World Wheat Research Articles

Assessing the Impact of State Trading Enterprises

State Trading Enterprises (STEs) are periodically subject to intense scrutiny for their suspected negative impact on the international trade of agricultural goods. Sound empirical assessment of the impact of STEs is scant, in spite of the ongoing and intense debate over their impacts, especially in the context of reform at the WTO. In this paper we use the case of world wheat trade between 2212 country pairs over a 35 year span to assess STE impacts. Using a gravity model, we estimate a Poisson pseudo maximum likelihood fixed effects model of world wheat trade to assess the role of both the presence of STEs and STEs with monopoly power. Further addressing estimation challenges, we also estimate zero-inflated versions of Poisson and Negative Binomial Regression models. We find consistent support for the hypothesis that monopoly export STEs are associated with higher exports for their host country. Similarly, import STEs appear to inhibit wheat imports, suggesting a protectionist function.

Haplotype analysis of molecular markers linked to stem rust resistance genes in Ethiopian improved durum wheat varieties and tetraploid wheat landraces

The recent emergence of wheat stem rust race Ug99 (TTKSK) and related strains threaten Ethiopian as well as world wheat production because they overcome widely used resistance genes that had been effective for many years. The major cause which aggravates the ineffectiveness of Ethiopian wheat varieties against stem rust is the narrow genetic base on which the breeding for resistance has been founded, however, little is known about the resistance genotypes of Ethiopian durum wheat varieties and tetraploid wheat landraces. The objective of the study was to identify stem rust resistance genes that are present in the Ethiopian tetraploid wheat landraces and improved durum wheat varieties using molecular markers and assess which genes are effective for current Ethiopian stem rust races of Puccinia graminis f. sp. tritici including Ug99. The investigated 58 tetraploid wheat accessions consisted of 32 (Triticum durum s.l. incl. Triticum aethiopicum Jakubz., Triticum polonicum) landraces and 22 registered T. durum varieties released in Ethiopia between 1966 and 2009 and four T. durum varieties from ICARDA. A total of 17 molecular markers (SSR, EST and InDel) linked or diagnostic for stem rust resistance genes Sr2, Sr13, Sr22 and Sr35 were used for genotyping. Haplotype analysis indicated that only few of the Ethiopian durum wheat varieties carried Sr13. The resistant variety ‘Sebatel’ showed a haplotype for Sr2 and Sr22 and variety ‘Boohai’ for Sr22, however further evaluation is needed for the diagnostic value of these haplotypes. This study is the first report on the presence of stem rust resistance (Sr) genes in Ethiopian durum wheat varieties and tetraploid wheat landraces based on linked or associated molecular markers. Thus it might help in the identification of varieties carrying resistant alleles that provide valuable genetic material for the development of new improved varieties in further breeding programmes.

Wheat Production in the High Winter Stress Climate of the Great Plains of North America—An Experiment in Crop Adaptation

ABSTRACTThe traditional winter wheat (Triticum aestivum L.) production area on the North American Great Plains extended as far north as southern Alberta, Canada. This paper reviews a research and development program initiated with the objective of expanding production north and east into higher winter stress areas of the Canadian prairies. Winter survival was considered the main limitation to production in this region. However, the widespread adoption of no‐till seeding into standing stubble for snow trapping has proven to be a successful method of overwintering wheat if cold hardy cultivars are grown using recommended management practices. Plant breeding improvements have increased production potential and winter wheat has become western Canada's third largest wheat class. Average commercial yields of 149, 125, and 118% of spring wheat in Manitoba, Saskatchewan, and Alberta, respectively, have demonstrated the high yield potential that can be realized while employing environmentally sustainable crop management practices. In light of current environmental concerns, changing weather patterns, diminishing world wheat reserves, and an ever increasing global population to feed, one would assume that winter wheat production in western Canada would be widely embraced. However, marketing obstacles and difficulties inserting winter wheat into rotations, both of which have a direct influence on farmers’ net returns, remain to be overcome for this potential to be fully realized.

