東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

FindBook

Google Book

Amazon

博客來

Evaluating Physical and Cultural Methods to Improve Weed Management in Organic Vegetables.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Evaluating Physical and Cultural Methods to Improve Weed Management in Organic Vegetables./
作者:	Champagne, Rebecca J.
面頁冊數:	1 online resource (121 pages)
附註:	Source: Dissertations Abstracts International, Volume: 84-04, Section: B.
Contained By:	Dissertations Abstracts International84-04B.
標題:	Weeds. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29385981click for full text (PQDT)
ISBN:	9798352644317

Evaluating Physical and Cultural Methods to Improve Weed Management in Organic Vegetables.
Champagne, Rebecca J.

Evaluating Physical and Cultural Methods to Improve Weed Management in Organic Vegetables. - 1 online resource (121 pages)

Source: Dissertations Abstracts International, Volume: 84-04, Section: B.

Thesis (Ph.D.)--The University of Maine, 2022.

Includes bibliographical references

Effectively managing weeds in organic vegetable production continues to be challenging and costly. Cultivation, often referred to as physical weed control (PWC), is foundational for organic farmers; however, efficacy tends to be low and highly variable. Additionally, some crops are slow to germinate, and thus have poor competitive ability against weeds and high mortality from cultivation. This can result in high costs for hand-weeding labor, abundant seed rain into the soil, and a recurring, often increasing, weed problem. These challenges may be addressed by "stacking" tools to increase weed control efficacy, integrating targeted seedbank management strategies to reduce the germinable weed seedbank, and characterizing crop cultivar early growth traits to better understand crop tolerance to different tool mechanisms.Chapter one reviews weed management from the perspective of small-scale organic vegetable farms and the unique challenges they face. Weed control objectives, such as minimizing weed seed rain and reducing labor costs, seed- and seedling-focused management like tarping and hand-tool options, and future research needs for small-scale farms are discussed.Chapter two assesses a weed management systems experiment combining tool stacking with seedbank management and how these practices can affect weed control efficacy and the germinable weed seedbank, respectively. Tool stacking helped increase efficacy and lower weed seedling densities during the growing season, while seedbank management reduced the germinable weed seedbank and contributed to higher crop yields in bush bean and table beet.Chapter three builds upon the previous chapter by examining how tool stacking can be used with the Terrateck Double Wheel Hoe, a unique hand tool. The effects of single tools and tool stacking on crop mortality and weed control efficacy were examined in bush bean and table beet. Tool stacking increased weed control efficacy in both crops, and although stacking did not result in higher crop mortality in bush bean, table beet mortality was high.Chapter four assesses the concept of "cultivation tolerance" with nine carrot cultivars, selected to represent large, average, and relatively small plants. Root and shoot characteristics were measured in greenhouse experiments, and carrot mortality and yield from cultivation were measured in field experiments. Few differences in early growth characteristics were found at two-true leaves, and unexpectedly, no differences in cultivar mortality were detected in the field.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798352644317Subjects--Topical Terms:

544957
Weeds.
Index Terms--Genre/Form:

542853
Electronic books.

Evaluating Physical and Cultural Methods to Improve Weed Management in Organic Vegetables.
LDR:03782nmm a2200337K 4500 001 2353783
005 20230313091352.5
006 m o d
007 cr mn ---uuuuu
008 241011s2022 xx obm 000 0 eng d
020 $a 9798352644317
035 $a (MiAaPQ)AAI29385981
035 $a (MiAaPQ)U_Maine4646
035 $a AAI29385981
040 $a MiAaPQ $b eng $c MiAaPQ $d NTU
100 1 $a Champagne, Rebecca J. $3 3694114
245 1 0 $a Evaluating Physical and Cultural Methods to Improve Weed Management in Organic Vegetables.
264 0 $c 2022
300 $a 1 online resource (121 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
338 $a online resource $b cr $2 rdacarrier
500 $a Source: Dissertations Abstracts International, Volume: 84-04, Section: B.
500 $a Advisor: Gallandt, Eric.
502 $a Thesis (Ph.D.)--The University of Maine, 2022.
504 $a Includes bibliographical references
520 $a Effectively managing weeds in organic vegetable production continues to be challenging and costly. Cultivation, often referred to as physical weed control (PWC), is foundational for organic farmers; however, efficacy tends to be low and highly variable. Additionally, some crops are slow to germinate, and thus have poor competitive ability against weeds and high mortality from cultivation. This can result in high costs for hand-weeding labor, abundant seed rain into the soil, and a recurring, often increasing, weed problem. These challenges may be addressed by "stacking" tools to increase weed control efficacy, integrating targeted seedbank management strategies to reduce the germinable weed seedbank, and characterizing crop cultivar early growth traits to better understand crop tolerance to different tool mechanisms.Chapter one reviews weed management from the perspective of small-scale organic vegetable farms and the unique challenges they face. Weed control objectives, such as minimizing weed seed rain and reducing labor costs, seed- and seedling-focused management like tarping and hand-tool options, and future research needs for small-scale farms are discussed.Chapter two assesses a weed management systems experiment combining tool stacking with seedbank management and how these practices can affect weed control efficacy and the germinable weed seedbank, respectively. Tool stacking helped increase efficacy and lower weed seedling densities during the growing season, while seedbank management reduced the germinable weed seedbank and contributed to higher crop yields in bush bean and table beet.Chapter three builds upon the previous chapter by examining how tool stacking can be used with the Terrateck Double Wheel Hoe, a unique hand tool. The effects of single tools and tool stacking on crop mortality and weed control efficacy were examined in bush bean and table beet. Tool stacking increased weed control efficacy in both crops, and although stacking did not result in higher crop mortality in bush bean, table beet mortality was high.Chapter four assesses the concept of "cultivation tolerance" with nine carrot cultivars, selected to represent large, average, and relatively small plants. Root and shoot characteristics were measured in greenhouse experiments, and carrot mortality and yield from cultivation were measured in field experiments. Few differences in early growth characteristics were found at two-true leaves, and unexpectedly, no differences in cultivar mortality were detected in the field.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2023
538 $a Mode of access: World Wide Web
650 4 $a Weeds. $3 544957
650 4 $a Agricultural production. $3 3559355
650 4 $a Seeds. $3 573605
650 4 $a Competition. $3 537031
650 4 $a Agriculture. $3 518588
650 4 $a Agronomy. $3 2122783
655 7 $a Electronic books. $2 lcsh $3 542853
690 $a 0473
690 $a 0285
710 2 $a ProQuest Information and Learning Co. $3 783688
710 2 $a The University of Maine. $3 1029373
773 0 $t Dissertations Abstracts International $g 84-04B.
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29385981 $z click for full text (PQDT)