Streamlining the integration of a total production system

2004 ◽  
Vol 24 (2) ◽  
Keyword(s):  
Production System ◽  
Total Production

scholarly journals Backyard Agricultural Production as a Strategy for Strengthening Local Economy: The Case of Chontla and Tempoal, Mexico

2019 ◽  
Vol 11 (19) ◽  
pp. 5400 ◽  
Author(s):  
Fabiola Sánchez-Galván ◽  
Horacio Bautista-Santos ◽  
José Luis Martínez-Flores ◽  
Diana Sánchez-Partida ◽  
Arely del Rocio Ireta-Paredes ◽  
...  
Keyword(s):  
Supply Chain ◽  
Production System ◽  
Agricultural Production ◽  
Economic Value ◽  
Local Economy ◽  
Agricultural Products ◽  
Generic Model ◽  
Total Production ◽  
Improvement Strategy ◽  
Face To Face

In order to define chain strategies for a backyard agricultural production system, this study identified agricultural products produced by high development priority communities with indigenous presence located in the Chontla and Tempoal municipalities in Veracruz, Mexico. The production system was integrated into a generic model decomposing the supply chain into hierarchical components. Data were collected through a face-to-face semistructured questionnaire based on statistical sampling of rural households, backyard producers, intermediaries, retailers, and wholesalers, as well as municipal authorities. The research was carried out from January 2017 to June 2018 and a computational program was designed to analyze the data. As a result, products were identified and their production destinations were quantified. Moreover, it revealed a backyard agricultural supply chain of five echelons with opportunities for improvement in areas such as unstructured agricultural processes and practices, inappropriate product storage and handling, and the lack of production records, and up to three intermediaries that sequentially drove up product cost in regional consumption centers. In this study, 20.9% of total production was destined for sale, 34.8% for self-consumption, and 44.2% was noncommercialized. Nopal, creole pumpkin, coriander, plum, passion fruit, and jobo were products with greater economic value for noncommercialized production. An improvement strategy would be to build inclusive agro-food chains through consolidated centers of backyard agricultural products.

scholarly journals The impact of cow size on cow-calf and postweaning progeny performance in the Nebraska Sandhills

2020 ◽  
Vol 4 (4) ◽  
Author(s):  
Robert L Ziegler ◽  
Jacki A Musgrave ◽  
Tanya L Meyer ◽  
Rick N Funston ◽  
Elliott J Dennis ◽  
...  
Keyword(s):  
Production System ◽  
Body Condition Score ◽  
Average Daily Gain ◽  
Total Production ◽  
Production Environment ◽  
Economic Returns ◽  
Cow Calf ◽  
Calving Season ◽  
The Impact ◽  
Progeny Performance

Abstract Optimizing beef production system efficiency requires an understanding of genetic potential suitable for a given production environment. Therefore, the objective of this retrospective analysis was to determine the influence of cow body weight (BW) adjusted to a common body condition score (BCS) of 5 at weaning-influenced cow-calf performance and postweaning steer and heifer progeny performance. Data were collected at the Gudmundsen Sandhills Laboratory, Whitman, NE, on crossbred, mature cows (n = 1,607) from 2005 to 2017. Cow BCS at calving, prebreeding, and weaning were positively associated (P < 0.01) with greater cow BW. Increasing cow BW was positively associated (P < 0.01) with the percentage of cows that conceived during a 45-d breeding season. For every additional 100-kg increase in cow BW, calf BW increased (P < 0.01) at birth by 2.70 kg and adjusted 205-d weaning BW by 14.76 kg. Calf preweaning average daily gain (ADG) increased (P < 0.01) 0.06 kg/d for every additional 100-kg increase in cow BW. Heifer progeny BW increased (P < 0.01) postweaning with every additional 100-kg increase in dam BW. Dam BW did not influence (P ≥ 0.11) heifer puberty status prior to breeding, overall pregnancy rates, or the percentage of heifers calving in the first 21 d of the calving season. Steer initial feedlot BW increased by 7.20 kg, reimplant BW increased by 10.47 kg, and final BW increased by 10.29 kg (P ≤ 0.01) for every additional 100-kg increase in dam BW. However, steer feedlot ADG was not influenced (P > 0.67) by dam BW. Hot carcass weights of steers were increased (P = 0.01) by 6.48 kg with every additional 100-kg increase in cow BW. In a hypothetical model using the regression coefficients from this study, regardless of pricing method, cow-calf producers maximize the highest amount of profit by selecting smaller cows. Overall, larger-sized cows within this herd and production system of the current study had increased reproductive performance and offspring BW; however, total production output and economic returns would be potentially greater when utilizing smaller-sized cows.

