نتایج جستجو برای: harvest

تعداد نتایج: 23260  

2015
WEN J. WANG HONG S. HE FRANK R. THOMPSON JACOB S. FRASER BRICE B. HANBERRY WILLIAM D. DIJAK

Most temperate forests in U.S. are recovering from heavy exploitation and are in intermediate successional stages where partial tree harvest is the primary disturbance. Changes in regional forest composition in response to climate change are often predicted for plant functional types using biophysical process models. These models usually simplify the simulation of succession and harvest and may...

2012
Xiaobai Li Wengui Yan Hesham Agrama Limeng Jia Aaron Jackson Karen Moldenhauer Kathleen Yeater Anna McClung Dianxing Wu

Harvest index is a measure of success in partitioning assimilated photosynthate. An improvement of harvest index means an increase in the economic portion of the plant. Our objective was to identify genetic markers associated with harvest index traits using 203 O. sativa accessions. The phenotyping for 14 traits was conducted in both temperate (Arkansas) and subtropical (Texas) climates and the...

2011
Virginie Rolland Jeffrey A. Hostetler Tommy C. Hines Fred A. Johnson H. Franklin Percival Madan K. Oli

Context. Hunting-related (hereafter harvest) mortality is assumed to be compensatory in many exploited species. However,whenharvestmortality is additive, hunting can lead topopulationdeclines, especially onpublic landwherehunting pressure can be intense. Recent studies indicate that excessive hunting may have contributed to the decline of a northern bobwhite (Colinus virginianus) population in ...

Journal: :Ecological applications : a publication of the Ecological Society of America 2009
Elise F Zipkin Clifford E Kraft Evan G Cooch Patrick J Sullivan

Population control through harvest has the potential to reduce the abundance of nuisance and invasive species. However, demographic structure and density-dependent processes can confound removal efforts and lead to undesirable consequences, such as overcompensation (an increase in abundance in response to harvest) and instability (population cycling or chaos). Recent empirical studies have demo...

2017
Nacer Bellaloui James R. Smith Alemu Mengistu

The timing of harvest is a major factor affecting seed quality in soybean, particularly in Midsouthern USA, when rain during harvest period is not uncommon. The objective of this research was to evaluate the effects of time of harvest on soybean seed quality (seed composition, germination, seed coat boron, and lignin) in high germinability (HG) breeding lines (50% exotic) developed under high h...

2011
Alison M. Jones

A recent shift in the pattern of commercial harvest in the Keppel Island region of the southern inshore Great Barrier Reef raises concern about the depletion of a number of relatively rare restricted range taxa. The shift appears to be driven by demand from the United States (US) for corals for domestic aquaria. Data from the annual status reports from the Queensland Coral Fishery were compared...

2011
JOHN E. MCDONALD

We monitored 142 radiocollared adult (!1.0 yr old) white-tailed deer (Odocoileus virginianus) in 3 study areas of Massachusetts, USA, to estimate annual survival and mortality due to legal hunting. We then applied these rates to deer harvest information to estimate deer population trends over time, and compared these to trends derived solely from harvest data estimates. Estimated adult female s...

Journal: :Computers and Electronics in Agriculture 2015
Surached Thuankaewsing S. Khamjan Kullapapruk Piewthongngam Supachai Pathumnakul

In this study, the harvest scheduling problem of a group of cane growers in Thailand is addressed. Each member in a group is required to consistently supply sugar cane to a mill for the entire harvest season. However, the current scheduling does not account for the time-variant cane production of each cane field, which leads to unequal opportunities for growers to harvest. A portion of growers ...

Journal: :CoRR 2016
Hongwu Liu Kyung Sup Kwak

This paper proposes a virtual harvest-transmit model and a harvest-transmit-store model for amplify-andforward full-duplex relay (FDR) networks with power splittingbased simultaneous wireless information and power transfer. The relay node employs a battery group consisting of two rechargeable batteries. By switching periodically between two batteries for charging and discharging in two consecut...

2013
Carie Hoover Tony J. Pitcher Villy Christensen

Simulations testing the future impacts of harvest and climate change to the Hudson Bay marine ecosystem were created utilizing an existing Ecopath with Ecosim model (Hoover et al., in this issue). Building on past simulations depicting known changes to the region, a suite of future scenarios was constructed to include a variety of climate change and harvest levels. Previously identified ecosyst...

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