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Soil physical properties and their i...

Golabi, Mohammad Hossein.

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Soil physical properties and their influence on water infiltration and water and solute movement under no-tillage management.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Soil physical properties and their influence on water infiltration and water and solute movement under no-tillage management./
作者:	Golabi, Mohammad Hossein.
面頁冊數:	114 p.
附註:	Source: Dissertation Abstracts International, Volume: 52-06, Section: B, page: 2827.
Contained By:	Dissertation Abstracts International52-06B.
標題:	Agriculture, Agronomy. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9133481

Soil physical properties and their influence on water infiltration and water and solute movement under no-tillage management.
Golabi, Mohammad Hossein.

Soil physical properties and their influence on water infiltration and water and solute movement under no-tillage management. - 114 p.

Source: Dissertation Abstracts International, Volume: 52-06, Section: B, page: 2827.

Thesis (Ph.D.)--University of Georgia, 1991.

In the last few years much research has been conducted to study and evaluate the effect of no-tillage on soil physical and chemical properties as well as productivity under no-till management. Soil structural changes and the development of macropores and continuous channels have been shown to be an important factor in increasing the water infiltration rate and reducing runoff in conservation tillage systems. Likewise, the fate of eroded soil and applied chemicals (fertilizers and pesticides) as they relate to conservation tillage and cultural practices are important issues among scientists, producers, and the public-at-large.Subjects--Topical Terms:

1018679
Agriculture, Agronomy.

Soil physical properties and their influence on water infiltration and water and solute movement under no-tillage management.
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100 1 $a Golabi, Mohammad Hossein. $3 1910963
245 1 0 $a Soil physical properties and their influence on water infiltration and water and solute movement under no-tillage management.
300 $a 114 p.
500 $a Source: Dissertation Abstracts International, Volume: 52-06, Section: B, page: 2827.
500 $a Director: William L. Hargrove.
502 $a Thesis (Ph.D.)--University of Georgia, 1991.
520 $a In the last few years much research has been conducted to study and evaluate the effect of no-tillage on soil physical and chemical properties as well as productivity under no-till management. Soil structural changes and the development of macropores and continuous channels have been shown to be an important factor in increasing the water infiltration rate and reducing runoff in conservation tillage systems. Likewise, the fate of eroded soil and applied chemicals (fertilizers and pesticides) as they relate to conservation tillage and cultural practices are important issues among scientists, producers, and the public-at-large.
520 $a The purpose of this study was to evaluate the dominant factors, namely surface condition and subsurface macroporosity that determine the rate of infiltration of water into soils, as well as the relationship between the macroporosity and chemical movement under no-till production.
520 $a Sprinkling infiltrometer and single ring infiltrometer were used to evaluate the effect of surface crop residue and subsurface macroporosity on water infiltration on no-till as compared to conventionally tilled plots in a long-term (13 years) tillage experiment. Also, different tracers and X-ray tomography were employed to qualitatively as well as quantitatively determine the extend and degree of continuity of macropores. Influence of rainfall distribution on the fate of chemical movement was investigated by applying a tracer to undisturbed soil columns obtained from the same long-term tillage experiment.
520 $a Greater water infiltration in no-till as compared to conventional soils was shown to be due to crop residue cover. The lower infiltration rate in conventionally tilled soils was shown to be due to surface sealing under raindrop impact on the bare soil. Results from tracer experiment produced breakthough curves indicating macropore flow in no-till soils. The presence of macropores was further evaluated using dye tracer and X-ray tomographic scanning. In a rainfall distribution experiment, it was shown that a small initial application of water was effective in promoting chemical movement through the soil profile in both no-till and conventionally tilled soils.
520 $a It is concluded that macroporosity in no-till soils can potentially lead to increased solute movement compared to conventional tillage, but the amount of solute leaching depends upon the rainfall amount and intensity immediately after application.
590 $a School code: 0077.
650 4 $a Agriculture, Agronomy. $3 1018679
690 $a 0285
710 2 0 $a University of Georgia. $3 515076
773 0 $t Dissertation Abstracts International $g 52-06B.
790 1 0 $a Hargrove, William L., $e advisor
790 $a 0077
791 $a Ph.D.
792 $a 1991
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9133481