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Documentation Of Whole-Farm Model For The Eastern Wheatbelt Of Western Australia, Ross S. Kingwell, David J. Pannell, David. A. Morrison

Grain and other field crops published reports

The Eastern Wheatbelt Model (EwM) is a hypothetical farm model, intended to be representative of farms in the eastern wheatbelt region. It is a model of an 'average' farm in an 'average' season. Nevertheless it is possible to substitute the resource mix of a 'real' farm for the •average' and to substitute various types of season for the 'average'.

Assumptions of 'average' farm resources and •average' season are based on opinions by WADA researchers and advisers. For the EWM, researchers and advisers at Merredin prescribed average resources for an eastern wheatbelt farm receiving a 300 mm average rainfall including 210 …

Marketing Programs And Strategies, J. Kenneth Evans

Kentucky Alfalfa and Stored Forage Conference

Hay has never been widely perceived as a cash crop, therefore, it has historically accounted for a very small part of the total cash sales by farmers. It has been estimated that more than 90% of all hay baled in the state is retained on the producing farms. Most of that which is sold is transported very short distances and of course if one farmer in a community has a good hay year, all do. Organized marketing efforts have been minimal in both scope and successes. In 1978, efforts were initiated toward a more organized system of marketing Kentucky hay. …

Alfalfa In Livestock Feeding Programs, Gary T. Lane

Kentucky Alfalfa and Stored Forage Conference

A magazine article entitled "Bidders Paid More For Quality at Wisconsin Hay Auction" caught my attention. Did they really pay more money for higher quality. I could not help but think of some hay sales which I have witnessed. One dollar per bale, large bales, small round bales, sixty dollars per ton, and $275 per ton are all some quotes I have heard recently in connection with hay purchases. Not much is said about quality. We may hear relative terms such as good, not much grass, cut early, not rained on or others but not much about nutrient content or …

Grazing Alfalfa, Charles T. Dougherty

Kentucky Alfalfa and Stored Forage Conference

Alfalfa (Medicaao sativa) is a native of an area south of the Black and Caspian seas and it still grows wild in Iran and eastern Anatolia. Alfalfa was the chosen forage for the fighting horses of ancient armies as long ago as 1800 B.C. when the Kassites conquered Babylon. The spread of alfalfa followed the pathway of armies through the Mediterranean, Europe, and the New World. For ages before man used alfalfa to fuel his fighting animals natural selection processes worked on the evolution of alfalfa and its predecessors. A scenario which would account for the morphology and …

The Growth Of Fetal Human Sensory Ganglion Neurons In Culture: A Scanning Electron Microscopic Study, Seung U. Kim, Kookmin M. Kim, Giuseppe Moretto, James H. Kim

Scanning Electron Microscopy

Sensory neurons of 8-week human fetal dorsal root ganglia were dissociated into single cells by trypsinization and cultured on coverslips for 4 months, in either serum-containing or serum-free chemically defined media. At different times the cultures were fixed and prepared for scanning electron microscopy. Fetal sensory neurons in culture regenerated axons within 24 hours which were characterized by axonal growth cones at their tips and the neuronal perikarya assumed spherical or a bonnet-like morphology.

Spatial Patterns Of Plant Communities And Differential Weathering In Navajo National Monument, Arizona, Jack D. Brotherson, William E. Evenson, Samuel R. Rushforth, John Fairchild, Jeffrey R. Johansen

Great Basin Naturalist

Vegetation patterns in Navajo National Monument, Arizona, were studied over a five-year period from 1977 to 1981. Twelve distinct plant community types occur within the boundaries of the park. These communities are characterized and the dominant plant species of each are recorded. The relationships of parent material, soils, and moisture to plant communities are also discussed. It appears that discrete communities occupy soils of different characteristics, particularly with respect to amount of weathering of parent material.

Estimates Of Soil Solution Ionic Strength And The Determination Of Ph In West Australian Soils, P. J. Dolling, G. S.P. Ritchie

Food Science and Nutrition

The average ionic strength of 20 West Australian soils was found to be 0.0048. The effects of three electrolytes (deionized water, CaCl₂ and KNO₃), three ionic strengths (0.03, 0.005 and soil ionic strength at field capacity, I_s) and two soil liquid ratios (1:5 and 1:10) on the pH of 15 soils were investigated. pH measurements in solutions of ionic strength 0.005 differed the least from measurements made at I_s. The differences that occurred in comparisons with distilled water or CaCl₂ of ionic strength 0.03 (0.01 M) were much greater (≥0.4 pH …

