Life Sciences Commons^™

Management Of Four Alfalfa Varieties To Control Damage From Potato Leafhoppers, W. R. Kehr, R. L. Ogden, J. D. Kindler

Historical Research Bulletins of the Nebraska Agricultural Experiment Station

The main purpose of this study was to obtain information on forage yield and quality of four alfalfa (Medicago sativa L.) varieties that differed in level of resistance to potato leafhopper (Empoasca fabae Harris) yellowing, when cut at three stages of growth in the second and third cuttings in field plots, with and without insecticide application. The stages of growth were bud, 1/10, and full bloom. Other purposes included study of the same varieties in field cages manually infested at 20, 40, and 60 adult leafhoppers/square yard, and in supplemental cuttings of field plots under high natural infestation …

Tobacco Farming: The Persistence Of Tradition, Eugene Umberger Jr.

Masters Theses & Specialist Projects

The culture of tobacco has been associated with the history of Kentucky almost from the beginning and remains to this day a vital force in the state’s economy. In this age of scientific and technological advances – of increasing automation – we find that in tobacco farming, hand labor still figures prominently in the production of a major staple crop. This has resulted in the retention of traditional method, technology and terminology, long since lost in the culture of other crops which lent themselves more easily to mechanization.

The study is divided into three parts. Chapter I deals briefly with …

Reevaluation Of Common Wheats From The Usda World Wheat Collection For Protein And Lysine Content, K. P. Vogel, V. A. Johnson, P. J. Mattern

Historical Research Bulletins of the Nebraska Agricultural Experiment Station

The protein and lysine content of wheat can be altered by breeding only if genetic variability exists for these traits. Lysine is a nutritionally limiting amino acid in wheat protein. Protein and lysine analyses of the common wheats of the USDA World Wheat Collection indicated that variability does exist for these traits. Some of the variability for protein and lysine among wheats of the World Collection may not be genetic in origin, because all the 12,000 wheats analyzed were not grown in the same environment. The purpose of this study was to reevaluate selected lines from the World Wheat Collection …

Pollution Of Surface Irrigation Waters By Plant Pathogenic Organisms, James R. Steadman, C. R. Maier, H. F. Schwartz, E. D. Kerr

Department of Plant Pathology: Faculty Publications

Systematic sampling of waterways and irrigation runoff from agricultural lands in the North Platte Project of Nebraska in July and August of 1972–1974 demonstrated that phytopathogenic organisms were disseminated. The organisms monitored included the bean common blight bacterium Xanthomonas phaseoli, the bean white mold fungus Whetzelinia sclerotiorum and various nematodes. Although many types of nematodes often were recovered from irrigation water, Heterodera sp. cysts which cause significant disease problems in the valley were found infrequently. Patterns of movement of the bacterial and fungal organisms were correlated with previous or current season infection of bean plants. The short-term survival of X. …

Bionomics Of Insects Associated With Corn In The Nebraska Sandhills, J. L. Wedberg, J. B. Campbell, T. J. Helms

Historical Research Bulletins of the Nebraska Agricultural Experiment Station

Investigations were conducted in the Nebraska Sandhills to determine the impact of transition from grassland to irrigated corn on selected insect species, to identify indigenous species that may be economically important to corn production, and to provide a point of reference for future development of pest management programs for irrigated corn.

Leaf Freckles And Wilt Of Corn Incited By Corynebacterium Nebraskense Schuster, Hoff, Mandel, Lazar, 1972, M. L. Schuster

Historical Research Bulletins of the Nebraska Agricultural Experiment Station

The new bacterial disease Leaf Freckles and Wilt (LFW) of corn (Zea mays L.) was first observed in 1969 on two farms in southcentral Nebraska. Since then it has spread to other areas in the state. LFW is a serious disease on farms in six Nebraska counties (Clay, Custer, Dawson, Furnas, Hall and Phelps) and has been found in isolated cases in at least 28 other counties. In 1971 LFW was found in a seedcorn field in western Iowa, in 1973 in two Kansas counties, and in 1974 in South Dakota and Colorado. Because of its explosive nature, several …

Influence Of Time Of Application Of Nitrogen Fertilizer On Corn Yields, Harold F. Miller, Kenneth Wells, Morris J. Bitzer, G. W. Thomas, R. E. Phillips

Agronomy Notes

Soil moisture conditions can have a large effect on crop responses to nitrogen fertilization. Kentucky's usual climatic pattern of periods of heavy rainfall and relatively warm temperatures during the winter and spring seasons influences expected yield responses of corn to applied nitrogen. If nitrogen fertilizer is applied in late winter or early spring, some of it may be lost before the plants have made sufficient growth to take up appreciable quantities. The amount of loss that might be expected will be influenced by the amount of rainfall, temperature, amount of organic matter and drainage of the soil.

