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| Registros recuperados: 35 | |
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| Brennan, John P.; Martin, Peter J.; Mullen, John D.. |
| The Wagga wheat breeding program has been operating for over 100 years. In that time, it has released a flow of new wheat varieties for wheat growers in south-eastern Australia. Those varieties have led to increases in both yields and grain quality. The average annual rate of yield improvement in NSW has been 3.2% compared to the average for Australia of 2.4% with a significant proportion of these productivity gains arising from new varieties. In this analysis, the investment in that program from 1980 to 2003 has been evaluated. Given the lags inherent in wheat breeding investments, the benefits from those investments are being measured from 1993 to 2020. The broad structure of the program has remained relatively stable for most of the period since 1980.... |
| Tipo: Report |
Palavras-chave: Research and Development/Tech Change/Emerging Technologies. |
| Ano: 2004 |
URL: http://purl.umn.edu/27997 |
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| Brennan, John P.; Godyn, Dirk L.; Johnston, Brian G.. |
| Estimation of the benefits of research using changes in producer and consumer surplus following a research-induced shift in the supply curve provides a useful framework for the analysis of new wheat varieties. However, the framework assumes an homogeneous product, which is not the case for wheat where there are changes in quality as a result of research. This aspect is particularly important where there is a trade-off between quality and yield, as in the case of a higher-yielding, but lower-quality wheat variety. The aim of this paper is to incorporate these quality aspects into an analysis based on a partial equilibrium framework by separating the wheat market into segments based on wheat quality. A change in the type of wheat produced can then be... |
| Tipo: Journal Article |
Palavras-chave: Crop Production/Industries. |
| Ano: 1989 |
URL: http://purl.umn.edu/12447 |
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| Brennan, John P.. |
| Wheat genetic materials developed from research at the International Maize and Wheat Improvement Center (CIMMYT) in Mexico for developing countries have provided spillover benefits to Australia. Varieties developed from those genetic materials have resulted in yield increases in Australia. While the initial impact came through the introduction of higher-yielding semi-dwarf wheat crops, those impacts have continued in the post-semidwarf period. CIMMYT’s success in developing countries has also reduced the world price for wheat. While the lower prices affect returns in Australia, the increased yields in Australia from the CIMMYT spillovers from both the semi-dwarfs and the postsemidwarf phases have provided benefits to Australia averaging A $30 million per... |
| Tipo: Article |
Palavras-chave: R&D evaluation; R&D policy; Spillovers; Technology adoption; Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies. |
| Ano: 2007 |
URL: http://purl.umn.edu/118519 |
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| Brennan, John P.; Godden, David P.; Smale, Melinda; Meng, Erika C.H.. |
| As part of an ACIAR-funded project on genetic diversity in wheat in Australia and China, Australian wheat breeders were surveyed to assess the importance of genetic diversity to breeders. This paper reports the findings of that survey, and identifies the key issues that concern wheat breeders. The issues addressed include the breeders’ attitude to diversity and the diversity available in their current gene pool. The sources of materials that breeders use to maintain and/or increase diversity in their programs are identified, and ways in which diversity influences breeding decisions are also examined. More importantly from the policy view point, survey responses identify changes over time in the environment in which breeders operate that affect the extent... |
| Tipo: Presentation |
Palavras-chave: Genetic/diversity/wheat/breeder/survey; Crop Production/Industries. |
| Ano: 1999 |
URL: http://purl.umn.edu/123776 |
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| Brennan, John P.; Bialowas, Adam. |
| A study was made of the changes from 1965 to 1997 in wheat varieties grown in selected shires representing farming systems across NSW. The eight shires examined were Wagga, Temora, Cowra, Carrathool, Lachlan, Coonabarabran, Gunnedah and Narrabri. In each shire, approximately 8-10 varieties were grown each year. Generally, three of those varieties were grown on a substantial proportion of the area; the minor varieties were either new varieties in the process of being built up to their peak adoption or older varieties in the stage of being replaced. In southern shires, there has been a tendency to reduce the number of varieties grown, while in the northern shires the number of varieties grown has increased since 1965. The progress of breeders in developing... |
| Tipo: Report |
Palavras-chave: Production Economics. |
| Ano: 2001 |
URL: http://purl.umn.edu/28003 |
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| Brennan, John P.; Thorne, Fiona S.; Kelly, Paul W.; Murray, Gordon M.. |
| In determining the economic impact of a possible outbreak of the quarantinable wheat disease Karnal Bunt, an examination was made of the detailed components of the costs involved. The costs were classified as: (a) Direct costs (yield and quality losses); (b) Reaction costs (export bans, quality down-grading, seed industry costs); and (c) Control costs (quarantine zones, fungicides, spore destruction). The relative importance of each of these cost components is measured for a hypothetical outbreak of Karnal Bunt in the European Union, as a means of ensuring that the policy responses to such an outbreak are appropriate considering the costs involved. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Disease; Quarantine; Cost; Wheat; Agricultural and Food Policy; Crop Production/Industries. |