Phenotyping for drought adaptation in wheat using physiological traits.

Wheat (Triticum spp) is one of the first domesticated food crops. It represents the first source of calories (after rice) and an important source of proteins in developing countries. As a result of the Green Revolution, wheat yield sharply increased due to the use of improved varieties, irrigation, pesticides, and fertilizers. The rate of increase in world wheat production, however, slowed after 1980, except in China, India, and Pakistan. Being adapted to a wide range of moisture conditions, wheat is grown on more land area worldwide than any other crop, including in drought prone areas. In these marginal rain-fed environments where at least 60 m ha of wheat is grown, amount and distribution of rainfall are the predominant factors influencing yield variability. Intensive work has been carried out in the area of drought adaptation over the last decades. Breeding strategies for drought tolerance improvement include: definition of the target environment, choice and characterization of the testing environment, water stress management and characterization, and use of phenotyping traits with high heritability. The use of integrative traits, facilitated by the development and application of new technologies (thermal imaging, spectral reflectance, stable isotopes) is facilitating high throughput phenotyping and indirect selection, consequently favoring yield improvement in drought prone environments.

Pyricularia blast - a threat to wheat cultivation

Wheat blast disease caused by Pyricularia grisea (telemorph Magnaporthe grisea) has become a serious restriction on increasing the area and production of the crop, especially in the tropical parts of the Southern Cone Region of South America. First identified in 1985 in the State of Paraná in Brazil, it has become an endemic disease in the low lying Santa Cruz region of Bolivia, south and south-eastern Paraguay, and central and southern Brazil in recent years. Severe infections have also been observed in the summer planted wheat crop in north-eastern Argentina. So far, only sporadic infections have been seen in Uruguay, especially during the wet and warm years. Spike infection (often confused with Fusarium head blight infection) is the most notable symptom of the disease and capable of causing over 40% production losses. However, under severe infection, the loss of production can be almost complete in susceptible varieties. Wheat blast is mainly a spike disease but can also produce lesions on all the above ground parts of the plant under certain conditions. Depending upon the point of the infection on the rachis, the disease can kill the spike partially or fully. The infected portion of the spike dries out without producing any grain which can be visibly distinguished from the healthy portion. While virulence diversity in the fungus has been reported in the literature and is under further exploration, genetic resistance in the host species has been more difficult to identify. Earlier, Brazilian cultivars such as BH 1146, CNT 8, several IAC and OCEPAR selections were credited as demonstrating different levels of field resistance, but this was not confirmed under artificial inoculation studies. However, other cultivars such as BR18, IPR 85, CD 113, have shown moderate levels of resistance over the years in many locations. Recently, several cultivars and advanced lines derived from the CIMMYT line, Milan, have been observed to carry a high level of resistance to blast disease throughout the endemic region. However, to date, the genetic basis of this resistance is not very clear due to extreme variation in the pathogen. Cultivars showing complete resistance against a few isolates under controlled conditions in the glasshouse, may or may not show field resistance in commercial cultivation. Due to an increase of the area under Milan based resistant wheat cultivars in Bolivia, Brazil and Paraguay, it needs to be combined with other sources of resistance urgently to prevent the selection of a virulent pathotype in the fungus. Besides genetic resistance, avoidance of early dates of seeding and chemical control can reduce the disease severity. Fungicides combining triazols with strobilurins can, under some situations, be effective in disease control at the heading stage. Even when all components of integrated disease management of wheat blast are not in place yet, it is seen as an essential strategy to reduce production losses in this region. Given the threat that the blast disease may pose to world wheat growing areas in the future, more research efforts are deemed urgent and necessary.