The Role Of Organic Matter In Soil Acidification, G. S.P. Ritchie, P. J. Dolling

Food Science and Nutrition

The pH and buffer capacity of two soils increased or remained constant after incubation with different amounts of plant material (lucerne cham at field capacity and when air dry. For both soils, the pH changes were greater at field capacity, whereas the buffer capacities were independent of the water treatments. The pH changes observed could be explained in terms of the organic anion concentration of the plant material. The results indicate that the initial soil pH and the anion concentration (i.e. the per cent dissociation of soluble organic acids when released into the soil) determine the acidifying effect of organic …

Ultrastructural Studies On The Cultivation Processes And Growth And Development Of The Cultivated Mushroom Agaricus Bisporus, D. A. Wood, G. D. Craig, P. T. Atkey, R. J. Newsam, K. Gull

Food Structure

Scanning electron microscopy (SEM) , transmission electron microscopy and light microscopy have been used to study various processes in the cultivation of the edible mushroom Agaricus bisporus . Mushrooms are cultured on composted wheat straw. The microbial degradation processes during composting have been visualised by TEM and SEM and correlated with microbiological studies . Various modes of attack by the microorganisms on the plant cell walls can be seen. Most rapid degradation occurred on the cuticle and phloem and spread to other cell types. Microbial attack was found to be nonuniform between tissue types and individual cells. The mycelium of …

Studies On The Effects Of Nutrition And Tillage Systems On Cereal Root Diseases., R. F. Brennan

Experimental Summaries - Plant Research

Micronutrients (Cu, Zn) and take-all, 83ES39, 83ES40. Nitrogen and Phosphorus rates and take-all, 83ES41, 83ES42, 83ES43. Split applications of Nitrogen and take-all, 84N1. Take-all and Manganese/Ammonium interaction, 84E1. Split applications of Nitrogen and take-all, 84E2. Cu residual on wheat and take-all, 67E9, 67E8. Take-all and Manganese/Ammonium interaction, 84LG2. Cultivation depths and timing effects on Rhizoctonia, 84E24. Chemical fallow and cultivation effects on Rhizoctonia, 85E33. Effects of cultivation depths and machines on Rhizoctonia and yield, 85E29.

Residual Values Of Australian Rock Phosphates, Michael D A Bolland

Journal of the Department of Agriculture, Western Australia, Series 4

For years superphosphate has been the cheapest, convenient and most effective way of supplying phosphorus to newly cleared soils in Western Australia's South-West that are acutely deficient in phosphorus. However its effectiveness as a phosphorus source falls markedly after application. Regular applications are needed to maintaine profitable pastures and crops on these soils.

After a big jump in supperphosphate prices in the mid 970s, researchers tested the use of Australian rock phosphates as potentially cheaper alternative phosphorus fertilisers to superphosphate. On the none-leaching sands, as this article shows, none of the rock phosphates was as effective for plant growth as …

Fruit Canning Methods, Georgia C. Lauritzen

Archived Food and Health Publications

Publication gives instructions for canning various different types of fruit.

Ultrastructural Ultilization Of Plants By Herbivores, L. H. Harbers

Food Structure

Study of the patterns of ruminal digestion of forages enhances the nutritional knowledge of how specific plant tissues are digested and adds its own dimension by characterizing the specific cells and the complex interactions of ruminal microflora with those tissues. A common pattern of digestibility exists for mono- and dicotyledon leaves: mesophyll and phloem are degraded readily, and sclerenchyma slowly, whereas cuticle and the remaining vascular tissues are rarely utilized . Digestion of stems is limited to parenchymal tissues in monocotyledons and to cortex and parenchyma in dicotyledons. Epidermal silica and cuticle are undigestible and restrict microbial entrance. Calcium oxalate …

Biology Of The Antarctic Krill (Euphausia Superba) And Fisheries Management Under The Convention On The Conservation Of Antarctic Marine Living Resources, Randa Ali Mansour

Marine Affairs Theses and Major Papers

Interest in the development of a commercial fishery for Antarctic krill, the lack of a legal regime to govern and promote rational exploitation of Antarctic living resources, and a desire to avoid future conflicts between claimants and non-claimants regarding the control of an Antarctic marine fishery, as well as the desire to set a precedent for management and exploitation of non-living resources were incentives for the negotiation of the Convention on the Conservation of Antarctic marine Living Resources (CCAMLR). Furthermore, the Antarctic Treaty Consultative parties wished to maintain and solidify their control and enhance their collective legitimacy in the Antarctic …

Effects Of Chronic Environmental Heat Stress On Blood Flow And Nutrient Uptake By The Uterus And Fetus Of The Pregnant Cow, Lawrence P. Reynolds, Calvin L. Ferrell, John A. Nienaber, Stephen P. Ford

Roman L. Hruska U.S. Meat Animal Research Center: Reports

Chronic exposure of pregnant cows to elevated environmental temperatures results in decreased birth weights of calves. This phenomenon is economically important since reduced birth weights are associated with decreased calf survival and growth. The adverse effects of environmental heat stress on fetal development have been greater than can be explained by a reduction in maternal feed intake or length of gestation.