| Ano: 2004 |
URL: http://purl.umn.edu/58382 |
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| Singh, Rajinder Pal; Brennan, John P.; Farrell, Tim; Williams, Robert L.; Rienke, Russell; Lewin, Laurie; Mullen, John D.. |
| The occurrence of low night temperatures during reproductive development is one of the factors most limiting rice yields in southern Australia. Yield losses due to cold temperature are the result of incomplete pollen formation and subsequent floret sterility. Researchers have found that in 75% of years, rice farmers suffer losses between 0.5 and 2.5 t/ha. Research is being undertaken to identify overseas rice varieties, that are cold tolerant under the local weather conditions and by using those genotypes as parent material, develop cold tolerance varieties of rice. A yield simulation model was used to measure reduction in losses due to cold at different minimum threshold temperatures, while the SAMBOY Rice model was used to measure the costs and returns... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Rice; Cold; Yield loss; Breeding; Crop Production/Industries. |
| Ano: 2003 |
URL: http://purl.umn.edu/57925 |
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| Brennan, John P.; Singh, Rajinder Pal; Singh, Inder Pal. |
| Researchers have abundant technical opportunities to select various options for improvement of nutritional characteristics of feed grains. Choosing between those opportunities is a difficult issue for research funding organisations. In this paper, an attempt to address those research resource allocation issues is reported. The approach to use in analysing improvements in the feed quality of grains is discussed. By defining the problem as a cost reduction for the livestock industries, the impact of improvements in grain nutrition can be defined by their impact on the least-cost feed rations for different livestock categories. Using that approach, the benefits of improved feeds can be evaluated, and research priorities can be determined on the basis of which... |
| Tipo: Presentation |
Palavras-chave: Feed grain; Nutrition; Value; Research; Crop Production/Industries. |
| Ano: 1999 |
URL: http://purl.umn.edu/123789 |
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| Brennan, John P.; Singh, Rajinder Pal; Singh, Inder Pal. |
| A comprehensive set of potential new feed grains for Australia was evaluated to help establish the options with the highest priorities for research. The cost-reducing impacts of the different options were analysed using a linear-programming model that determined the least-cost feed rations for the different livestock industries. Economic welfare analysis was then used to estimate the size and distribution of the benefits of research from the feed grains quality-improving research. The analysis revealed that there are only limited opportunities to improve the productivity and competitiveness of Australia’s livestock industries by improving the nutritional characteristics of feed grains. |
| Tipo: Article |
Palavras-chave: Crop Production/Industries. |
| Ano: 2002 |
URL: http://purl.umn.edu/118595 |
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| Brennan, John P.; Singh, Rajinder Pal; Bialowas, Adam. |
| Feed grains researchers have abundant technical opportunities to select various options for improvement of nutritional characteristics of feed grains. Choosing between those opportunities is a difficult issue for research funding organisations. In this paper, efforts to address the relative economic benefits from the different options for feed grains nutritional improvement are reported. The economic benefits arising from nutritional improvements in various feed grains are examined and compared to the benefits from increasing yields of the feed grains rather than improving their nutritional value. The results of the analysis of these options are presented in an economic surplus framework that enables the major beneficiaries and the relative gains for the... |
| Tipo: Presentation |
Palavras-chave: Research; Feed grain; Nutrition; Value; Crop Production/Industries; Food Consumption/Nutrition/Food Safety. |
| Ano: 2000 |
URL: http://purl.umn.edu/123608 |
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| Islam, Q.; Mullen, John D.; Brennan, John P.; Li, G.D.; Helyar, K.R.; Jones, Randall E.. |
| Acid and acidifying soils occur extensively in Australia. Currently, some 90 million hectares of agricultural land in Australia is considered to be acidic and around 35 million hectares are considered to be highly acidic which is both a serious agricultural and environmental problem. The nature, impact, and causes of soil acidification vary across Australia, as do farming systems and the institutional and socioeconomic issues relating to land management. In high-rainfall areas of south-eastern Australia, managing acid soils is particularly difficult in permanent pasture systems. In this paper, an economic analysis is made of the results of a long-term trial (MASTER – Managing Acid Soils Through Efficient Rotations) aimed at developing a sustainable... |
| Tipo: Presentation |
Palavras-chave: Soil acidity/pH/amelioration/farming/rotations/gross margin/stocking rates; Crop Production/Industries; Farm Management. |
| Ano: 1999 |
URL: http://purl.umn.edu/123818 |
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| Registros recuperados: 35 | |
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