The Emergence of Ug99 Races of the Stem Rust Fungus is a Threat to World Wheat Production

Race Ug99 of the fungus Puccinia graminis tritici that causes stem or black rust disease on wheat was first detected in Uganda in 1998. Seven races belonging to the Ug99 lineage are now known and have spread to various wheat-growing countries in the eastern African highlands, as well as Zimbabwe, South Africa, Sudan, Yemen, and Iran. Because of the susceptibility of 90% of the wheat varieties grown worldwide, the Ug99 group of races was recognized as a major threat to wheat production and food security. Its spread, either wind-mediated or human-aided, to other countries in Africa, Asia, and beyond is evident. Screening in Kenya and Ethiopia has identified a low frequency of resistant wheat varieties and breeding materials. Identification and transfer of new sources of race-specific resistance from various wheat relatives is underway to enhance the diversity of resistance. Although new Ug99-resistant varieties that yield more than current popular varieties are being released and promoted, major efforts are required to displace current Ug99 susceptible varieties with varieties that have diverse race-specific or durable resistance and mitigate the Ug99 threat.

Crops that feed the world 6. Past successes and future challenges to the role played by maize in global food security

Wheat is fundamental to human civilization and has played an outstanding role in feeding a hungry world and improving global food security. The crop contributes about 20 % of the total dietary calories and proteins worldwide. Food demand in the developing regions is growing by 1 % annually and varies from 170 kg in Central Asia to 27 kg in East and South Africa. The developing regions (including China and Central Asia) account for roughly 53 % of the total harvested area and 50 % of the production. Unprecedented productivity growth from the Green Revolution (GR) since the 1960s dramatically transformed world wheat production, benefitting both producers and consumers through low production costs and low food prices. Modern wheat varieties were adopted more rapidly than any other technological innovation in the history of agriculture, recently reaching about 90 % of the area in developing regions. One of the key challenges today is to replace these varieties with new ones for better sustainability. While the GR “spared” essential ecosystems from conversion to agriculture, it also generated its own environmental problems. Also productivity increase is now slow or static. Achieving the productivity gains needed to ensure food security will therefore require more than a repeat performance of the GR of the past. Future demand will need to be achieved through sustainable intensification that combines better crop resistance to diseases and pests, adaptation to warmer climates, and reduced use of water, fertilizer, labor and fuel. Meeting these challenges will require concerted efforts in research and innovation to develop and deploy viable solutions. Substantive investment will be required to realize sustainable productivity growth through better technologies and policy and institutional innovations that facilitate farmer adoption and adaptation. The enduring lessons from the GR and the recent efforts for sustainable intensification of cereal systems in South Asia and other regions provide useful insights for the future.

Domestication evolution, genetics and genomics in wheat

Domestication of plants and animals is the major factor underlying human civilization and is a gigantic evolutionary experiment of adaptation and speciation, generating incipient species. Wheat is one of the most important grain crops in the world, and consists mainly of two types: the hexaploid bread wheat (Triticum aestivum) accounting for about 95% of world wheat production, and the tetraploid durum wheat (T. durum) accounting for the other 5%. In this review, we summarize and discuss research on wheat domestication, mainly focusing on recent findings in genetics and genomics studies. T. aestivum originated from a cross between domesticated emmer wheat T. dicoccum and the goat grass Aegilops tauschii, most probably in the south and west of the Caspian Sea about 9,000 years ago. Wild emmer wheat has the same genome formula as durum wheat and has contributed two genomes to bread wheat, and is central to wheat domestication. Domestication has genetically not only transformed the brittle rachis, tenacious glume and non-free threshability, but also modified yield and yield components in wheat. Wheat domestication involves a limited number of chromosome regions, or domestication syndrome factors, though many relevant quantitative trait loci have been detected. On completion of the genome sequencing of diploid wild wheat (T. urartu or Ae. tauschii), domestication syndrome factors and other relevant genes could be isolated, and effects of wheat domestication could be determined. The achievements of domestication genetics and robust research programs in Triticeae genomics are of greatly help in conservation and exploitation of wheat germplasm and genetic improvement of wheat cultivars.

