Results 181 to 190 of about 2,224,808 (245)

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

The evolution of the Earth's surface iron cycle. [PDF]

Proc Natl Acad Sci U S A
Scholz F, Doetterl S, Hardisty DS.
europepmc   +1 more source

Climate change and perennial crop production: Evidence of yield impact and adaptation in California

American Journal of Agricultural Economics, EarlyView.
Abstract Perennial crops are economically important. They contribute to food security, providing essential nutrients that are often lacking in annual crops, and provide additional environmental benefits compared with annual crops. Despite their importance, empirical research on the impacts of climate change and adaptation on perennial crops remains ...
Yuanyuan Wen, Wei Zhang, Julian M. Alston   +2 more
wiley   +1 more source

A nutrient control on oxygenation dynamics during Earth's Great Oxidation Episode. [PDF]

Nat Commun
Alcott LJ, Mills BJW, Bekker A, Peng Z, Poulton SW.   +4 more
europepmc   +1 more source

The role of venture‐financed startups in innovation for US agriculture

American Journal of Agricultural Economics, EarlyView.
Abstract To evaluate the role played by startup companies in the innovation ecosystem of US agriculture, we compile a unique dataset of 6024 new entrants founded 1987–2019 that details their financing lifecycles, annual economic performance, and patenting activities.
Gregory D. Graff, Charles A. W. de Grazia, Nicholas E. Rada   +2 more
wiley   +1 more source

Continental weathering-phosphogenesis coupling across the ediacaran-cambrian transition, Southwestern China. [PDF]

PLoS One
Yang Y, Hao Q, Wen J, Zhao W, Zhang C.
europepmc   +1 more source

Risk management externalities in agrifood supply chains

American Journal of Agricultural Economics, EarlyView.
Abstract Firms may under‐ or over‐invest in risk management from the social planner's perspective, resulting in a negative externality on other economic agents in the supply chain. The externality of risk management is particularly relevant for agrifood supply chains, which frequently experience disruptions and play a primary role in preventing major ...
Jeffrey Hadachek, Meilin Ma
wiley   +1 more source

Massive release of predominantly magmatic carbon drove an Early Jurassic hyperthermal. [PDF]

Nat Commun
Chen W, Wu Y, Kemp DB, Cui Y, Pohl A, Ruebsam W, Zheng D, Li C.   +7 more
europepmc   +1 more source

Firm turnover under asymmetric information: Tanzania's agro‐dealer sector

American Journal of Agricultural Economics, EarlyView.
Abstract We study firm turnover (i.e., entry and exit) and its consumer implications in a market characterized by asymmetric information. Using a three‐round census of agro‐dealers in Tanzania's Morogoro Region, we document annual firm entry and exit rates of 33% and 17%, respectively.
Alix Naugler, Hope Michelson, Sarah Janzen, Christopher Magomba   +3 more
wiley   +1 more source

Erosion-driven delayed warming and marine stress prior to the end-Permian mass extinction. [PDF]

Nat Commun
Li S, Shen J, Grossman EL, Zhang S.
europepmc   +1 more source