Author: J. A. M. van Arendonk (Scientifique)Publisher:
ISBN:
Category :
Languages : en
Pages : 126
Book Description
Studies on the Replacement Policies in Dairy Cattle
Author: J. A. M. van Arendonk (Scientifique)Publisher:
ISBN:
Category :
Languages : en
Pages : 126
Book Description
Studies on the Replacement Policies in Dairy Cattle
Author: Johan A. M. ArendonkPublisher:
ISBN:
Category : Dairy cattle
Languages : en
Pages : 126
Book Description
Dairy Cattle Replacement Under Changing Agri-environmental Policies
Author: Publisher:
ISBN: 9789464479904
Category :
Languages : en
Pages : 0
Book Description
In conclusion, there is a need to develop more strategic approaches to dairy cow culling and replacement to meet the challenges of evolving agri-environmental policies that include heifer rearing linked with replacement of cows. The findings of this thesis add research insights to develop more sustainable and profitable dairy farming systems in the future.
Optimum Dairy Cow Replacement Policies to Maximize Income Over Feed Cost
Author: Richard Walker RundellPublisher:
ISBN:
Category : Dairy cattle
Languages : en
Pages : 246
Book Description
Simulation of a dairy herd over a period of 15 years was used to examine replacement strategies among six operationally practical systems of culling cows which whould maximize income over feed costs. The strategies or criteria used to remove the lower ranking cows to a relatively constant herd size were: (1) Mature Equivalent (M.E.) milk production, (2) M.E. gross milk income, (3) actual milk production, (4) actual gross income, (5) income over feed cost, and (6) present value of expected gross income of cow and her subsequent replacements. Two each of prices of milk, fat differential, feed, and operational costs totaled 2 4 x 6 x 2 replications per trial or 192 replications. The following were treated as stochastic variables: (a) variation in milk production and milkfat percentage between cows and between lactations of the same cow, (b) chance of a calf being a heifer or bull, (c) chance of involuntary death or removal of cows and youngstock, and (d) chance of month of the year of involuntary removals. The mean and variance of the base herd approximated the average Michigan DHIA Holstein population in 1966. The sire value, approximating the best bulls used in A.I. was identical for any given year through all strategies and replications, but improved over time at the rate of 130 1b milk per year. Culls or cows removed because of low in each respective strategy were removed at the most profitable point to cull in their respective lactations by equating the milk income of the marginal month with the sun of the month's feed costs and monthly operational charges. Practical use of this simple method of determining when to cull cows within a lactation was demonstrated. A complete factorial design to analyze the generates data showed no significant differences between strategies under alternative combinations of prices in average income including salvage over feed cost per cow discounted to the present. This income was affected by the level of milk price (P
Optimal Dairy Cow Replacement Policies
Author: Harald Birger GiaeverPublisher:
ISBN:
Category : Dairy cattle
Languages : en
Pages : 732
Book Description
The Replacement Problem
Author: Thomas F. CooleyPublisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
We construct a vintage capital model of economic growth in which the decision to replace old technologies with new ones is modeled explicitly. Depreciation in this environment is an economic, not a physical concept. We describe the balanced growth paths and the transitional dynamics of this economy. We illustrate the importance of vintage capital by analyzing the response of the economy to fiscal policies designed to stimulate investment in new technologies. A revised version of this paper is published in the Journal of Monetary Economics, v. 40, no. 3(December 1997):457-499.
Culling and Replacement Policies for Dairy Cattle (from 1967)
Author: Commonwealth Bureau of Dairy Science and TechnologyPublisher:
ISBN:
Category :
Languages : en
Pages : 35
Book Description
Optimal Dairy Cow Replacement Policies
Author: H. B. GiaeverThe Dairy Cow Replacement Problem and the Determination of Optimal Replacement Policies
Author: Blair Joseph SmithAn Economic Analysis of Alternative Dairy Herd Replacement Policies on Grade A Dairy Farms in the Knoxville Milkshed
Author: Thomas William LittlePublisher:
ISBN:
Category :
Languages : en
Pages : 124
Book Description