Summary Of 1974 Dock Control Field Trials, J M. Allen

Experimental Summaries - Plant Research

Dock control - Spray graze evaluations - 73BY8, 73HA4, 73BU5, 73MA6, 73DE6 Dicamba in pastures - 73AL38, 73BU9, 73AR9

1974 Seed Yield Of Early Maturing Crossbreds Under Wheatbelt Conditions, C. M. Francis

Experimental Summaries - Plant Research

Small plot trials sited at Merredin, Bencubbin and Bungil again demonstrated the 'bred' varieties to be at least the equal of Geraldton or Northam A under wheatbelt conditions. Growing season conditions at Bencubbin were the best for pasture in recent years. Merredin and Bungil also received above average rainfall but encountered dry conditions in September. Predictably the coarse siliceous nature of the Wodgil soil at Bungil in conjunction with the dry period produced very low seed yields. Crossbred 175.1.3 the leading crossbred at Merredin in 1973, was again significantly better than Geraldton or Northam A at Merredin and Bungil (Table …

Summary Of Trial Results - 1974, N R. Mckeown

Experimental Summaries - Plant Research

Observations and measurements were made on 10 grazing trials and 11 small-plot legume species trials in 1974. Three of the grazing trials were under crop, two of them concluding low oestrogen species trials which had been grazed since 1969, and one of them, 68M023, West Moora, as an interval between pasture phases. The small-plot trials dated from 1970 or later and on most of them half of each plot could be grazed by sheep and half was protected. These trials have continued to supply useful information on the suitabiliy of cultivars to soil and climate and will be the subject …

1975 South West Sub.Clover Root Rot - 1975 Cultivation Experiments, M J. Barbetti, G C. Macnish

Experimental Summaries - Plant Research

Trials were established in 1975 in the South West of WA to investigate the effect of time of cultivation, and nitrogen application, upon the incidence and severity of both tap and lateral root rot subterranean clover. Nitrogen application had little in the way of consistent effects. Cultivation reduced the levels of both tap and lateral root rot in many instances. These effects were most obvious and consistent at about the end of May. Cultivation just prior to or just after the break of season were the best cultivation treatments. Cultivation does appear to show some promise as a means of …

1975 Field Experiments And Cereal Disease Surveys, A. G. P. Brown

Experimental Summaries - Plant Research

1. Septoria disease of wheat - 75BA17. 2. Fungicide seed dressing on lupins 3. Cereal Disease survey - Table 7 - Zone l. Beverley R.S. B3 2. Badgingarra A2 3. Chapman Bl 4. Gibson A5 5. Merredin C3 6. Mt Barker A5 7. Newdegate B4 8. Salmon Gums C5 9. Wongan Hills B2 10. Woodgenellup A5 11. Chowerup A5 12. Neradup A5 13. W. Grass Patch B5 14. E. Salmon Gums C5 15. Mellewa Cl 16. Yuna Cl 17. N. Mingenew Bl 18. Mingenew Bl 19. Gairdner River A5 20. Jerramungup B5 21. Ravensthorpe B5 22. N. Kojonup A4 23. …

1975 Part 1 - Rates And Times Of Potassium Applications On Lupins Cv Unicrop, W. J. Cox

Experimental Summaries - Plant Research

K McQueen - Eneabba - 75TS1 I. Soil analysis II. Plant counts III. Seasonal dry matter production g/20 plants IV. Grain yield kg/ha harvested November 7, 1975 V. K, Ca, Mg and N in plants (a) effect of time of sampling (b) Effect of plant part on K concentration VI. K Ca, Mg and N uptake

Effect Of Topdressing Different Forms Of Nitrogen Fertilizer On Corn, Doyle Peaslee, Morris J. Bitzer, Harold F. Miller

Agronomy Notes

Nitrate nitrogen is the dominant form of plant-available nitrogen in soils, since even ammonium nitrogen is rapidly converted to nitrate nitrogen under Kentucky field conditions. Nitrogen in the nitrate form can be lost by leaching in the drainage water and by denitrification when the soil is saturated with water for a relatively short period of time. With the increased cost and short supply of nitrogen fertilizers, it is especially important that applications be made at a time and in a way that will minimize losses.

