it was followed by an increase in concentration. The increases were most marked after long periods or high temperatures and especially at low levels of added phosphate. The increases in concentration appeared to be due to release of phosphate already present in the soil. The amount released increased with both time and temperature of incubation. Functions to describe this release were included in equations to describe the continuing reaction between added phosphate and the soil. This produced a close description of the changes in concentration through time. We argue that it is consistent with mechanistic models of phosphate reaction with soils to subdivide phosphate added at different times into separate “pulses.” The net outcome is then the algebraic sum of the trend for each “pulse.”.

Original languageEnglish
Pages (from-to)105-112
Number of pages8
JournalSoil Science
Volume143
Issue number2
DOIs
Publication statusPublished - 1 Jan 1987
Externally publishedYes

Fingerprint

phosphate
phosphates
soil
rate
mechanistic models
temperature
incubation
sampling

Cite this

@article{8ba9cb9068d94e43bf2947b90c2bee1c,
title = "Characterizing the rate of reaction of some argentinian soils with phosphate",
abstract = "We incubated samples of five unfertilized Argentinian soils with phosphate at 4, 25, 40, and 60°C and measured the change in the null-point phosphate concentration through time. There was an initial decrease in this phosphate concentration, but, in some cases, it was followed by an increase in concentration. The increases were most marked after long periods or high temperatures and especially at low levels of added phosphate. The increases in concentration appeared to be due to release of phosphate already present in the soil. The amount released increased with both time and temperature of incubation. Functions to describe this release were included in equations to describe the continuing reaction between added phosphate and the soil. This produced a close description of the changes in concentration through time. We argue that it is consistent with mechanistic models of phosphate reaction with soils to subdivide phosphate added at different times into separate “pulses.” The net outcome is then the algebraic sum of the trend for each “pulse.”.",
author = "Mendoza, {R. E.} and Barrow, {N. J.}",
year = "1987",
month = "1",
day = "1",
doi = "10.1097/00010694-198702000-00004",
language = "English",
volume = "143",
pages = "105--112",
journal = "Soil Science",
issn = "0038-075X",
publisher = "Lippincott Williams & Wilkins",
number = "2",

}

Characterizing the rate of reaction of some argentinian soils with phosphate. / Mendoza, R. E.; Barrow, N. J.

In: Soil Science, Vol. 143, No. 2, 01.01.1987, p. 105-112.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Characterizing the rate of reaction of some argentinian soils with phosphate

AU - Mendoza, R. E.

AU - Barrow, N. J.

PY - 1987/1/1

Y1 - 1987/1/1

N2 - We incubated samples of five unfertilized Argentinian soils with phosphate at 4, 25, 40, and 60°C and measured the change in the null-point phosphate concentration through time. There was an initial decrease in this phosphate concentration, but, in some cases, it was followed by an increase in concentration. The increases were most marked after long periods or high temperatures and especially at low levels of added phosphate. The increases in concentration appeared to be due to release of phosphate already present in the soil. The amount released increased with both time and temperature of incubation. Functions to describe this release were included in equations to describe the continuing reaction between added phosphate and the soil. This produced a close description of the changes in concentration through time. We argue that it is consistent with mechanistic models of phosphate reaction with soils to subdivide phosphate added at different times into separate “pulses.” The net outcome is then the algebraic sum of the trend for each “pulse.”.

AB - We incubated samples of five unfertilized Argentinian soils with phosphate at 4, 25, 40, and 60°C and measured the change in the null-point phosphate concentration through time. There was an initial decrease in this phosphate concentration, but, in some cases, it was followed by an increase in concentration. The increases were most marked after long periods or high temperatures and especially at low levels of added phosphate. The increases in concentration appeared to be due to release of phosphate already present in the soil. The amount released increased with both time and temperature of incubation. Functions to describe this release were included in equations to describe the continuing reaction between added phosphate and the soil. This produced a close description of the changes in concentration through time. We argue that it is consistent with mechanistic models of phosphate reaction with soils to subdivide phosphate added at different times into separate “pulses.” The net outcome is then the algebraic sum of the trend for each “pulse.”.

UR - http://www.scopus.com/inward/record.url?scp=0000972311&partnerID=8YFLogxK

U2 - 10.1097/00010694-198702000-00004

DO - 10.1097/00010694-198702000-00004

M3 - Article

VL - 143

SP - 105

EP - 112

JO - Soil Science

JF - Soil Science

SN - 0038-075X

IS - 2

ER -