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Efficacy of Conservation Agriculture...

Edralin, Don Immanuel A.

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Efficacy of Conservation Agriculture in Enhancing Yield of Vegetables and Soil Quality in Cambodia.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Efficacy of Conservation Agriculture in Enhancing Yield of Vegetables and Soil Quality in Cambodia./
作者:	Edralin, Don Immanuel A.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2015,
面頁冊數:	98 p.
附註:	Source: Dissertation Abstracts International, Volume: 76-12(E), Section: B.
Contained By:	Dissertation Abstracts International76-12B(E).
標題:	Plant sciences. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3718787
ISBN:	9781321987812

Efficacy of Conservation Agriculture in Enhancing Yield of Vegetables and Soil Quality in Cambodia.
Edralin, Don Immanuel A.

Efficacy of Conservation Agriculture in Enhancing Yield of Vegetables and Soil Quality in Cambodia. - Ann Arbor : ProQuest Dissertations & Theses, 2015 - 98 p.

Source: Dissertation Abstracts International, Volume: 76-12(E), Section: B.

Thesis (Ph.D.)--North Carolina Agricultural and Technical State University, 2015.

In order to address food demands sustainably, striking a balance between food production and environmental impact is essential. Such is the goal of conservation agriculture (CA) with three principles: minimum soil disturbance, continuous mulch, and diverse species rotations. Contrasting reports on CA's success in agronomic crops suggests the need for testing before it can be applicable to vegetables. Limited work has been done in CA with vegetables, especially on non-mechanized farms. Information from such studies would provide understanding on the applicability of CA in resource-poor conditions. Vegetables may not be impacted adversely by CA due to the intensive management involved in vegetables. This research was conducted from June 2013 to October 2014 to test CA compared with conventional tillage (T) in smallholder commercial household farms in three villages in Siem Reap, Cambodia, with and without drip irrigation. Also, labor on weeding was monitored and soil quality measured. The results show that yield of vegetables was not affected during the transition period from conventional tillage to CA, and they were increased starting on the third harvest and continued on to the fourth. The labor in watering, using sprinkler watering cans, was reduced by 65% with the use of drip irrigation with a water pump. Weeding was reduced by 30% due to weed suppression by mulch in all production cycles. The soil quality was improved in CA compared to T by increasing soil organic carbon and nitrogen from successfully growing cover crop and main crops. There was more soil moisture retained in CA with reduced soil temperature during the dry season that may be beneficial micro climate for plants roots and microorganisms during the dry period. Field soil respiration was higher in CA than T which indicates more microbial activity and increased mineralization of soil organic carbon for nutrient release. Soil enzyme activities were highly variable, but correlation analysis show significant positive correlations between soil organic carbon, dehydrogenase, and ?-glucosidase which support the claim of higher soil biological activities in CA. CA may be applicable to resource constrained smallholder commercial household farmers with labor savings and improved soil quality compared with conventional tillage.

ISBN: 9781321987812Subjects--Topical Terms:

3173832
Plant sciences.

Efficacy of Conservation Agriculture in Enhancing Yield of Vegetables and Soil Quality in Cambodia.
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