The escalating threat of Rhizoctonia cerealis, the causal agent of sharp eyespot in wheat

Rhizoctonia cerealis, the causal agent of sharp eyespot on wheat, was not considered to be an important pathogen for many years. Recently, the disease has become endemic in many countries except for South America. The disease has created a new threat to world wheat production because the damage of wheat sharp eyespot has become increasingly severe. In this paper, previous studies on this pathogen, including the disease geographical distribution, pathogen identification, life cycle, symptoms, favourable environmental conditions, effects on wheat yield and control strategy, are reviewed. Such information will be helpful in management of sharp eyespot.

Sources of Resistance to Stem Rust Race Ug99 in Spring Wheat Germplasm.

Wheat stem rust (Puccinia graminis f. sp. tritici) race TTKSK (Ug99), with virulence to the majority of the world's wheat (Triticum aestivum) cultivars, has spread from Uganda throughout eastern Africa, Yemen, and Iran. The identification and spread of variants of race TTKSK with virulence to additional stem rust resistance genes has reminded breeders and pathologists of the danger of deploying major resistance genes alone. In order to protect wheat from this rapidly spreading and adapting pathogen, multiple resistance genes are needed, preferably from improved germplasm. Preliminary screening of over 700 spring wheat breeding lines and cultivars developed at least 20 years ago identified 88 accessions with field resistance to Ug99. We included these resistant accessions in the stem rust screening nursery in Njoro, Kenya for two additional seasons. The accessions were also screened with a bulk of North American isolates of P. graminis f. sp. tritici in the field in St. Paul, MN. In order to further characterize the resistance in these accessions, we obtained seedling phenotypes for 10 races of P. graminis f. sp. tritici, including two races from the race TTKSK complex. This phenotyping led to the identification of accessions with either adult-plant or all-stage resistance to race TTKSK, and often North American races of P. graminis f. sp. tritici as well. These Ug99 resistant accessions can be obtained by breeders and introgressed into current breeding germplasm.

Borlaug Global Rust Initiative provides momentum for wheat rust research

The discovery in 1999 in Uganda (Pretorius et al. 2000) of stem rust on wheat varieties with the 1BL.1RS translocation carrying the gene known as Sr31 came as re-awakening, even when it should not have been unexpected. The worldwide deployment of wheat varieties with the translocation probably had an effect of reducing inoculum, resulting in low incidence of the disease over an extended period. Stem rust resistance was only one of a number of advantageous features of the translocation. With acquisition of virulence for Sr31, race Ug99 as it became known, was subsequently found in epidemic proportions in Kenya and Ethiopia. Stem rust had not been a significant problem in Kenya for many years prior to 2000 although the region was a historic hotspot for the disease. In Ethiopia, with about 40% of the area growing durum the situation was different; stem rust continued to be a recurrent problem on durum whereas bread wheat was generally resistant. Subsequent events of rapid mutational changes in Ug99 to attack varieties with Sr24 and Sr36, and its further migration to Yemen and Iran, caused major concern and a prediction of the likelihood of further movement to the important grain production areas of the Indian subcontinent and beyond. Previously races of the stripe rust pathogen virulent for Yr9, also in the same 1BL.1RS translocation, were observed sequentially from equatorial Africa to India suggesting the entire wheat area in Asia may comprise a single epidemiologic zone (Singh et al. 2004, 2008). Preliminary laboratory and field tests with Ug99 confirmed that it not only had virulence for Sr31, but it also possessed virulence to other genes deployed in contemporary wheat varieties along with obvious fitness attributes. Most importantly it could cause disease on the widely used variety (mega-variety) Attila and sibs that were being widely grown from Kenya to India and Afghanistan under several different names. International concern regarding the threat to world wheat production caused by Ug99 led to the durable rust resistance in wheat project at Cornell University funded by the Bill and Melinda Gates Foundation and establishment of a Global Rust Initiative (later Borlaug Global Rust Initiative, BGRI). The BGRI led by Cornell University, CIMMYT, ICARDA and FAO is supported by many national governments and research centres. Clearly, stem rust is only one of the three rusts that threaten wheat, and currently there is a group of rapidly spreading races of the stripe rust pathogen that is a major threat to production at least as great as Ug99. One of the objectives of BGRI is to conduct an annual meeting. The first meeting was held at Ciudad R. A. McIntosh (&) The University of Sydney Plant Breeding Institute Cobbitty, Private Bag 4011, Narellan, NSW 2567, Australia e-mail: robert.mcintosh@sydney.edu.au