The rate of uterine blood flow seems to be a primary determinant of nutrient uptake by the gravid (pregnant) uterus, and acute heat stress on days 120 to 130 of gestation has been shown to decrease uterine blood flow …

Heterosis Retention In Advanced Generation Angus-Hereford Crosses, Robert M. Koch, Gordon E. Dickerson, Larry V. Cundiff, Keith E. Gregory

Roman L. Hruska U.S. Meat Animal Research Center: Reports

Crossbreeding in beef cattle is a widely accepted production practice that influences about 70 percent of the cattle marketed in the United States. Systematic crossbreeding provides for use of heterosis and of differences among breeds to optimize average genetic merit of performance traits for adaptability to the various climatic and nutritive environments encountered in beef production. Because low reproduction rate restricts the use of specialized crossbreeding systems, it is generally assumed that rotational crossbreeding is an efficient method of using heterosis in beef cattle. In rotational crossbreeding, purebred populations are required only to produce replacement sires; whereas, mating of a …

Methane From Beef Cattle Manure And Straw Mixtures, Andrew G. Hashimoto, Steven A. Robinson

Roman L. Hruska U.S. Meat Animal Research Center: Reports

The major barrier to wide application of anaerobic fermentation technology in the agricultural sector is economics. Research and development efforts in anaerobic fermentation technology have shown that methane can be produced from livestock manures but that economies-of-scale have a significant impact on the economic feasibility.

Farmer-constructed and -operated systems were estimated to be economically feasible for beef feedlots between 1,000 to 2,000 head, and commercial "turn-key" systems were feasible for feedlots larger than 8,000 head. However, since the average U.S. beef feedlot capacity is about 150 head, and less than three percent have capacities greater than 1,000 head, this means …

Beef Research Program Progress Report No. 2 (1985): Table Of Contents

Roman L. Hruska U.S. Meat Animal Research Center: Reports

ROMAN L. HRUSKA U.S. MEAT ANIMAL RESEARCH CENTER, Robert R. Oltjen ... iv

General Interest

Cattle Management at U.S. Meat Animal Research Center: Margaret S. McAlhany, W. Gordon Hays, and William G. Kvasnicka ... 1

Genetics and Breeding

Genetic Relationships Among Carcass Traits and Their Implications in Selection Programs: Robert M. Koch, Keith E. Gregory, and Larry V. Cundiff ... 3

Length of Feeding Interval Influences Accuracy of Selection for Growth: Robert M. Koch, Larry V. Cundiff, and Keith E. Gregory ... 5

Characterization of Breeds Representing Diverse Biological Types: Reproduction and Maternal Performance of F₁ Cows: Larry V. …

Changes In The Growth And Food Utilization Of The Cabbage Looper Trichoplusia Ni (Lepidoptera: Noctuidae) After Consumption Of An Artificial Diet Incorporating The Non-Protein Amino Acid L-Canavanine, Bradley F. Binder

Theses Digitization Project

No abstract provided.

The Light Microscopy Of Triglyceride Digestion, John S. Patton, Russel D. Vetter, Margit Hamosh, Bengt Borgstrom, Mats Lindstrom, Martin C. Carey

Food Structure

During fat digestion (lipolysis) a number of physiochemical events can be seen directly by light microscopy. Hydrolysis of emulsified fat droplets bylipases at pHs above about 6.5 proceeds with the formation of visible product phases that may include both crystalline as well as liquid crystalline phases. The crystalline phase is primarily calcium-fatty acid soap and its formation is favored by high calcium concentrations, alkaline pHs, and inhibited by low pH and monoglycerides. The formation of liquid crystalline product phases are favored by low calcium-concentrations. monoglycerides and lipid saturated bile salt solutions. Both phases are solubilized by bile salts but the …

Seed Microstructure: Review Of Water Imbibition In Legumes, Barry G. Swanson, Joe S. Hughes, H. Paul Rasmussen

Food Structure

Scanning electron microscopy (SEM) is an invaluable tool for studying foods and food products. SEM has been particularly va luable in the study of seed microstructure and the ro le of microstructure in water imbibition by legumes. Controversy continues to surround the causes of hard ness in legumes as addi tional research revea ls differences between legumes that imbibe water and legumes that fail to imbibe water. SEM observation of the microstructural changes occurring in legumes during water imbibition ofkrs a better undcrstandi ng of d i ffc rcnces that ex ist betwee n hard and normal beans. Structural changes …

Proceedings From The 22nd Annual Marschall Invitational, Various Authors

Cheese Industry Conference

No abstract provided.