Predicting the Performance of System for the Co-Production of Fischer-Tropsch Synthetic Liquid and Power From Coal

2007 ◽  
Author(s):  
Xun Wang ◽  
Yunhan Xiao
Keyword(s):  
Gas Turbine ◽  
Production System ◽  
Operating Conditions ◽  
Methane Yield ◽  
Chain Growth ◽  
Inlet Temperature ◽  
Co2 Removal ◽  
Total Production ◽  
Fischer Tropsch ◽  
Ft Synthesis

A co-production system based on FT synthesis reactor and gas turbine was simulated and analyzed. Syngas from entrained bed coal gasification was used as feedstock of low temperature slurry phase Fischer-Tropsch reactor. Raw synthetic liquid produced was fractioned and upgraded to diesel, gasoline and LPG. Tail gas composed of unconverted syngas and F-T light component was fed to gas turbine. Supplemental fuel (NG, or refinery mine gas) might be necessary, which was dependent on gas turbine capacity, expander through flow capacity, etc. FT yield information was important to the simulation of this co-production system. A correlation model based on Mobil’s two step pilot plant was applied. This model proposed triple chain-length-dependent chain growth factors and set up correlations among reaction temperature with wax yield, methane yield, and C2-C22 paraffin and olefin yields. Oxygenates in hydrocarbon phase, water phase and vapor phase were also correlated with methane yield. It was suitable for syngas, iron catalyst and slurry bed. It can show the effect of temperature on products’ selectivity and distribution. Deviations of C5+ components yields and distributions with reference data were less than 3%. To light gas components were less than 2%. User models available to predict product yields, distributions, cooperate with other units and do sensitive studies were embedded into Aspen plus simulation. Performance prediction of syngas fired gas turbine was the other key of this system. The increase in mass flow through the turbine affects the match between compressor and turbine operating conditions. The calculation was carried out by GS software developed by Politecnico Di Milano and Princeton University. The simulated performance assumed that the expander operates under choked conditions and turbine inlet temperature equals to NG fired gas turbine. A “F” technology gas turbine was selected to generate power. Various cases were investigated so as to match FT synthesis island, power island and gasification island in co-production systems. Effects of CO2 removal/LPG recovery, co-firing, CH4 content variation were studied. Simulation results indicated that more than 50% of input energy was converted to electricity and FT products. Total yield of gasoline, diesel and LPG was 136g-155g/NM3(CO+H2). At coal feed 21.9kg/s, net electricity exported to grid was higher than 100MW. Total production of diesel and gasoline (and LPG) was 118,000 tons(134,000tons)/Year. Under economic analysis conditions assumed in this paper, co-production system was economic feasible. The after tax profits can research 17 million EURO. Payback times were ranged from 6-7 years.

Application of Production Systems Analysis to Determine Completion Sensitivity on Gas Well Production

1982 ◽  
Vol 104 (2) ◽  
pp. 162-169 ◽  
Author(s):  
J. Mach ◽  
E. A. Proano ◽  
K. E. Brown
Keyword(s):  
Production System ◽  
Production Systems ◽  
Gulf Coast ◽  
High Volume ◽  
Graphical Form ◽  
Total Production ◽  
Well Production ◽  
Controlling Parameter ◽  
System 1 ◽  
Gravel Pack

A completely new approach is presented to show the effect of completion parameters on high volume gas wells typical of the Gulf Coast. The solution can be summarized in graphical form and it will consider the following sections of the total producing system: 1) flow in the porous media, 2) effect of completion, and 3) flow conduit performance. The result is that the controlling parameter in the total production system can be determined. Many wells are capable of producing very high rates but are restricted due to very restricted gravel pack parameters, while wells with very efficient gravel pack completions are tubing-dominated. The procedure presented approaches the completion sensitivity analysis from a complete production system concept.

