Showing 201 - 300 of 453 Results ( Previous | Next )
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Coming Up
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Available from ANR Communication Services
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About California Agriculture
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2010 Index
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The need for caregiver training is increasing as California ages
Informal and formal caregivers are underpaid and undertrained, and stress puts them at considerable risk of ill health. |
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Limited-income seniors report multiple chronic diseases in quality-of-...
In a survey and forum, elders preferred the personal approach to learning how diet and activity can improve the management of their diseases. |
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Memory, brain and aging: The good, the bad and the promising
Episodic is the only type of long-term memory that declines with age; other types improve or show no change. |
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Cognitive and motivational factors support health literacy and acqui...
There is a pressing need to understand age-related changes in the processes underlying the ability to read, understand and use health information. |
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Available from ANR Communication Services
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Effects of stress on health and aging: Two paradoxes
Older adults can learn to be more resilient to stress, which may have long-term positive effects on their aging process. |
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About California Agriculture
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Aging baby boomers to challenge Golden State
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Coming Up in California Agriculture
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Last chance to renew your California Agriculture subscription!
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Sidebar: Long-term care is an important consideration in financial pla...
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Suckow hired as Cal Ag's new art director
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Cal Ag moves to Richmond
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From our readers
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Continue receiving California Agriculture?
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Letters
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Letters
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Continue receiving California Agriculture?
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Cal Ag art director retires
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Letters: April-June 2010
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Renew online to continue receiving California Agriculture!
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Letters: January-March 2010
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2009 Index
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Sixty-three years of California Agriculture now online...
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Laue leads Cal Ag into digital future
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Cultural practices
Not available – first paragraph follows: Since the Citrus Experiment Station began in 1907, a major concern has been development of more efficient fertilizer practices. Early experiments by CES scientists, primarily in the orchards of cooperating growers, showed that on most, but no... |
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Breeding and development
Not available – first paragraph follows: When Howard B. Frost began citrus breeding at the University of California Citrus Experiment Station in 1914, knowledge of crossing relationships in the genus was limited to earlier studies in Florida by the U.S. Department of Agriculture. Fr... |
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History of the Citrus Research Center
Not available – first paragraph follows: From the start of the California citrus industry in the 1860s, the pioneer citrus growers of southern California, many of them retired business or professional men from New England or the central states, showed an eagerness to explore every i... |
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Insect pests and their control
Not available – first paragraph follows: University research on insects and mites on citrus began in southern California in 1906 with the appointment of H. J. Quayle to the U.C. Plant Disease Laboratory at Whittier. In 1916 he correctly attributed resistance of black scale and Calif... |
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Diseases and their control
Not available – first paragraph follows: Several times in the past 75 years, California's citrus industry faced catastrophic losses from fruit and tree diseases. In every case, timely research greatly reduced the damage. |
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Genetic alteration of yeast
Not available – first paragraph follows: Yeast is one of the major industrial microorganisms, used in the brewing, baking, and wine industries. Most improvements in wine making have resulted from better grape varieties (such as Ruby Cabernet developed at University of California, Da... |
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Cloning coast redwoods
Not available – first paragraph follows: In a redwood breeding program, time is a problem. Between germination (or planting) and harvest as a renewable source of wood, a redwood must survive and grow in a minimally managed environment for three to eight decades. Trees in park and am... |
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Improving woody crops
Not available – first paragraph follows: Genetic engineering and cell and tissue culture have already begun to influence the breeding and vegetative propagation of superior rootstocks and woody perennial trees for efficient forestry systems and urban plantings. In our laboratory, ha... |
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Herbicide tolerance
Not available – first paragraph follows: Isolation of mutants tolerant or resistant to herbicides may become a valuable application of cell culture techniques. Every herbicide is restricted in use by the number of crops it damages or kills. Tolerant mutants of various plant species ... |
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Enhancing nitrogen fixation
Not available – first paragraph follows: Production of ammonia from atmospheric nitrogen by the Rhizobium-legume symbiosis offers opportunities for genetic improvement of both Rhizobium bacteria and host legume. Root nodules formed by rhizobia are the organs responsibl... |
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Genetic disease resistance
Not available – first paragraph follows: The most widely used plant disease control method has been the incorporation of single, usually dominant, genes for disease resistance into cultivated plants. In some cases, disease control also has been accomplished by withdrawal from plants... |