Development of Wheat Lines Having a Small Introgressed Segment Carrying Stem Rust Resistance Gene Sr22

ABSTRACTThe wheat stem rust resistance gene Sr22 confers resistance to Puccinia graminis f. sp. tritici Pers. race TTKSK (also known as Ug99) that developed in Africa and is an immediate threat to world wheat production. The resistance gene is present on a chromosomal translocation derived from Triticum boeoticum Boiss., which has a genome that is partially homologous to the A genome of T. aestivum L. Sr22 has been deployed in a limited number of cultivars due to poor agronomic performance of lines carrying the resistance gene. Linkage analysis of simple sequence repeat (SSR) markers on chromosome 7A was performed to identify loci closely linked to Sr22. The most tightly linked proximal and distal SSR marker loci were Xcfa2123 and Xwmc633, respectively. A two‐step process was then used to develop resistant lines having smaller chromosome segments derived from the diploid donor. First, individuals in which a single recombination event had occurred between wheat and the Sr22 introgression were identified in the mapping populations. In spite of reduced recombination between T. boeoticum and T. aestivum chromosomes, sufficient recombination events were found among 398 F3:4 lines derived from recombinant F2 progeny to recover multiple resistant individuals with smaller alien introgressions. Resistant lines were identified having less than 6% of the chromosome arm derived from T. boeoticum. These lines may provide a more agronomically desirable source of Sr22 that can be readily deployed in cultivars resistant to Ug99.

How predictable are prices of agricultural commodities? The possibilities and constraints of forecasting wheat prices

Wheat price forecasts are very important for traders, farmers and politicians as well. However, only quite accurate price predictions can guide these groups towards making the best decisions. Therefore the well-known wheat price projections of both the OECD and the FAPRI from 1996 on are tested for their predictive accuracy using Theil's inequality coefficient. Despite the fact that both models could not foresee the price peak which occurred in February 2008, their predictions offer more accurate values than a naive prediction of no price change. Nevertheless, precise price forecasts cannot be expected by the models of the OECD and the FAPRI since some short-run effects such as inappropriate weather are not predictable. Thus, our own econometric model is developed taking the previous price development, the stocks-to-use-ratio and the crude oil price into account. In comparison to the projections of both institutions the model, with rather simple assumptions, was able to generate forecasts more accurately. In a simulation study which takes different crude oil price levels and stochastic effects of the world wheat consumption and the average yields per hectare into account, the possible wheat price range is shown as large. Therefore, price predictions can only inform about general longrun trends.

First Report of a Puccinia graminis f. sp. tritici Race Virulent to the Sr24 and Sr31 Wheat Stem Rust Resistance Genes in South Africa.