Production Control Strategy and its Parameters Optimization for a Two-Stage Production System

2013 ◽  
Vol 748 ◽  
pp. 1223-1228
Author(s):  
Hai Xia Wang ◽  
Le Cao ◽  
Ping Yan
Keyword(s):  
Control Strategy ◽  
Production System ◽  
Production Control ◽  
Production Capacity ◽  
Parameters Optimization ◽  
Total Production ◽  
Two Stage ◽  
Threshold Control ◽  
System A ◽  
Standby System

On-off of the standby system is an important factor that influences the performance of the production system. A dual threshold control strategy based on the on-off control of the standby system is proposed for the optimal control of the two-stage production system for which the last stage has stochastic production capacity. A control parameters optimization model is built with the objective of minimizing the total production cost, and a genetic algorithm is adopted to resolve the optimization problem. Finally, an example is taken to validate the effectiveness of the proposed dual threshold control strategy and the parameter optimization algorithm.

scholarly journals Optimal culling strategy in relation to biological and economic efficiency and annualized net revenue in the Japanese Black cow–calf production system

2011 ◽  
Vol 149 (6) ◽  
pp. 783-799 ◽  
Author(s):  
K. OISHI ◽  
T. IBI ◽  
A. K. KAHI ◽  
H. HIROOKA
Keyword(s):  
Economic Efficiency ◽  
Production System ◽  
Production Efficiency ◽  
Least Square ◽  
Total Production ◽  
Mating Trial ◽  
Annual Discount Rate ◽  
Net Revenue ◽  
Cow Calf

SUMMARYThe objective of the present study was to determine the optimal culling strategy in relation to biological and economic efficiency (BE and EE, respectively) and annualized net revenue (AN) in the Japanese Black cow–calf production system with special reference to the beef quality of culled cows. The herd model focused on two ways of mating: one-mating trial system (ONE) and continuous-mating trial system (CON). ONE assumed that heifers that fail to conceive are culled and cows that fail to conceive are culled at weaning of their calves, while CON assumed that mating continues until all females theoretically conceive. Least square means of carcass data of Japanese Black cows collected from a cooperative farm in Japan were used to estimate the carcass price of a cow by parity and Beef Marbling Standard (BMS) number. The simulation, assuming the current production situation in Japan, indicated that sales of culled cows accounted for 0·10–0·20 of total sales and was an important element in total production. Comparisons between ONE and CON showed that production efficiency in the current situation is higher in CON. The BE, EE and AN were higher in CON than in ONE. The two economic indicators were less sensitive to changes in annual discount rate but highly sensitive to changes in female calf price and BMS number of cows, indicating the importance of considering fluctuations in calf price and potential quality of culled cows’ carcasses when estimating the economically optimal parity of culling. The three indicators derived different optimal solutions even in the same mating trial systems, stressing the importance of choice of production indicators when determining the culling strategy and evaluating animal production.

scholarly journals Developing Feeding System and Tecnology Innovation for Intensive and Export-Oriented Goat Production

2019 ◽  
Vol 7 (3) ◽  
pp. 39-51
Author(s):  
S Ginting
Keyword(s):  
Production System ◽  
High Efficiency ◽  
Feeding Strategy ◽  
Central Component ◽  
Total Production ◽  
Feeding System ◽  
Meat Goats ◽  
Feed Management ◽  
Goat Population ◽  
Alternative Feeding

There is large potential for exporting meat goats and so gaining more economic benefit from raising this animal. There are several  constraints faced by the goat producers or  traders in fulfilling the potential demand of the market. Developing a more intensive goat production system is urgently needed in order to increase the capacity of the stock supply while at the same time the goat population is developing to make the system sustainable in the long term. In intensive goat production system feed play a central component  in achieving  the maximum economic efficiency of the production, since under such production system the feed could contributed  up to 70% of the total  production cost. To reach a high  efficiency in  feed utilization for goat production system  there are at least two feeding system that  could be considered. Feeding system and feed management is aldo critical to be developed intensively to be more well adaptive. Feed budget or feeding standard are some alternative feeding approach for intensive goat production system and feeding strategy and feed  technology are important in  optimizing the level of productivity of goats during each phase of its life cycle and production.

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