scholarly journals Simulation of a Japanese Cow-calf-feedlot Production System, with a Special Reference to the Effect of Genetic Mature Cow Size on Production Efficiency

1989 ◽  
Vol 60 (10) ◽  
pp. 933-939
Author(s):  
Hiroyuki HIROOKA ◽  
Yukio YAMADA
Keyword(s):  
Special Reference ◽  
Production System ◽  
Production Efficiency ◽  
Cow Calf

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 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.

Study on Carrying out Kanban Production System in a Engine Assembly Workshop

2012 ◽  
Vol 424-425 ◽  
pp. 330-333
Author(s):  
Yan Xiao ◽  
Yun Yun Li ◽  
Qiu Hong Jia
Keyword(s):  
Survey Data ◽  
Production System ◽  
Production Efficiency ◽  
Field Survey ◽  
Overall Design ◽  
Assembly Plant

Combined with the field survey data, this paper firstly analyzed the production status of an engine assembly plant, identified the problems reduced production efficiency; and then proposed re-introduction of Kanban production system to help enterprises overcome the present impasse. This paper focused on describing the import plan, the overall design and executing conditions of Kanban production system，which to be a reference example for other enterprises who want to adopt Kanban production system

63 Evaluation of Warm-Season Annual Baleage in a Cow/Calf Production System.

2018 ◽  
Vol 96 (suppl_1) ◽  
pp. 33-34
Author(s):  
M S Hargaden ◽  
M K Mullenix ◽  
C G Prevatt ◽  
R W Peacock ◽  
S Moisa ◽  
...  
Keyword(s):  
Production System ◽  
Warm Season ◽  
Cow Calf

The Production System Automatic Layout Based on Simulation

2013 ◽  
Vol 819 ◽  
pp. 393-397
Author(s):  
Chao Lv ◽  
Shuang Liu ◽  
Shi Ming Wang ◽  
Bei Cai
Keyword(s):  
Production System ◽  
Production Efficiency ◽  
Optimal Solution ◽  
Operation Time ◽  
Simulation Software ◽  
Main Function ◽  
Automatic Layout ◽  
And Function ◽  
Plant Simulation ◽  
System Layout

The U-Shaped layout and function of production system is studied, the purpose is showing how the layouts and their main function influence each other, thus to provide enlightenments and references to improve the design of the production system layout. The simple automatic arrangement system is presented based on Plant Simulation software and focused on an equipment layout problem. The automatic layout system is an automatic layout system of workshop layout according to data; adopt the method of simulation modeling combined with optimization of the workshop layout. According to the different optimization objectives, the user can get a different optimal solution. Through simulation, we can get the default layout of the carrying amount, size and arrangement, combined with the enterprise's actual situation. The appropriate adjustments and production efficiency of production workshop are improved, and the operation time of manual modeling is shortened.

scholarly journals Evaluation of greenhouse gas emissions from hog manure application in a Canadian cow–calf production system using whole-farm models

2016 ◽  
Vol 56 (10) ◽  
pp. 1722 ◽  
Author(s):  
Aklilu W. Alemu ◽  
Kim H. Ominski ◽  
Mario Tenuta ◽  
Brian D. Amiro ◽  
Ermias Kebreab
Keyword(s):  
Production System ◽  
Ghg Emissions ◽  
Split Application ◽  
Single Application ◽  
Manure Application ◽  
Farm Productivity ◽  
Hog Manure ◽  
Enteric Methane ◽  
Cow Calf ◽  
The Impact

