Designing animal production studies.

2009 ◽  
pp. 327-352 ◽  
Author(s):  
D. I. Bransby ◽  
A. R. Maclaurin
Keyword(s):  
Animal Production ◽  
Production Studies

Animal production studies in Jamaica. IV. The costs of developing and maintaining pangola grass pastures

1964 ◽  
Vol 62 (2) ◽  
pp. 179-186 ◽  
Author(s):  
B. L. Nestel
Keyword(s):  
Indirect Cost ◽  
Direct Cost ◽  
Inverse Relationship ◽  
Indirect Costs ◽  
Animal Production ◽  
Direct And Indirect Costs ◽  
Production Studies ◽  
Total Range ◽  
The Cost

The cost of developing and maintaining pangola grass pastures has been examined under a range of conditions. The direct cost of improving pastures to the stage where they were established as 5–10 acre, fenced, watered units of pangola grass was about £30 per acre. Under favourable conditions this cost could be reduced to £20, but with difficult land or poor techniques the cost could rise to £40 or more per acre. In addition to the direct cost of establishment there was an indirect cost due to land being out of use or stock numbers having to be reduced. This indirect cost appeared to be highest on lands where planting costs were least. It was suggested that there might be an inverse relationship between direct and indirect costs which tended to narrow the total range of establishment costs.

scholarly journals SOME CHARACTERISTICS OF ARTICLES PUBLISHED IN THE NIGERIAN JOURNAL OF ANIMAL PRODUCTION

2021 ◽  
Vol 18 ◽  
pp. 27-33
Author(s):  
S. ADEWOLE
Keyword(s):  
Animal Production ◽  
Poultry Production ◽  
Institutional Affiliation ◽  
Production Studies ◽  
The Core ◽  
Training Background

Using the articles published in the volume 10-14 (1983-1987) of the Nigerian Journal of Animal Production (NJAP), articles profiles and authors' livestock training background were determined. Eighty-one (81) out of 226 were single authored and the balance authored by two or more people. Twelve (12) authors represent the core authors of the journal. This figure appears rather low, from a total of 226 authors. Poultry production is the most authored field in animal production studies; while Nsukka, Zaria, Ibadan and Vom produced the highest number of animal scientists that authored the articles in the volumes 10-14 of NJAP. This group accounts for more than 74% of the institutional affiliation of authors to the journal.

Animal production studies in Jamaica. III. The effect of dam age upon the 210-day weights of calves, and the response of male and female calves to different environments

1964 ◽  
Vol 62 (2) ◽  
pp. 165-177 ◽  
Author(s):  
M. J. Creek ◽  
B. L. Nestel
Keyword(s):  
Animal Production ◽  
Maximum Response ◽  
Male And Female ◽  
Linear Fashion ◽  
Production Studies ◽  
The Mean ◽  
Quadratic Relationship

1. The data used in this study were the estimated 210-day weights of 2351 calves born on eight farms in the years 1958–61. In each year data were only used from herds which recorded at least five calves of each sex in that year. One hundred such herd years were included in the study.2. The mean 210-day difference in weight between male and female calves was 27 lb. 1202 male calves had a mean weight of 380 lb. and 1149 female calves had a mean weight of 353 lb.3. The response of calf weight to age of dam was different in the two sexes. The weight of the female calf was found to increase with dam age in a linear fashion, whereas the response of male calves was best described by a quadratic relationship with the maximum response at a dam age of 8 years.

Animal production studies in Jamaica: I. Introduction

1964 ◽  
Vol 62 (2) ◽  
pp. 151-155 ◽  
Author(s):  
B. L. Nestel ◽  
M. J. Creek
Keyword(s):  
Animal Production ◽  
Small Farms ◽  
Production Studies ◽  
Breeding Programmes

A descriptive background is given to a group of beef farms in Jamaica on which a series of grass and animal production studies were carried out using technical and economical data derived from those farms over a 5-year period. During this time the farms co-operated in keeping standardized costaccounts and recording detailed outputs from farms and from improved and unimproved lands within those farms. Studies were made of the economics of pasture improvement and also of improvement in husbandry and breeding programmes. The possible value of the results to the small farms in the area is discussed.

