Results 61 to 70 of about 20,560 (258)

Diatom‐Inspired 1D Immobile Robots Capable of 2D Collective Mobility

Advanced Intelligent Systems, EarlyView.
This study presents a diatom‐inspired robotic system that explores group coordination through limited physical interactions. The researchers tune groups of Barbots, simple robotic agents that possess neither individual mobility nor explicit communication capabilities, to achieve complex and adaptive collaboration based on environmental light.
Tianyi Hu, Yunjia Zhang, Chu Qiao, Tingrui Zhang, Shuguang Li   +4 more
wiley   +1 more source

Assessment of the nutritional status of grassland: nitrogen nutrition index

Semina: Ciências Agrárias, 2014
The aim of this study was to assess the Nitrogen Nutrition Index (NNI) of an Urochloa plantaginea pasture submitted to different nitrogen (N) levels and forage mass (FM) through dilution curve model.
Laércio Ricardo Sartor , Tangriani Simioni Assmann, André Brugnara Soares , Paulo Fernando Adami , Alceu Luis Assmann   +4 more
doaj   +1 more source

Uncovering renewable energy policy impact channels on land values, the local farm structure, and farmland heterogeneity

American Journal of Agricultural Economics, EarlyView.
Abstract Germany's Renewable Energy Sources Act (REA), enacted in 2000 and subsequently amended, subsidized national renewable energy production with fixed feed‐in tariffs for renewable energy sources (RE) from wind, solar, and biogas. Empirical studies suggest that the policy was creating windfall effects for landowners and attribute farmland use ...
Lars Isenhardt, Stefan Seifert, Saskia Wolff, Tobia Lakes, Marten Graubner, Axel Werwatz, Silke Hüttel   +6 more
wiley   +1 more source

Beef heifers performance in natural grassland under continuous and rotational grazing in the autumn-winter

Ciência Rural, 2015
The aim of this study was to evaluate the performance of beef heifers in natural grassland under continuous and rotational grazing during the autumn-winter period.
Émerson Mendes Soares, Fernando Luiz Ferreira de Quadros, Régis Maximiliano Roos de Carvalho, Leandro Bittencourt de Oliveira, Felipe Jochims, Gabriela Machado Dutra, Augusto Miranda Fernandes, José Pedro Pereira Trindade, Gustavo Freitas Ilha   +8 more
doaj   +1 more source

Accounting for animal health in efficiency analysis: An application to Swedish dairy farms

American Journal of Agricultural Economics, EarlyView.
Abstract Poor animal health is a central concern in modern livestock production. Despite the necessity to incorporate animal health in efficiency analysis, the theoretical and empirical developments are limited on this subject. This article appropriately characterizes the axiomatic properties of animal health within a production framework.
Frederic Ang, Enoch Owusu‐Sekyere, Karin Alvåsen, Helena Hansson   +3 more
wiley   +1 more source

Herbage accumulation of bahiagrass hybrids in two different environments in southern Brazil

Pesquisa Agropecuária Gaúcha, 2019
The native grasslands of southern Brazil have sustained livestock farming for many years; however, decline in pasture areas has led to the loss of genetic diversity of forage species.
Marlon Risso Barbosa, Éder Alexandre Minski Da Motta, Juliana Medianeira Machado, Karine Cristina Kryck, Ionara Fátima Conterato, Roberto Luis Weiler, Miguel Dall’Agnol, Carine Simioni   +7 more
doaj  

Partitioning of Forage Mass and Nutritive Value in Sunn Hemp Leaf and Stem Components

International Journal of Agronomy, 2021
Sunn hemp (SH; Crotalaria juncea L.) is a fast-growing, annual, warm-season tropical legume that could complement less productive cool-season forages such as tall fescue during summer.
Isaac Lepcha, Harley D. Naumann
doaj   +1 more source

Long‐term demography and spatial genetic structure reveal mechanisms of Sassafras albidum population persistence through clonality

American Journal of Botany, EarlyView.
Abstract Premise Vegetative regeneration is a key mechanism of woody plant persistence in forest ecosystems, and the coupled roles of basal sprouting and clonal growth in shaping long‐term population dynamics have been understudied. Basal sprouting replaces stems at fixed ramet locations, whereas clonal growth via root suckering produces spatially ...
J. T. Michel, Jonathan P. Evans, Skyler J. Fox, Ashley B. Morris   +3 more
wiley   +1 more source

Pollination by long‐proboscid horseflies and its implications for reproductive isolation among coflowering Satyrium orchids in South Africa

American Journal of Botany, EarlyView.
Abstract Premise Floral adaptations to pollinators can drive lineage diversification and promote coexistence of species. We investigated the reproductive biology of Satyrium longicolle, a South African orchid that we hypothesized to belong to a long‐proboscid horsefly pollination guild and examined overlap of pollinators and floral traits among ...
Steven D. Johnson, Matthew Moir, Ethan Newman, Timotheüs Van der Niet   +3 more
wiley   +1 more source

Pearl's causality for integrating ecological datasets: A case study on Myricaria germanica in northern Italy

Applications in Plant Sciences, EarlyView.
Abstract Premise Applied ecology can significantly influence policy decisions on environmental issues. Therefore, research in this field should be as transparent and reproducible as possible. Existing expertise from a broad range of disciplines should also be integrated into ecological research to allow researchers to maximize understanding of complex ...
Kailin Weitkämper, Kilian Rückschloß, Tommaso Sitzia, Bruno Michielon, Silke Werth, Felix Weitkämper   +5 more
wiley   +1 more source