| |
| Web URL(s): | https://dl.sciencesocieties.org/publications/jeq/pdfs/20/3/JEQ0200030596
Last checked: 12/12/2016
Requires: PDF Reader
Notes: Item is within a limited-access website |
|---|
| Publication Type:
| Refereed |
|---|
| Author(s): | Korentajer, L.;
Henry, P. C.;
Eisenberg, B. E. |
|---|
| Author Affiliation: | L. Korentajer and P.C. Henry, Soil and Irrigation Research Institute, P/Bag X-79, Pretoria 0001, S. Africa; and B.E. Eisenberg, Dep. of Agriculture Dev., P/Bag X640, Pretoria 0001, S. Africa |
|---|
| Title: | A simple effects analysis of the effects of phosphogypsum application on phosphorus transport to runoff water and eroded soil sediments |
|---|
| Source: | Journal of Environmental Quality. Vol. 20, No. 3, July-September 1991, p. 596-603. |
|---|
| Publishing Information: | Madison, Wisconsin: American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America |
|---|
| Keywords: | TIC Keywords: Phosphorus; Contamination; Water pollution; Algae; Soil pollution; Water quality
|
|---|
| Abstract/Contents: | "Phosphorous contamination of surface waters as a result of land application of phosphogypsum (PG-a soil amendment containing orthophosphate-P) has not yet been investigated. A laboratory rainfall simulator study was conducted to assess the initial and residual effects of PG application on P transport to runoff water and eroded soil sediments. The experiment was carried out using three soils of various dispersivity and four rates of PG application (0, 2, 5 and 10 Mg/ha, in three replicates). Simulated rainfall was applied during three consecutive wet-dry cycles consisting of a 1-h rainfall event followed by a 4- to 6-d drying period. A split-plot design was used, consisting of soils and rates of PG application as the main plot treatments, and the storm as the split-plot treatment. A simple effects analysis was used to interpret the interactive effects between storms, PG rate, and soils. The beneficial effects of PG in reducing the amounts of runoff and sediment yield depended on the soil dispersivity. In a highly dispersive soil the positive effect was apparent at the lower rates of application(<5 Mg/ha) and gradually leveled off at the higher application rates. Conversely, on a soil with low dispersivity the beneficial effect of PG was obtained only at the higher rates of application (>5 Mg/ha). Differences in response to the PG application were explained in terms of the complementary effects of PG on chemical dispersion and mulching. The effects of PG decreased in subsequent storms indicating a progressive removal of PG from the soil surface by runoff and downward percolation. The orthophosphate-P concentrations in the runoff were generally much greater than 0.025mg/L, which is considered as the threshold concentration limiting algae proliferation in surface waters. Phosphorus removal by runoff and erosion gradually decreased in subsequent storms. The data indicated that P exports were determined by the combined effect of PG rate on the amounts of labile P available for transport, and its effects on the amounts of runoff and sediment yield. The results of the study suggest that application of high PG rates may result in P being exported to the waterways adjacent to the site of application and hence it may contribute to the enhanced eutrophication of the waterways." |
|---|
| Language: | English |
|---|
| References: | 33 |
|---|
| Note: | Tables
Graphs |
|---|
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Korentajer, L., P. C. Henry, and B. E. Eisenberg. 1991. A simple effects analysis of the effects of phosphogypsum application on phosphorus transport to runoff water and eroded soil sediments. J. Environ. Qual. 20(3):p. 596-603. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=21434 |
| If there are problems with this record, send us feedback about record 21434. |
| Choices for finding the above item: |
|---|
| Web URL(s):
https://dl.sciencesocieties.org/publications/jeq/pdfs/20/3/JEQ0200030596
Last checked: 12/12/2016
Requires: PDF Reader
Notes: Item is within a limited-access website |
| 
MSU catalog number: S 900 .J6 |
| Find from within TIC:
Digitally in TIC by record number. |
| Request through your local library's inter-library loan service (bring or send a copy of this TGIF record) |
