Results 81 to 90 of about 608,537 (428)

Ryegrasses: An Option for an Annual Forage Crop in Alaska [PDF]

open access: yes, 1984
Annuals are often planted for a forage crop in Alaska, often on land that is being renovated or on newly cleared land, thus providing a longer opportunity for worldng the soil before seeding a perennial. Oats (Avena sativa) and barley (Hordeum vulgare)
Mitchell, William W.
core  

Optimal Lévy-flight foraging in a finite landscape [PDF]

open access: yesJournal of the Royal Society Interface 12, 20141158 (2015), 2014
We present a simple model to study L\'{e}vy-flight foraging in a finite landscape with countable targets. In our approach, foraging is a step-based exploratory random search process with a power-law step-size distribution $P(l) \propto l^{-\mu}$. We find that, when the termination is regulated by a finite number of steps $N$, the optimum value of $\mu$
arxiv   +1 more source

Forage fish, their fisheries, and their predators: who drives whom?

open access: yes, 2014
The North Sea has a diverse forage fish assemblage, including herring, targeted for human consumption; sandeel, sprat, and Norway pout, exploited by industrial fisheries; and some sardine and anchovy, supporting small-scale fisheries.
G. Engelhard   +13 more
semanticscholar   +1 more source

The EU target for organic farming: Potential economic and environmental impacts of two alternative pathways

open access: yesApplied Economic Perspectives and Policy, EarlyView.
Abstract The EU aims to reach 25% of the total agricultural area under organic farming by 2030. Interlinking a farm‐level and agro‐economic market model, we assess impacts of achieving the target either at Member State or aggregated EU level. Results show that flexible budget allocation across Member States would be more cost‐efficient and less ...
Dimitrios Kremmydas   +10 more
wiley   +1 more source

Ecological stability of broad bean (Vicia faba L.) in organic farming conditions

open access: yesВавиловский журнал генетики и селекции, 2020
The main direction in the breeding of legumes is the development of high-productive cultivars with stable yields. In order to assess the ecological stability of 17 broad bean accessions (Fb 1896, Fb 1903, Fb 1929, Fb 2481, Fb 2486, Fb 3270, BGE 002106 ...
N. A. Georgieva, V. I. Kosev
doaj   +1 more source

Forage Yields in Turkey Hill Wilderness in East Texas for White-tailed Deer [PDF]

open access: yes, 2016
Wilderness areas are often considered quality areas where natural processes occur without human activity. It is often assumed that these unmanaged areas will provide and support quality wildlife habitat. The objective of this study was to evaluate the
Farrish, Kenneth W   +2 more
core   +1 more source

Stochastic dynamics of social patch foraging decisions [PDF]

open access: yesarXiv, 2022
Animals typically forage in groups. Social foraging can help animals avoid predation and decrease their uncertainty about the richness of food resources. Despite this, theoretical mechanistic models of patch foraging have overwhelmingly focused on the behavior of single foragers.
arxiv  

Impact of index insurance on downside income risk: Evidence from northern Kenya

open access: yesApplied Economic Perspectives and Policy, EarlyView.
Abstract We assessed the impact of index‐based livestock insurance (IBLI) on household income and its higher‐order moments (i.e., variance and skewness). The study uses four waves of panel survey data from northern Kenya and applies a two stage least squares (2SLS) instrumental variables regression to estimate the causal impacts.
Kelvin Mashisia Shikuku, Ibrahim Ochenje
wiley   +1 more source

Cool Season Annual Forage Mixtures Trial [PDF]

open access: yes, 2015
In 2015, the University of Vermont Extension Northwest Crops and Soils Program evaluated yield and quality of five cool season annual forage species and five mixtures at Borderview Research Farm in Alburgh, VT.
Calderwood, Lily   +5 more
core   +1 more source

Adaptive patch foraging in deep reinforcement learning agents [PDF]

open access: yesarXiv, 2022
Patch foraging is one of the most heavily studied behavioral optimization challenges in biology. However, despite its importance to biological intelligence, this behavioral optimization problem is understudied in artificial intelligence research. Patch foraging is especially amenable to study given that it has a known optimal solution, which may be ...
arxiv  

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