Isolates of Puccinia graminis f. sp. tritici belonging to the Ug99 race group are virulent to a broad spectrum of resistance genes, rendering most of the world's wheat germplasm susceptible to stem rust (3). Following the initial detection of Ug99 (TTKSK, North American [NA] race notation) in Uganda, virulence to the widely used Sr31 resistance gene has been reported from Kenya, Ethiopia, Sudan, and Iran (2,3). In November 2009, a wheat genotype suspected to carry Sr31 showed a susceptible response to stem rust in a disease nursery (29°08'05.02''S, 30°38'29.18''E), inoculated with race TTKSP, near Greytown in KwaZulu-Natal, South Africa. Inoculation of urediniospores of the field collection (isolate UVPgt60) onto seedlings of line Federation4*/Kavkaz confirmed virulence for Sr31. In three independent, replicated, and comparative seedling tests, eight single-pustule isolates of UVPgt60 all typed to race PTKST following the NA race nomenclature. These isolates produced compatible infection types (ITs) (3+ to 4) on the Sr31 testers Gamtoos, Sr31/6*LMPG, Federation4*/Kavkaz, Kavkaz, and Clement, whereas isolate UVPgt59 (TTKSP) was avirulent (ITs ;1 to 1) on these genotypes. In addition to Sr31 virulence, the new race differed from TTKSP by producing a lower IT (2 to 2++) on Cns_T.mono_ deriv., the accepted entry for Sr21 in the NA differential set. The UVPgt60 isolates were clearly avirulent on Einkorn (Sr21) (IT ;1=), a response that also differed from those produced by BPGSC, TTKSF, and TTKSP (IT 2). With the exception of Sr21, UVPgt60 isolates had a virulence pattern similar to race TTKST (1), notably the virulence combination for Sr24 and Sr31. Isolate UVPgt60.6 was randomly selected for testing on additional Sr genes and South African wheat cultivars and breeding lines. Similar to the race identification experiments seedling tests were duplicated and compared with reactions produced by TTKSP and other races. Greenhouse temperatures for all seedling tests ranged between 18 and 25°C. On the basis of primary leaf responses, PTKST is avirulent (ITs 0; to 2++) for Sr13, 14, 21, 22, 25, 26, 27, 29, 32, 33, 35, 36, 37, 39, 42, 43, 44, Em, Tmp, and Satu and virulent (ITs 3 to 4) for Sr5, 6, 7b, 8a, 8b, 9a, 9b, 9d, 9e, 9g, 10, 11, 16, 17, 24, 30, 31, 34, 38, 41, and McN. From 103 South African wheat cultivars and lines tested as seedlings, 59 and 47 were susceptible (IT ≥ 3) to races PTKST and TTKSP, respectively. Simple-sequence repeat analysis (4) with selected primer pairs showed that PTKST clusters with isolates belonging to the Ug99 lineage. Subsequent to the collection made at Greytown, stem rust sampled in December 2009 from naturally infected breeders' lines at Cedara (29°32'19.59''S, 30°16'03.50''E), KwaZulu-Natal, revealed five isolates with a virulence profile similar to PTKST. On the basis of current evidence it appears that PTKST may be an introduction to South Africa rather than a single-step mutation from local stem rust races.

Potential Implications of a Special Safeguard Mechanism in the World Trade Organization: the Case of Wheat

The special safeguard mechanism both quantity and price based was key in the July 2008 failure to reach agreement in the World Trade Organization (WTO) negotiations under the doha development agenda. A stochastic simulation model of the world wheat market is used to investigate the effects of the special safeguard mechanism. As expected, the quantity-based safeguard is found to reduce imports, raise domestic prices, and boost mean domestic production in the countries that implement it. However, rather than insulating developing countries in those regions from price volatility, the quantity based safeguard increases domestic price volatility, largely by restricting imports when domestic output is low and prices are high. The quantity based safeguard shrinks average wheat imports nearly 50 percent in some regions, and global wheat trade falls by 4.7 percent. The price-based safeguard discriminates against lower price exporters and contributes to producer price instability.

Development of Supply and Demand Functions of Pakistan’s Wheat Crop

A simultaneous-equations model was used to capture the supply and demand functions for Pakistan’s wheat sector at the national level. This model reflects the fact that Pakistan’s domestic wheat supply is priceresponsive and positively affected by the use of nutrient fertilizers. While price appears to be a statistically significant factor on the supply side, it is statistically insignificant on the demand side. Population size appears to be very significant in determining wheat demand. The wheat import supply seems to be influenced by the current world wheat price, current world wheat supplies, Pakistan’s domestic consumption in previous years, and domestic supply in previous years. We recommend that policymakers allow market forces to play a role in the wheat economy in a way that protects producers from adverse market conditions. The availability of various nutrient fertilizers should be central to policies on future inputs use. Work is also needed on wheat alternatives so that the country’s dependence on wheat is eased as much as possible.