Animal production studies in Jamaica. II. The development and evaluation of a field programme of calf weighing

1964 ◽  
Vol 62 (2) ◽  
pp. 157-164 ◽  
Author(s):  
M. J. Creek
Keyword(s):  
Animal Production ◽  
Grazing Management ◽  
Early Age ◽  
Production Studies ◽  
Weaning Age

1. The age of 210 days was selected for calf weight standardization. In general this is a preweaning weight under prevailing Jamaican conditions, and it represents a compromise between a very early age (90–120 days) which would reflect closely the milking ability of the dam, and the actual weaning age (approximately 260 days) when the grazing management of the herd would constitute a major unpredictable variable.2. Either one or two weighings taken between the fourth and the ninth months of life was used to standardize calf weights to 210 days of age. In either instance for groups of calves, a mean estimate was derived which was very close to the actual mean 210-day weight, and which was suitable for data relating to groups of animals.

Animal production studies in Jamaica. V. Live-weight production from pangola grass pastures used for rearing and fattening beef cattle and the economic implications of the yields

1964 ◽  
Vol 62 (2) ◽  
pp. 187-197 ◽  
Author(s):  
B. L. Nestel ◽  
M. J. Creek
Keyword(s):  
Beef Cattle ◽  
Significant Relationship ◽  
Live Weight ◽  
Animal Production ◽  
Economic Implications ◽  
Production Studies ◽  
Cattle Farms

Yields from improved (pangola) and unimproved pastures on a group of beef cattle farms have been recorded during the years 1958–62. On these farms it was shown that there was a highly significant relationship between the percentage of improved grassland and the live-weight output per acre of the whole farm. This relationship indicated that the output of unimproved land on these farms was of the order of 45 lb. per acre, and that of improved (pangola) pasture 260 lb. per acre.

scholarly journals FREQUENCY AND INTENSITY OF GRAZING AND THEIR EFFECTS ON PASTURE PRODUCTION

1970 ◽  
pp. 137-144
Author(s):  
R.W. Brougham
Keyword(s):  
Dry Matter ◽  
Unit Area ◽  
Animal Production ◽  
Pasture Management ◽  
High Quality ◽  
Pasture Production ◽  
Production Studies ◽  
Matter Production ◽  
The World ◽  
Species Productivity

IN New Zealand, as in a number of other pastoral areas (A the world, controversy has surrounded the value of pasture management studies using indices such as dry matter production as an aid to predicting possible animal production levels per unit area. This stems from the fact that investigators studying the significance of different frequencies and intensities of grazing on pasture production and species productivity have been able to demonstrate very large differences in herbage production levels, whereas animal production studies using parameters of animal production as indices in these same environments have frequently failed to reflect such large differences. This is in spite of the fact that the extra production obtained in the pasture studies is frequently of high quality and is a very desirable feed for livestock.

ECONOMIC AND ENVIRONMENTAL SUSTAINABILITY OF AGRICULTURAL HOLDINGS WITHOUT ANIMAL PRODUCTION

2017 ◽  
Vol XIX (4) ◽  
pp. 124-129
Author(s):  
Zofia Kołoszko-Chomentowska
Keyword(s):  
Environmental Sustainability ◽  
Vegetation Cover ◽  
Ecological Indicators ◽  
Animal Production ◽  
Economic Sustainability ◽  
Organic Substances ◽  
Production Studies ◽  
Economic Indexes ◽  
Means Of Production

This article undertakes to evaluate the economic and environmental sustainability of agricultural holdings not engaged in animal production. Studies covered agricultural holdings in the Podlaskie voivodeship included in the FADN system in 2014. The evaluation accounts for selected agri-ecological indicators, supplemented by material pressure indexes and economic indexes (profitability of land and labour). Obtained results indicate that environmental sustainability conditions were met only with regard to the vegetation cover index but were not met with regard to the remaining indexes (share of permanent grasslands, crop structure, balance of organic substances). Holdings without animals exerted lesser pressure on the environment than holdings engaged in animal production from the perspective of consumption of means of production. Both groups of holdings did not achieve economic sustainability. Income parity in 2014 amounted to 0.73 for holdings without animals and 0.84 for holdings with animal productions.

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