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Developing salt tolerance
Not available – first paragraph follows: Salinity and its potential influence on plant productivity can be managed either by physically manipulating the environment in which the plant grows or by biologically manipulating the plant to reduce the harmful effects of excess salt. The c... |
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Isozymes in plant breeding
Not available – first paragraph follows: Isozymes are multiple molecular forms of an enzyme derived from a tissue of an organism. They are usually separated when an electric charge causes their migration through a gel, and they are visualized when the gel is placed in a solution of ... |
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Embryo callus hybrids
Not available – first paragraph follows: Hybridization between cultivated species and related wild species has been of great value for cultivar improvement. Genes that enhance the survival of the wild species by providing disease or insect resistance, salt tolerance, cold tolerance,... |
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Pollen selection
Not available – first paragraph follows: Conventional plant breeding has steadily improved food production efficiency, but in the process, crops have been selected for genetic uniformity and adaptation to relatively optimal environments. Environmental stresses at particularly vulner... |
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Hybridization in strawberries
Not available – first paragraph follows: Polyploidy is important in strawberries, because only in the end products found in nature (octoploids Fragaria chiloensis and F virginiana) were the necessary genes found, organized, and conserved in such a way as to make possib... |
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Induced chromosome pairing
Not available – first paragraph follows: Success in hybridizing wild with cultivated species ultimately depends on the ability of the alien chromosomes to pair and recombine with the chromosomes of the crop species at meiosis. In bread wheat, pairing and thus recombination normally ... |
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Wheat-barley hybrids
Not available – first paragraph follows: Some crop plants have simple inherited characters that would be desirable if transferred to another crop. Our current work on transfer of resistance to the barley yellow dwarf virus (BYDV) from barley to wheat is an example of a simple modifi... |
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Cell mutagens
Not available – first paragraph follows: Realizing the full potential of plant somatic cell genetic techniques will depend on development of methods for isolating a wide variety of cultured cell strains with characteristics different from those of cells in the original cultures. To ... |
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Somaclonal variation
Not available – first paragraph follows: Successful application of in vitro cell and tissue culture technology to crop improvement hinges on the ability to regenerate plants of known genetic constitution. For example, when using cell or tissue culture as a means of cloning, o... |
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Regeneration of plants
Not available – first paragraph follows: Reporting his pioneering experiments on plant cell culture to the German Academy of Science in 1902, G. Haberlandt predicted that someday “in this way one could successfully cultivate embryos from vegetative cells.” Had IAA and ki... |
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Protoplast regeneration
Not available – first paragraph follows: Plant cells without walls (protoplasts) can be isolated from leaves by a process of enzy-matically digesting away the middle lamellae between cells and the cell walls. Tremendously large numbers of protoplasts can be isolated from a single le... |
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DNA plant viruses
Not available – first paragraph follows: A remarkably simple genetic system for study of DNA multiplication and gene expression in plants is provided by DNA plant viruses. These viruses have only a half-dozen or so genes that are believed to be regulated in the same way as other pla... |
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The Ti plasmid
Not available – first paragraph follows: Crown gall, a bacterial disease of dicots and gymnosperms, is characterized by tu-morous overgrowths on infected plants. Because the disease involves gene transfer from a bacterium to a plant cell and subsequent expression of new characterist... |
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4. Gene vectors: Crossing natural barriers to genetic manipulations
The Ti plasmid/Einset; DNA plant viruses/Shepherd, Daubert, Gardner |
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Storage protein genes
Not available – first paragraph follows: Interest in the developmental and molecular biology of the proteins that accumulate as reserves in seeds has become keen in recent years. Although most plant cells contain large numbers of different proteins, each present only in small quanti... |
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Leaf protein synthesis
Not available – first paragraph follows: The most abundant proteins in the leaves of higher plants perform specialized functions in photosynthesis. Many of these proteins are located within the chloroplast. Some are encoded by the chloroplast genome, and some by the nuclear genome. ... |
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Maize anaerobic genes
Not available – first paragraph follows: A higher plant has between one and ten million genes, each of which holds information that specifies the structure of a product RNA and, often, a protein. In addition, each has nucleotide sequences involved in recognizing on-off signals. Usin... |
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‘Nif’ and ‘hup’ genes
Not available – first paragraph follows: All crops need nitrogen for growth. Nitrogen fixation—the enzymatic conversion of atmospheric nitrogen gas into a form available to the plant—is a trait that only some bacteria have evolved. |
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Letters
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A new approach to virus-free citrus trees
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Growth control of laurel fig with chlorflurenol
Where foliar sprays are impractical, the growth regulator chlorflurenol applied by trunk banding can lengthen the pruning cycle. |
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Applying parasitic nematodes to control carpenterworms in fig orchar...
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Whitefly-transmitted disease complex of the Desert Southwest
Studies so far indicate that whiteflies transmit at least three widespread diseases of desert crops. |
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A classic model of successful research
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Control of Liriomyza trifolii with biological agents and inse...