Marker-assisted wheat breeding: present status and future possibilities

Wheat production and productivity in the past witnessed a remarkable growth. However, this growth rate could not be sustained during the last decade, causing concern among world wheat community. Marker-assisted selection (MAS), which is being practiced for improvement of a variety of traits in wheat around the world, may at least partly help in providing the desired solution. Marker-trait associations are now known for a number of simple, but difficult-to-score traits, so that MAS has been found useful for improvement of several of these important economic traits. Breeding strategies including marker-assisted backcrossing, forward breeding, MAS involving doubled haploid technology and F2 enrichment have been successfully utilized for this purpose. However, for improvement of complex polygenic traits, newer technologies based on high throughput genotyping associated with new marker systems (e.g., DArT and SNP), and new selection strategies such as AB-QTL, mapping-as-you-go, marker-assisted recurrent selection and genome-wide selection will have to be tried in future. The progress made in all these aspects of marker-assisted wheat breeding, and the limitations and future prospects of this emerging technology have been reviewed in this article.

ANALISIS PROSES PERAWATAN MESIN DENGAN METODE TOTAL PRODUCTIVE MAINTENANCE DALAM KAITANNYA DENGAN TINGKAT DEFECT DAN BREAKDOWN YANG TINGGI PADA PT. FMI JAKARTA

Quality in produced product become the important factor in manufacture industry competition this time. FMI company as the biggest producer whole wheat in world always tried in order to product quality that produced may satisfied consumer desire. Problem that faced by FMI company was the high defect that exceeding standard which have determined at May-June 2009'h production. After research has doni, founded that the root caused of mctchines which doesn't work optimally. Therefore, researcher feel important discussing system of machine treatment exist in FMI company. As for method which used in this research is Stotistical Process Control (SPC) method for process quality operation, and Total Productive Maintenance (TPilrI) method for treatment machine system. By using the method, researcher will look for value of process capability (cp and cpk) by using map conduct x - R, then look for value from overall Equipment Effectiveness (oEE) in production process Mill MNO. Researcher also will lookfor potential cause that caused the height defect and breakdown in Mill MNO by Failure Mode method, Effect and Criticality Analysis (FMECA).In the end a repair suggestion will be proposed by researcher in effortto lessen level of defect may reduce breakdown time that become problem of Mill MNO. Estimate writing of this skripsi may become a positive input for continuous improvementeffort that do by PT. FMI Jakarta.Keywords : quality, defect, map conduct i- n, Ong, breakdown, FMECA, continuous improvement

Simulating the Impact of Climate Change on Rice Yield Using CERES-Rice Model

Rice (Oryza sativa L.) is the second most important food grain after wheat in World. A decline in productivity of rice in recent years has been ascribed to decrease in soil organic carbon and reserve of nutrients, non-uniform distribution of rainfall, and increase in temperature because of climate change. To assess the impact of climate change on rice yield, crop simulation model CERES-rice was calibrated and well evaluated for medium and long duration varieties through field experimental data at Kharagpur, India. Using past 27 years (1974-2000) weather data, the CERES-Rice model predicted higher yield variability of the long duration (140 days) variety 'Swarna' as compared to the medium duration (120 days) verities (IR 36 and Lalat) under rainfed condition of Kharagpur, India. However the highest mean yield was simulated for the variety Swarna. With increase in atmospheric CO2 level by 100 ppm, the grain yield of rice was increased up to 6% under optimum supply of water and nutrients. Increase in average air temperature by 20ÂoC resulted a decline in yield of both the medium duration varieties but an increase in yield of the long duration variety. The long duration variety showed better adaptability to climate change than the medium duration varieties under optimum input management condition.

