Results 71 to 80 of about 63,481 (254)

Sustainable Productivity Growth in Agriculture: The Role of Shifts in R&D Investments and Technology

Applied Economic Perspectives and Policy, EarlyView.
ABSTRACT The objective of the paper is to evaluate the long‐term prospects of sustainable productivity growth linked to plausible assumptions on public agricultural R&D investments as the key productivity driver. Second, it investigates the role of changing R&D focus from yield maximization to input saving technologies (fertilizers and pesticides). The
Zuzana Smeets Křístková, Michiel van Dijk, Robert M'Barek, Hans van Meijl, Tomas Ratinger   +4 more
wiley   +1 more source

An analysis of the forces required to drag sheep over various surfaces

Applied Ergonomics, 2002
Some occupational health and safety hazards associated with sheep shearing are related to shearing shed design. One aspect is the floor of the catching pen, from which sheep are caught and dragged to the shearing workstation. Floors can be constructed from various materials, and may be level or gently sloping.
Harvey, John, Culvenor, John, Payne, Warren, Cowley, Stephen, Lawrance, Michael, Stuart, David, Williams, Robyn   +6 more
openaire   +4 more sources

The Power of Unity: Collective Action and Smallholder Agricultural Performance in West Africa

Agribusiness, EarlyView.
ABSTRACT We analyze the impact of collective action through farmer‐based organizations (FBOs) on smallholders' farm performance and income inequality in Ghana, Benin, The Gambia, and Mali. We find that FBO membership increases cereal yield in Ghana and The Gambia, legume yield in Mali, ruminant numbers in Benin and The Gambia, and total farm income in ...
Emmanuel Donkor, Bright Owusu Asante, David Boansi, Victor Owusu   +3 more
wiley   +1 more source

Programmable Flocks: Hierarchical Swarm Control via Dynamic Parameter Injection

Advanced Intelligent Systems, EarlyView.
We present a method for the control of robot swarms which allows the shaping and the translation of patterns of simple robots (“smart particles”), using two types of devices. These two types represent a hierarchy: a larger group of simple, oblivious robots (which we call the workers) that is governed by simple local attraction forces and a smaller ...
Vivek Shankar Varadharajan, Giovanni Beltrame   +1 more
wiley   +1 more source

Causal analysis of trade loss from pathogens: A global study of foot and mouth disease impacts on meat exports

American Journal of Agricultural Economics, EarlyView.
Abstract Our general interest is in global trade loss from livestock pathogens, specifically exports. We adopt a causal inference approach that considers animal disease outbreaks over time as non‐staggered binary treatments with the potential for switching in (infection) and out of treatment (recovery) within the sample period. The outcome evolution of
Mohammad Maksudur Rahman, Thomas L. Marsh   +1 more
wiley   +1 more source

Net mineral requirements for the growth and maintenance of Somali lambs

Animal, 2019
Minerals are limiting factors in animal production, and the knowledge of mineral requirements for livestock is crucial to the success of a commercial enterprise.
E.S. Pereira, F.W.R. Lima, A.C.N. Campos, M.S.S. Carneiro, L.P. Silva, M.W.F. Pereira, A.N. Medeiros, L.R. Bezerra, R.L. Oliveira   +8 more
doaj   +1 more source

Measurement and evaluation of surgical models of spinal fusion in mice, rats, and rabbits

Animal Models and Experimental Medicine, EarlyView.
In this study, spinal fusion models in mice, rats and rabbits are compared and discussed. The results show that after comparing the anatomical structure and the complexity of surgical operation, among the three experimental animals in this study, the rabbit as an experimental animal is superior to the mouse and the rat in the establishment of spinal ...
Jianghong Lu, Yicun Hu, Xin Yao
wiley   +1 more source

Engraftment of sheep splenic lymphocytes into NBSGW mice and application in Brucella infection

Animal Models and Experimental Medicine, EarlyView.
A sheep splenocyte‐reconstituted mouse model (Sh‐Spl mice) was established via intravenous injection of sheep splenic lymphocytes into immunodeficient mice to evaluate Brucella infection. Abstract Background The development of immune reconstituted xenograft mouse models has addressed the limitations imposed by interspecies immunological differences in ...
Xiaowei Wang, Shicheng Wan, Yanmin Guo, Hongyu Han, Fei Luo, Dongmei Jiang, Xiaorong Yang, Quanhai Pang, Haisheng Yu, Jinlian Hua   +9 more
wiley   +1 more source

Animal models of idiopathic membranous nephropathy: Recent advances and future perspectives

Animal Models and Experimental Medicine, EarlyView.
This review focuses on the evolution of idiopathic membranous nephropathy (IMN) animal models from traditional approaches (Heymann nephritis, C‐BSA, APA) to antigen‐specific models (PLA2R, THSD7A), critically evaluating their advances and limitations in replicating human IMN pathology.
Qiuying Liu, Huixian Bian, Jianhua Liu, Lina Wu, Zhijie Zhang, Hongli Zhao, Xiaosong Qin   +6 more
wiley   +1 more source

Hormone glycosylation required for lutropin receptor recognition in sheep testis

FEBS Letters, 1990
The high affinity binding sites for ovine pituitary lutropin (oLH) present in DLS‐1 sheep testis recognized only the fully glycosylated ovine or bovine hormone (bLH) in receptor binding assays using 125I‐labeled oLH. Chemically deglycosylated (DG‐) oLH or bLH which were fully active with other lutropin receptors (rat/pig) were completely inert in the ...
Sairam, M.R., Bhargavi, G.N., Yarney, T.A.   +2 more
openaire   +2 more sources