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אסיף מאגר המחקר החקלאי
פותח על ידי קלירמאש פתרונות בע"מ -
Field studies on effect of soil conditioners and mulch on runoff from kaolinitic and lllitic soils
Year:
1991
Authors :
ון דר מרווה, א'
;
.
Volume :
29
Co-Authors:
Stern, R., Soil and Irrigation Research Inst, P/Bag X79, Pretoria, 0001, South Africa
Laker, M.C., Dept. of Soil Sci. and Plant Nutrition, Univ. of Pretoria, Pretoria, 0002, South Africa
Van Der Merwe, A.J., Soil and Irrigation Research Inst, P/Bag X79, Pretoria, 0001, South Africa
Facilitators :
From page:
249
To page:
261
(
Total pages:
13
)
Abstract:
Runoff plots (1.5 m2) were constructed at three sites where crusting, runoff and erosion are severe problems. The effect of surface application of phosphogypsum (PG), polyacrylamide (PAM) and mulch cover on runoff during natural rainstorms were studied. Runoff percentage from control (bare) plots in some rainstorms exceeded 90% of the rainfall. The annual runoff from control plots ranged between 33 and 73% of the annual rain. Mulch was highly beneficial in reducing runoff, indicating that seal formation restricted water penetration rather than hydraulic properties of the profile. PG reduced runoff to 0.15-0.82 of the untreated plots. The efficiency of PG in reducing runoff was inversely correlated with rainstorm intensity. The beneficial effect of PG in reducing runoff lasted throughout the rainy season. Its beneficial effect terminated during the consecutive season in the Irene site when the cumulative rain depth exceeded 700 mm. PAM treatment reduced annual runoff by two to three fold in comparison with the control treatment. The effect of PAM on diminishing runoff in the rainfall simulator studies was more pronounced than in the field conditions. © 1991, CSIRO. All rights reserved.
Note:
Related Files :
illitic soil
Infiltration
kaolinitic soil
mulch
rain simulator
runoff
Surface sealing
עוד תגיות
תוכן קשור
More details
DOI :
10.1071/SR9910249
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
25410
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:14
Scientific Publication
Field studies on effect of soil conditioners and mulch on runoff from kaolinitic and lllitic soils
29
Stern, R., Soil and Irrigation Research Inst, P/Bag X79, Pretoria, 0001, South Africa
Laker, M.C., Dept. of Soil Sci. and Plant Nutrition, Univ. of Pretoria, Pretoria, 0002, South Africa
Van Der Merwe, A.J., Soil and Irrigation Research Inst, P/Bag X79, Pretoria, 0001, South Africa
Field studies on effect of soil conditioners and mulch on runoff from kaolinitic and lllitic soils
Runoff plots (1.5 m2) were constructed at three sites where crusting, runoff and erosion are severe problems. The effect of surface application of phosphogypsum (PG), polyacrylamide (PAM) and mulch cover on runoff during natural rainstorms were studied. Runoff percentage from control (bare) plots in some rainstorms exceeded 90% of the rainfall. The annual runoff from control plots ranged between 33 and 73% of the annual rain. Mulch was highly beneficial in reducing runoff, indicating that seal formation restricted water penetration rather than hydraulic properties of the profile. PG reduced runoff to 0.15-0.82 of the untreated plots. The efficiency of PG in reducing runoff was inversely correlated with rainstorm intensity. The beneficial effect of PG in reducing runoff lasted throughout the rainy season. Its beneficial effect terminated during the consecutive season in the Irene site when the cumulative rain depth exceeded 700 mm. PAM treatment reduced annual runoff by two to three fold in comparison with the control treatment. The effect of PAM on diminishing runoff in the rainfall simulator studies was more pronounced than in the field conditions. © 1991, CSIRO. All rights reserved.
Scientific Publication
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