“Agriculture” Is Not a Dirty Word

Agricultural science is ripe for a renaissance. For too many years, the agriculture sciences have been disparaged in the science and education communities, perhaps because agronomy, soil science, plant pathology, and animal science use a problem-solving approach rather than simply seeking knowledge. When science research funds are handed out—for example, in the federal stimulus bill—agriculture often gets left off the list. I suspect this is because policy-makers and some scientists see “agriculture” as synonymous with “agribusiness,” rather than as a purely scientific discipline, and they assume private funding will take care of agriculture-related research needs. Agricultural scientists at land-grant institutions do receive some research dollars from noncompetitive sources, but not all research is funded this way. ![Figure][1] CREDIT: DAVID HANSEN/UNIVERSITY OF MINNESOTA Adding insult to injury, the major U.S. science journals don't devote specific sections or editors to agricultural research. Some schools of agriculture have taken the word “agriculture” out of their names, presumably to attract more students in a country where only 2% of the population farms. (It hasn't worked: Enrollment in university agricultural science majors has dropped steadily nationwide since the early 1980s.) In short, agricultural science has an image problem. Our disciplines are not considered relevant and, more disturbing, we're not seen as a source of solutions to many of the world's most pressing challenges, even though many of those challenges directly relate to agricultural science. That's unfortunate, particularly in a world where people are starving or eating unsafe food, where climate change will affect every aspect of 21st-century life, and where new kinds of sustainable fuel are needed. The urgency of these global issues—all of them related to the agricultural sciences—amplifies the need for an applied-science approach. Agricultural scientists can do amazing things when they combine their expertise and have access to the resources they need. Recently, scientists at an international conference in Mexico announced that they have found a wheat variety that is resistant to Ug99—a strain of stem rust that could affect up to 90% of the world's wheat ([ 1 ][2]). Although the scientists have not completely eliminated the threat, it's clearly a breakthrough with enormous implications. Other recent signs also point to a renewed interest in and respect for agriculture. When the first lady plants a vegetable garden on the White House lawn for the first time in half a century, she's sending a strong message: Food is important. Books about eating a sustainable, healthy diet top our best-seller lists. The National Gardening Association expects a 19% jump in the number of people growing at least some of their own food this year. Clearly, a growing number of Americans are interested in where their food comes from, even on a small scale. The 2008 Farm Bill creates the National Institute for Food and Agriculture, which will be headed by a distinguished scientist directly appointed by the president. A small thing, perhaps, but it elevates agriculture to a level of prominence along the lines of health and other sciences. The farm bill also increases funding for competitive grants in both basic and applied agricultural research, which will provide opportunities for advanced study. Enrollment is up 16% since 2005 among college students in the professional associations that specialize in soil and crop sciences and agronomy, which suggests that today's students are interested in learning more about agricultural and environmental issues. Job prospects also are good; the Bureau of Labor Statistics predicts that employment for agricultural and food scientists will be at least average overall and much higher than average in some specialties. In the long run, does it really matter whether “agricultural scientists” are what we call the people who ensure a safe and plentiful food supply, clean water, and healthy soil? Maybe not, as long as this critical work is funded and accomplished. But as we move into a new era of shared accountability and responsibility, let's keep in mind that agricultural sciences affect us all, and when agricultural science is thriving, our communities likely are thriving, too. 1. [↵][3] 1. J. Vidal , “‘Stem rust’ fungus threatens global wheat harvest,” Guardian (19 March 2009); [www.guardian.co.uk/environment/2009/mar/19/rust-fungus-global-wheat-crops][4]. [1]: pending:yes [2]: #ref-1 [3]: #xref-ref-1-1 View reference 1 in text [4]: http://www.guardian.co.uk/environment/2009/mar/19/rust-fungus-global-wheat-crops