Managerial Capabilities, Farm Efficiency and Price Signals: Their Influence on Farmers’ Export Participation

2011 ◽  
Author(s):  
Amit Kumar Dwivedi ◽  
Prahadeeswaran M.
Keyword(s):  
Price Signals ◽  
Farm Efficiency ◽  
Managerial Capabilities

scholarly journals Adaptive Robust Optimization-Based Optimal Operation of Microgrids Considering Uncertainties in Arrival and Departure Times of Electric Vehicles

Energies ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 2646 ◽  
Author(s):  
Se-Hyeok Choi ◽  
Akhtar Hussain ◽  
Hak-Man Kim
Keyword(s):  
Robust Optimization ◽  
Electric Vehicles ◽  
Unit Commitment ◽  
Renewable Energy Sources ◽  
Market Price ◽  
Optimal Operation ◽  
Worst Case ◽  
Price Signals ◽  
Power Trading ◽  
The Impact

The optimal operation of microgrids is challenging due to the presence of various uncertain factors, i.e., renewable energy sources, loads, market price signals, and arrival and departure times of electric vehicles (EVs). In order to incorporate these uncertainties into the operation model of microgrids, an adaptive robust optimization-based operation method is proposed in this paper. In particular, the focus is on the uncertainties in arrival and departure times of EVs. The optimization problem is divided into inner and outer problems and is solved iteratively by introducing column and constraint cuts. The unit commitment status of dispatchable generators is determined in the outer problem. Then, the worst-case realizations of all the uncertain factors are determined in the inner problem. Based on the values of uncertain factors, the generation amount of dispatchable generators, the amount of power trading with the utility grid, and the charging/discharging amount of storage elements are determined. The performance of the proposed method is evaluated using three different cases, and sensitivity analysis is carried out by varying the number of EVs and the budget of uncertainty. The impact of the budget of uncertainty and number of EVs on the operation cost of the microgrid is also evaluated considering uncertainties in arrival and departure times of EVs.

scholarly journals Analysing wind farm efficiency on complex terrains

2014 ◽  
Vol 524 ◽  
pp. 012142 ◽  
Author(s):  
Francesco Castellani ◽  
Davide Astolfi ◽  
Ludovico Terzi ◽  
Kurt Schaldemose Hansen ◽  
Javier Sanz Rodrigo
Keyword(s):  
Wind Farm ◽  
Farm Efficiency

Whatever Happened to Efficient Price Signals?

1999 ◽  
Vol 12 (3) ◽  
pp. 40-48
Author(s):  
Kellogg L. Warner ◽  
Henry Y. Yoshimura ◽  
Philip M. Marston
Keyword(s):  
Price Signals ◽  
Efficient Price

Farmer Education and Farm Efficiency

1983 ◽  
Vol 2 (2) ◽  
pp. 304
Author(s):  
Henry M. Levin ◽  
T. Jamison ◽  
Lawrence I. Lau
Keyword(s):  
Farm Efficiency ◽  
Farmer Education

scholarly journals Effect of growth hormone on milk yield and reproductive performance of subfertile Holstein cows during extended lactations

2019 ◽  
Vol 17 (1) ◽  
pp. e0403 ◽  
Author(s):  
Jessica Flores ◽  
José E. García ◽  
Jesús Mellado ◽  
Leticia Gaytán ◽  
Ángeles De Santiago ◽  
...  
Keyword(s):  
Milk Yield ◽  
Reproductive Performance ◽  
Bovine Somatotropin ◽  
Holstein Cows ◽  
Control Group ◽  
Recombinant Bovine Somatotropin ◽  
Northern Mexico ◽  
Lactation Length ◽  
Hot Environment ◽  
Farm Efficiency

The objective of this study was to determine the effects of the administration of recombinant bovine somatotropin (rbST) throughout lactation to high-yielding subfertile (conception > 270 days postpartum) Holstein cows undergoing extended lactations (≥480 d) on milk production and reproductive performance. The study used two large adjacent commercial herds with similar management in a hot area of northern Mexico (25° N). Cows in one herd (n=2341) received a 500-mg dose of rbST every 14 d until dried off, starting 60 days postpartum. The other herd served as control (n=984). Across parity, rbST-treated cows produced 20% greater milk yield than control cows in 305-d lactations. Across parities, milk yield from 305 d postpartum to the end of lactation was 2734 kg higher in rbST-treated cows than control cows. Across parities rbST-treated cows produced 4777 more kg of milk during the entire lactation (mean 605 d) than the control group (mean 572 d). Conception rates (CR) at first service were only 3.2% and 5.9% (p<0.05) for control and rbST-treated cows, respectively. Overall CR was 43.5% and 61.6% (p<0.05) for control and treated cows, respectively. Control cows required 2.4 more (p<0.01) services per conception than rbST-treated cows. It was concluded that in this hot environment, the use of rbST suits dairy producers because it substantially improves both milk yield and reproductive performance in subfertile high-yielding Holstein cows. By markedly increasing lactation length and lactation persistency farm efficiency is greatly improved due to extended herd life.

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