Effects Of Temperature And Crowding On The Pathogenicity Of Edwardsiella Ictaluri In Channel Catfish (Ictalurus Punctatus), Sharon L. Johnson, Lawrence W. Hinck

Journal of the Arkansas Academy of Science

Channel catfish were injected with Edwardsiella ictaluri and stocked at increasing temperatures and densities. Bacteriological examination of kidney, liver and spleen revealed the greatest numbers of organisms in fish from the highest temperature and stocking density tested. Survival time was the shortest for fish held at the highest temperature and stocking density. Increased temperature and crowding were directly proportional to the number of organisms recovered from the organs and inversely proportional to fish survival time.

Intsormil 1985 Annual Report: Fighting Hunger With Research, John M. Yohe

INTSORMIL Impacts and Bulletins

This annual report covers the activities for program Year 6, the final year of operation under the initial grant document.

The CRSP's present a unique model for conducting agricultural research in collaboration with developing country agricultural research programs.

The INTSORMIL program also demonstrates these characteristics:

-- INTSORMIL has the dual goal of improving agriculture in the developing countries and in the United States.

- The seven participating U.S. institutions agree to contribute at least 25% of the cost of the CRSP from non-federal resources (in money or in kind), justified on the basis of benefits that can accrue to their …

The Green Movement: Implications For Animals, Ronnie Z. Hawkins

Environment Collection

The Green movement, a newly emerging political movement that is both global in scope and firmly anchored to each local region at the grassroots level, is destined to be of great import to those concerned with the status of nonhuman animals in our society. Closely allied with deep ecology and bioregionalism, Green thinking embodies an alteration in our perception of the human organism: no longer seen as separate from and superior to all the other components of the ecosystem, our species is placed in context as one among many interdependent forms of life, with the attainment of a sustainable balance …

Holiday Bread 'Round The World, Flora Bardwell

Archived Food and Health Publications

Booklet gives a variety of recipes for Holiday Breads from different countries and cultures.

Trends In Pollination Biology, Herbert G. Baker

Aliso: A Journal of Systematic and Floristic Botany

An effusion of books and articles on pollination biology has appeared recently, showing a renewed interest in this area of reproductive biology that has strong significance for the continuous evolution of seed plants. Consequently, a comprehensive review is not possible in this paper; topics have been selected and a restricted number of examples given. New findings in "classical" pollination scenarios are reported, while newer topics include the chemistry of nectar in relation to phylogeny and pollinator types. The formation of "pollination ecotypes" within species is considered but the obstructive influence of "phylogenetic constraint" on close adaptation between flower and pollinator …

Concanavalin A-Binding Enzymes Of Crotalus Scutulatus Scutulatus Venom, Michael W. Hinson, C. K. Childs, Bob D. Johnson, Dewey H. Sifford

Journal of the Arkansas Academy of Science

Crotalus scutulatus scutulatus crude venom was separated into two fractions by Concanavalin A Sepharose 4B affinity chromatography. The proteins binding to Con A exhibited phosphomonoesterase (orthophosphoric monoester phosphohydrolase EC 3.1.3.2), phosphodiesterase, 5'-nucleotidase (5'-ribonucleotide phosphohydrolase EC 3.1.3.5), phospholipase A(phosphatidate 2-acylhydrolase EC 3.1.1 .4), hyaluronidase (hyaluronate glycanohydrolase EC 3.2.1 d), N-benzoyl-L-arginine ethyl esterase, p-toluenesulfonyl-L-arginine methyl esterase, L-amino acid oxidase (L-amino acid: 02 oxidoreductase [deaminating] EC 1.4.3.2), and caseinolytic activities. Thrombin-like and NAD nucleosidase (5'-ribonucleotide phosphohydrolase EC 3.1.3.5) activities were not observed. The crude venom and the fraction containing the glycoproteins which bound to Con A were fractionated by DEAE Sephadex A-50 ion …

G85-742 Dollar Spot Disease Of Turfgrass, John E. Watkins, Terrance P. Riordan

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide describes the symptoms and disease cycle of dollar spot, and provides recommendations for controlling this turfgrass disease.

Dollar spot of turfgrass is one of the most persistent diseases on golf courses in North America. All commonly grown turfgrasses in Nebraska may be attacked, but differences in susceptibility exist within cultivars of the various turf species. Presence of dollar spot in a well-managed lawn affects its aesthetic appearance and value, but usually does not threaten its survival. Lawns recover from dollar spot injury when conditions are favorable for vigorous, healthy growth.

G85-741 Estrous Synchronization For Beef Cattle, Gene H. Deutscher

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide discusses the potential benefits of estrous synchronization, how the products and programs work, and the results and costs involved. Estrous (heat) synchronization can help beef producers improve production efficiency and economic returns. Controlling estrus and ovulation in cycling females means breeding is completed in a short period of time. Instead of females being bred over a 21-day period, synchronization can shorten the breeding period to less than 5 days, depending on the program selected. The use of synchronization has great potential for improving beef production, but it requires good management for success. Producers should understand the advantages, as …