Author: Publisher:
ISBN: 9780642941817
Category : Beef cattle
Languages : en
Pages : 80
Book Description
A Computer Model Simulating Extensive Beef Cattle Production Systems
Author: Publisher:
ISBN: 9780642941817
Category : Beef cattle
Languages : en
Pages : 80
Book Description
Simulation Of Beef Cattle Production Systems And Its Use In Economic Analysis
Author: Thomas H SpreenPublisher: CRC Press
ISBN: 1000239616
Category : Science
Languages : en
Pages : 269
Book Description
Economic analysis of beef cattle production has been limited by the inability to fully describe the underlying production process. Except for confined feeding of cattle, beef cattle production is the process of growing cattle who consume forages. The animal and the forage possess attributes of both factors and products of production. The production of forage constitutes one production process, animal growth is another production process, and reproduction by female animals is a third production process. Cattle production involves all three processes in such a manner that each influences the outcome of the other. Each process is itself complex and analysis is further complicated when all three are considered simultaneously.
Computer Simulation of Beef Cattle Production Systems in the Llanos of Colombia
Author: Joel Martin LevinePublisher:
ISBN:
Category : Beef cattle
Languages : en
Pages : 570
Book Description
Computer Simulation of Beef Cattle Production Systems in the Llanos of Columbia
Author: Joel Martin LevinePublisher:
ISBN:
Category : Beef cattle
Languages : en
Pages : 570
Book Description
A simulation model capable of execution on a programmable calculator was developed to study voluntary intake, liveweight change, and fertility of grade Zebu cows in the Llanos of Colombia. Organic nitrogen in the diet and meta bolic weight were used to predict intake; age, liveweight, and energy concentration were the driving variables for the maintenance prediction equation. Energy concentration was calculated as a function of crude protein and digestible organic matter, and liveweight change was predicted as a function of intake, maintenance, liveweight, and energy concentration. Multiplicative correction factors were fitted from data obtained from cow-calf experiments to adjust intake and maintenance for the effects of burning the native savanna, compensatory gain, mineral deficiency, and lactation and gestation. The correction factors were .89 for intake after burning the native savanna, 1.05 and .95 for intake and maintenance during compensatory gain, and .90 for reduced intake due to mineral deficiency. Correction factors for physiological status were 1.20 for intake during early and late lactation, and 1.40, 1.32, and 1.05 for maintenance during early lactation, late lactation, and late gestation, respectively. The correction factors for burning and compensatory gain were fitted against data from dry cows of Herds 4-5 of the Herd Systems Experiment (HSE) and yielded a Pearsonian correlation coefficient of .95 (p
Simulation Of Beef Cattle Production Systems And Its Use In Economic Analysis
Author: Thomas H SpreenPublisher: CRC Press
ISBN: 100031149X
Category : Science
Languages : en
Pages : 283
Book Description
Economic analysis of beef cattle production has been limited by the inability to fully describe the underlying production process. Except for confined feeding of cattle, beef cattle production is the process of growing cattle who consume forages. The animal and the forage possess attributes of both factors and products of production. The production of forage constitutes one production process, animal growth is another production process, and reproduction by female animals is a third production process. Cattle production involves all three processes in such a manner that each influences the outcome of the other. Each process is itself complex and analysis is further complicated when all three are considered simultaneously.
Evaluation of Genotype-environment Interactions in Beef Cattle Production Systems Using a Computer Simulation Model
Author: Jerome Frank BakerPublisher:
ISBN:
Category : Beef cattle
Languages : en
Pages : 135
Book Description
Evaluation of genotype environment interactions in beef cattle production systems using a computer simulation model.
The Application of Computer Simulation and Mathematical Modeling Techniques in Feedlot Beef Cattle Production and Research
Author: Robert William BrennanPublisher:
ISBN:
Category :
Languages : en
Pages : 288
Book Description
The Development of a Simulation Model and Its Use in the Evaluation of Cattle Production Systems
Author: Hava E. KahnModelling of Extensive Livestock Production Systems
Author: N. de RidderPublisher: ILRI (aka ILCA and ILRAD)
ISBN:
Category :
Languages : en
Pages : 366
Book Description
ILCA's policy towards modelling in the framework of livestock systems research; models and the analysis of productivity in extensive livestock systems in Israel; prediction of actual primary production under nitrogen limitation; behavioural aspects of intake at pasture in ruminats; prediction of feed intake in ruminats; relationships between chemical composition and voluntary intake of feeds by sheep and cattle; the effect of breeding season duration on production and feed consumption in grazing beef cattle in the south of Israel; adaptation of the Kahan model for a mixed farming system in southeastern Asia; appraisal of the ILCA cattle herd dynamics model using data from pastoral systems in mali and kenya; moddeling pastoral livestock production: problems and prospect; analysis of management impact in semi-arid agropastoral systems; modelling economic outcomes of livestock production systems; selection of sheep husbandy techologies under single and multiple goal constraints; types, purposes and users of models; problems related do intake.
Author: Heraldo O. Fujita