Several parasites are being evaluated for possible use in conjunction with compatible insecticides. |
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Monitoring aphid infestations on broccoli
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Cotton growth related to plant's water status
Measuring the plant's water status instead of soil moisture makes it possible to irrigate according to needs at each growth stage. |
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A simplified bioassay system: Improved detection of dicofol-resistan...
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3. Plant genes: Understanding mechanisms of gene expression
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2. Plant breeding: Successes and limitations
Not available – first paragraph follows: Since its beginning, the University of California has been actively involved, directly or indirectly, in traditional plant breeding programs, including germplasm collection and evaluation, development of genetic stocks for use in plant breed... |
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1. Genetic engineering: The new techniques and their potential
Not available – first paragraph follows: In one sense, genetic engineering of plants is really nothing new. Since the beginnings of agriculture, when crop species were first domesticated, people have modified plants to suit their needs. In saving seed from only their best plants, an... |
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The role of the university in genetic engineering
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7. Agricultural applications: Integrating conventional and molecular...
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6. Innovations in plant breeding: New concepts in whole-plant geneti...
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California agriculture and genetic engineering
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5. Somatic cell genetics: Manipulating plants through single-cell te...
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Large-scale releases of pesticide-resistant spider mite predators
Success in mass-rearing and releasing genetically improved predators in almond orchards brings full-scale implementation nearer. |
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Rice sterility varies with area and variety
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Chemical and cultural control of kikuyugrass in turf
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Eureka, a sweet potato resistant to soil rot (pox)
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Late-fall nitrogen application in vineyards is inefficient
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Update: Oat hay variety trials
The three standard and two new oat varieties tested all produced high-quality hay. Each had particular advantages. |
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The next eraan era of limits
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Donations for agricultural research July 1, 1980-June 30, 1981
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Spider mites can reduce strawberry yields
Stress caused by spider mite feeding reduced strawberry yields, especially when mites built up rapidly and early in the season. |
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Monitoring and modeling San Jose scale
Like the oriental fruit moth model, this technique for timing sprays against San Jose scale needs perfecting but is useful now. |
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Monitoring and modeling oriental fruit moth in California
Using traps to monitor OFM in orchards and a model to predict temperature- influenced development will improve timing of controls. |
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Restricting flow of almonds to export markets may raise profits
While growers may obtain short-run gains by restricting exports, these may later be offset by a loss in market share. |
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Drought takes toll on Central Coast's native oaks
A survey conducted on Central Coast rangeland revealed that 6 years of drought is one more factor contributing to the death of native oaks. |
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Controlling dodder in alfalfa hay calls for an integrated procedure
Mowing and burning become increasingly important methods of dodder control as the alfalfa season progresses. |
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When measuring soil water content, field practices affect neutron mo...
The authors have developed guidelines for improving neutron moisture meter measurements. |
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Natural enemies of Russian wheat aphid identified in California
Research revealed natural enemies of Russian wheat aphid; their impact can be augmented by imported species. |
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Agricultural, environmental issues need interdisciplinary approach
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Effectiveness of leafhopper control varies with lacewing release met...
New recommendations call for accurate monitoring of leafhopper densities and careful delivery of lacewing eggs. |
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California's apple industry gets a new fresh look
San Joaquin Valley growers are shifting to fresh market production of Granny Smith, Fuji, Gala and other new varieties. |
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With fewer acres, more mechanization: California leads Spain in almo...
Almond producers here and abroad respond to similar factors; if California prices go up, so will world production. |
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Why lacewings may fail to suppress aphids … Predators that ea...
The predatory green lacewing, Chrysoperla carnea, is often abundant in mid- and late-season cotton fields in the San Joaquin Valley. However, neither these natural populations nor insectary-reared and mass-released lace-wings appear to suppress populations of the cotton aphid. The key reas... |
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Insect pathogen “Bt” controls peach twig borer on fruits...
Results suggest growers can control peach twig borer using the insect pathogen Bt early in the season. |
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Domestic, world market growing … Grape juice concentrate emer...
Consumer preferences for fruit sweeteners over table sugar have strengthened an already growing concentrate market. |
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Shredding “mummy” walnuts is key to destroying navel ora...
Simply removing mummy nuts from trees does not destroy overwintering larvae and pupae or prevent insect emergence. |
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Berber orchardgrass tested as cover crop in commercial vineyard
Orchardgrass reduced vine growth, but did not increase vine yield; it lowered some insect and nematode populations. |
Showing 201 - 300 of 453 Results ( Previous | Next )
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