The development of beneficial management practices is a key strategy to reduce greenhouse gas (GHG) emissions from animal agriculture. The objective of the present study was to evaluate the impact of time and amount of hog manure application on farm productivity and GHG emissions from a cow–calf production system using two whole-farm models. Detailed model inputs (climate, soil and manure properties, farm operation data) were collected from a 3-year field study that evaluated the following three treatments: no application of hog manure on grassland (baseline); a single application of hog manure on grassland in spring (single); and two applications of hog manure as fall and spring (split). All three treatments were simulated in a representative cow–calf production system at the farm-gate using the following whole-farm models: a Coupled Components Model (CCM) that used existing farm component models and the Integrated Farm System Model (IFSM). Annual GHG intensities for the baseline scenario were 17.7 kg CO2-eq/kg liveweight for CCM and 18.1 kg CO2-eq/kg liveweight for IFSM. Of the total farm GHG emissions, 73–77% were from enteric methane production. The application of hog manure on grassland showed a mean emission increase of 7.8 and 8.4 kg CO2-eq/kg liveweight above the baseline for the single and split scenarios, respectively. For the manured scenarios, farm GHG emissions were mainly from enteric methane (47–54%) and soil nitrous oxide (33–41%). Emission estimates from the different GHG sources in the farm varied between models for the single and split application scenarios. Although farm productivity was 3–4% higher in the split than in single application (0.14 t liveweight/ha), the environmental advantage of applying manure in a single or split application was not consistent between models for farm emission intensity. Further component and whole-farm assessments are required to fully understand the impact of timing and the amount of livestock manure application on GHG emissions from beef production systems.

scholarly journals A SUSTAINABLE PRODUCTION SYSTEM FOR TOMATOES USING A CONTAINERIZED GRADIENT CONCEPT.

HortScience ◽  
1992 ◽  
Vol 27 (6) ◽  
pp. 586f-586
Author(s):  
C. M. Geraldson
Keyword(s):  
Production System ◽  
Production Efficiency ◽  
Moisture Gradient ◽  
Sustainable Production ◽  
Pollution Potential ◽  
Rigid Plastic ◽  
Plastic Container ◽  
Liming Material ◽  
The Media ◽  
Micro Irrigation

The purpose of this study was to evaluate the commerical feasibility of a containerized gradient concept with relevance to water requirement, pollution potential, and production efficiency. Basic components included one-half cu ft of media/plant with 2 plants/rigid plastic container. Phosphorous, liming material and micronutrients were mixed in the media and the N-K was banded on the surface at both ends of the container which was protected by a plastic cover. Intermittent micro-irrigation was used to maintain either a lateral or vertical nutrient/moisture gradient. Variations in the media, the size and shape of the container, and the frequency and time of water applications were included in the evaluations. In the spring of 1991, 65 gallons of water was utilized to produce 22.9 lbs of marketable tomatoes/plant. Leaching was insignificant and the water required on an acre basis was projected as 4.8 acre inches with a 2000 plant population. The results indicate that the containerized gradient concept is potentially feasible as a sustainable production system.

scholarly journals A survey in the design and control of automated guided vehicle systems

2019 ◽  
Vol 12 (2) ◽  
pp. 41-49
Author(s):  
A. P. Vancea ◽  
I. Orha
Keyword(s):  
Production System ◽  
Production Efficiency ◽  
Ground Level ◽  
Small Scale ◽  
Automated Guided Vehicle ◽  
Total Production ◽  
Automatic Guided Vehicles ◽  
Small Scale Industry ◽  
Vehicle Systems ◽  
And Control

Abstract Automatic guided vehicles (AGVs) play an important role in the small-scale industry as well as the largescale industry in handling materials inside factories from one place to another. In the last days, the materials to be handled are more numerous and as production and demand increase, it strongly influences the transport of materials in desperate need of a vehicle to distribute, position the materials within the industry. AGVs are generally installed with wires at ground level and signals are transmitted through them to be controlled. Due to the emergence of the AGV, the workload of the human being gradually decreased and the production efficiency increased. Thus, the need for an AGV has become more technologically important in the advanced robotic world. Normally, these systems are integrated into a global production system, where is a need to make direct changes in the design and planning of the floor store to get most of them. But in the rapidly changing production system and the adaptable floor store, the implementation of AGV has become very important and difficult, because it depends on many systems, such as wires, frequency, total production, etc. Therefore, it is necessary to develop an independent AGV, which can operate on its own and make decisions based on changes in the environment.

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