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Changing Post-harvest Practices, Imp...

Matthews, Luke James-Hight.

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Changing Post-harvest Practices, Impacts on Waste Grain Availability, and Grower's Perspectives: A Study of Rice and Corn Fields for Wintering Waterfowl in the Central Valley.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Changing Post-harvest Practices, Impacts on Waste Grain Availability, and Grower's Perspectives: A Study of Rice and Corn Fields for Wintering Waterfowl in the Central Valley./
Author:	Matthews, Luke James-Hight.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2019,
Description:	104 p.
Notes:	Source: Masters Abstracts International, Volume: 81-04.
Contained By:	Masters Abstracts International81-04.
Subject:	Wildlife conservation. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=13812043
ISBN:	9781088301258

Changing Post-harvest Practices, Impacts on Waste Grain Availability, and Grower's Perspectives: A Study of Rice and Corn Fields for Wintering Waterfowl in the Central Valley.
Matthews, Luke James-Hight.

Changing Post-harvest Practices, Impacts on Waste Grain Availability, and Grower's Perspectives: A Study of Rice and Corn Fields for Wintering Waterfowl in the Central Valley. - Ann Arbor : ProQuest Dissertations & Theses, 2019 - 104 p.

Source: Masters Abstracts International, Volume: 81-04.

Thesis (M.S.)--University of California, Davis, 2019.

This item must not be sold to any third party vendors.

Food supplies for dabbling ducks in the Central Valley during winter are comprised of 62% rice and corn. However, agricultural practices including post-harvest treatments of rice and corn fields, have been changing in the Central Valley, largely due to recurring drought conditions. The Central Valley Joint Venture, in collaboration with Ducks Unlimited and the California Department of Fish & Wildlife, identified three critical information needs surrounding agricultural waste grains in the Central Valley of California; specifically: (1) there is a lack of quantitative data on the post-harvest treatments currently being used; (2) there is little information on the extent (acreage; frequency) to which these treatments are being employed; and (3) we have no data on the impacts of these treatments on food availability for wintering waterfowl. This study was designed to address each of those critical information needs. Based on averages over two survey years (in December and January of 2016-17, and 2017-18), our results demonstrate that Incorporation was used on 25.8% of the total rice acreage while Flooding only occurred on 47% of rice acreage. Only 34.7% of the corn acreage was treated in a way that is considered to provide any food value for waterfowl; in contrast, corn as a rotational crop was the most common at 55% of the total acreage. Incorporation was the second most common post-harvest treatment detected in corn fields, at 23% of the total acreage.The food value in rice fields did not vary greatly across post-harvest treatments; the mean abundance of waste rice grain, across all treatments, was 286 lbs/acre in dry fields and 132 lbs/acre in flooded fields. Variation in food value in corn fields was greater and influenced strongly by post-harvest treatment. Fields that were Not Incorporated post-harvest contained 228 lbs/acre, on average, whereas Incorporated treatments contained only 52 lbs/acre; the overall average, across all post-harvest treatment, was 164 lbs/acre. A comprehensive survey was sent to 1,650 rice growers with a 20.2% response rate (based on the American Association for Public Opinion Research 4.0 calculations) . Key observations from the survey include the following: (1) 89% of rice farmers and landowner allow hunting on their property, and 27% of those collect fees from the leases, enabling those growers to recoup 63% of their water costs. (2) Over 80% of respondents view rice as either 'very important' or 'somewhat important' as both food and habitat for wildlife, despite the observation that 70 and 60% of grower's experience wildlife related losses in the spring and fall respectively. (3) 50% of respondents indicated that water costs would be the primary factor that would cause them to stop post-harvest flooding, water cost was also the most cited factor that would cause growers to change their post-harvest management. The average water cost that growers were willing to pay, before being forced to shift away from flooding, was approximately $24/acre. Finally, (4) when asked which post-harvest treatment growers would use if they did not have winter water, baling was the second most common response; however; 70% of respondents indicated that they would not be interested in baling based on the price of rice straw alone.

ISBN: 9781088301258Subjects--Topical Terms:

542165
Wildlife conservation.
Subjects--Index Terms:

Agriculture

Changing Post-harvest Practices, Impacts on Waste Grain Availability, and Grower's Perspectives: A Study of Rice and Corn Fields for Wintering Waterfowl in the Central Valley.
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