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Agronomic, economic and environmenta...

Kabaluapa, Nkashama K.

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Agronomic, economic and environmental effects of alley cropping and terracing in North Alabama.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Agronomic, economic and environmental effects of alley cropping and terracing in North Alabama./
作者:	Kabaluapa, Nkashama K.
面頁冊數:	127 p.
附註:	Source: Dissertation Abstracts International, Volume: 65-11, Section: B, page: 5466.
Contained By:	Dissertation Abstracts International65-11B.
標題:	Agriculture, Agronomy. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3154817
ISBN:	049615480X

Agronomic, economic and environmental effects of alley cropping and terracing in North Alabama.
Kabaluapa, Nkashama K.

Agronomic, economic and environmental effects of alley cropping and terracing in North Alabama. - 127 p.

Source: Dissertation Abstracts International, Volume: 65-11, Section: B, page: 5466.

Thesis (Ph.D.)--Auburn University, 2004.

Agricultural production is a major cause of non-point source pollution in the U.S. Alley cropping, grass barriers and terraces can significantly contribute to reduction in soil and nutrient losses, and therefore, sustain crop yield and improve water quality. In the southeastern U.S, there is an emerging interest in research for alley cropping and grass barriers as alternative soil conservation barriers to costly terraces. Data are lacking for the performance of these alternatives and no studies have compared them in Alabama. This research was carried out at the North Alabama research center in Cullman County, Alabama, on a Hartsells sandy loam soil, 6.5% field slope, to study the effectiveness of alley cropping of mimosa, blackberry and switchgrass hedges in (i) reducing surface runoff, sediment yield and nutrient losses, (ii) sustaining crop yield and nutrient uptake, (iii) improving soil physical and chemical properties, and (iv) returning benefits to farmers compared to underground pipe outlet parallel terraces or no barrier control.

ISBN: 049615480XSubjects--Topical Terms:

1018679
Agriculture, Agronomy.

Agronomic, economic and environmental effects of alley cropping and terracing in North Alabama.
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245 1 0 $a Agronomic, economic and environmental effects of alley cropping and terracing in North Alabama.
300 $a 127 p.
500 $a Source: Dissertation Abstracts International, Volume: 65-11, Section: B, page: 5466.
500 $a Directors: Dennis A. Shannon; K. H. Yoo.
502 $a Thesis (Ph.D.)--Auburn University, 2004.
520 $a Agricultural production is a major cause of non-point source pollution in the U.S. Alley cropping, grass barriers and terraces can significantly contribute to reduction in soil and nutrient losses, and therefore, sustain crop yield and improve water quality. In the southeastern U.S, there is an emerging interest in research for alley cropping and grass barriers as alternative soil conservation barriers to costly terraces. Data are lacking for the performance of these alternatives and no studies have compared them in Alabama. This research was carried out at the North Alabama research center in Cullman County, Alabama, on a Hartsells sandy loam soil, 6.5% field slope, to study the effectiveness of alley cropping of mimosa, blackberry and switchgrass hedges in (i) reducing surface runoff, sediment yield and nutrient losses, (ii) sustaining crop yield and nutrient uptake, (iii) improving soil physical and chemical properties, and (iv) returning benefits to farmers compared to underground pipe outlet parallel terraces or no barrier control.
520 $a Terraces were the most effective barriers and significantly reduced surface water runoff, sediment yield, NH4-N, NO3-N, Total Kjeldahl Nitrogen (TKN), total K, Ca and Mg by 74, 84, 64, 84, 76, 76, 78, and 79%, respectively, compared to the control. Switchgrass hedges were the second best soil conservation barriers by reducing the same parameters as for terraces. Blackberry hedgerows were the next best barrier after those of switchgrass but did not significantly reduce total K, whereas the plot had the highest loss of NH4-N. Mimosa hedgerows ranked fourth and did not significantly affect any form of N and total K losses.
520 $a Vegetative barrier effect reduction in surface runoff and sediment and nutrient concentrations and yields, progressively improved over time. Indeed, 2002 and 2003 were establishment years and vegetative barriers effectiveness is expected to improve in the next few years. Most losses occurred during year 2003, which was the rainiest and generated the highest runoff losses. Conservation barriers' effects on nutrient losses contributed to improve water quality in the receiving stream compared to cultivation without barriers.
520 $a Corn and cowpea yields were not significantly affected by treatments at the 0.05 probability level. Alley cropping and terraces had a minimal effect on crop yield, especially for corn, despite a 7% reduction in cropping area due to the barriers. Terraces and alley cropping did not significantly affect the removal of most nutrients. However, harvested sweet corn in switchgrass and mimosa treatments had significantly lower N removal than did the control, blackberry and terrace treatments. (Abstract shortened by UMI.)
590 $a School code: 0012.
650 4 $a Agriculture, Agronomy. $3 1018679
650 4 $a Environmental Sciences. $3 676987
650 4 $a Economics, Agricultural. $3 626648
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790 1 0 $a Yoo, K. H., $e advisor
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791 $a Ph.D.
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