1974 Field Experiments On Legume Seed Inoculation, D. L. Chatel

Experimental Summaries - Plant Research

The response of sweet lupins to inoculation in Western Australia Before proceeding with details of the six lupin inoculation experiments conducted in 1974 the following comments are presented as a brief summary of the work so far done on lupin inoculation. Thirty nine inoculation experiments with sweet lupins (mainly Lupinus angustifolius var. Uniwhite, Uniharvest and Unicrop have been conducted in South-Western Australia since 1970. They have been drill-sown under farmer conditions and they have been aimed at finding where it is necessary to inoculate and the best method of inoculating seed. Of the 39 trials, 36 gave better nodulation following …

Summary Of 1975 Field Experiments With Advisers: "Rape Blackleg Disease Fungicide Trials", M J. Barbetti

Experimental Summaries - Plant Research

During 1973 and 1974 a large range of fungicide spray and seed treatment schedules were tested. The 1973 results were, on the whole, not very encouraging, but the very early post-germination spray, two weeks after germination, did indicate a possible means of control. In view of the 1973 results, in the 1974 trials fungicidal sprays were applied early, and a new method of application of fungicide to the seed, known as "prilling" was used. Using fungicide seed prills and seedless fungicide prills the idea was to have the fungicide mixed with materials which dispersed upon wetting, so releasing and making …

1975 Phosphorus And Sulphur Sources Trials, M D. Bolland

Experimental Summaries - Plant Research

1. Sulphur sources trials (a) Newdegate Gypsum Trials: Yarloop - 75YA3, Bridgetown - 75BR10, Busselton - 75BU6, Alexandria Bridge - 75BU7. (b) Gyplap - FeS04 Trial: McAlinden - 75BY4. 2. Phosphorus source trials: E. Chittering - 75NO7A E. Chittering - 75NO7B

1975 Part 2 - Rate, Time And Frequency Of Nitrogen Application On Kikuyu, W. J. Cox

Experimental Summaries - Plant Research

J. Burton,, Hazelvale 74DE7. I. Dry Matter Production kg/ha/day tables - (No Spring '74 N) (Spring N 1974) Soil Properties March 10, 1975. Total N concentration % - Tables

1975 Field Experiments On Legume Seed Inoculation, D. L. Chatel

Experimental Summaries - Plant Research

(January 1976) LIST OF EXPERIMENTS 1. The effect of cobalt and seed inoculation on Unicrop lupins. GREEN RANGE 2. The effect of cobalt and seed inoculation on Unicrop lupins. BRAMLEY RESEARCH STATION 3. The effect of cobalt and seed inoculation on Unicrop lupins. McALINDEN 4. The effect; of cobalt and seed inoculation on Unicrop lupins. CHOWERUP 5. The effect of cobalt and seed inoculation on Unicrop lupins. ALANO OKA 6. The effect of cobalt and seed inoculation on Unicrop lupins. LANCELIN 7. The effect of inoculation on Uni crop lupins. KATANNING 8. The effect of inoculation on Uni crop lupins. …

1975 Phosphorus And Sulphur Group Results, J. W. Bowden, B. Scurr, R Lunt, M Baker

Experimental Summaries - Plant Research

Stocking X Super Rate - 66M30, 68BR7. Residual Value of Superphosphate - 66 & 68LG1, 66ME3, 66NO7, 67NO11, 67NO5, 74GE2, 74MO7, 74MO8. Maintainance P X S Trials - 65A1, 65C5, 65N5, 67NO11, 68AL3, 68B1, 69AL2, 69AL3, 69E6, 69WH15. Miscellaneous trials - Rates and Methods of Super on Wheat Lupins and Clover 74LG5, 75A20 and 21; 75ES5, 6, and 7; 75GE6 and 7; 75JE7, 75JE5, 75KA3 and 4; 75LG4 and 7; 75LG26; 75MO9, 75MO28, 75NA4, 75NO5 and 6. High Rainfall Pasture Trials - 75AL4 and 5; 75AR3 and 4; 75BR11, 12, and 13; 75BY5, 6, and 8; 75BU8 and 10; 75DE2, …

1975 Trials On Doublegee, D J. Gilbey

Experimental Summaries - Plant Research

75A16, 75A17, 75C13, 75MO36, 75MO37, 75WH21, 75WH22. Biological control of doublegee.

1975 Mn Drilled And Sprayed On Unicrop, J. W. Gartrell

Experimental Summaries - Plant Research

75AL25 (with Trevenen) Mn Drilled and Sprayed on Unicrop, 75AL26, 75ES28, 785ES29, 75GE32, 75MO31, 75MO33, 75TS24, 75TS25.

1975 Evaluation Of New Subterranean Clover Cultivars, C. M. Francis

Experimental Summaries - Plant Research

This year's trials have added little to the data already accumulated on the corssbreds 175,1 and 239.2 (Table 1). Higher seed yields at Merredin would have included some hard seed from the previous year. The lack of reliable data from the May sowings due to poor viability of some seed lines (including 175 and 239) grown at Medina was unfortunate. Data from Lake King is not yet available. Geraldton performed surprisingly well in the late sowings despite overall low seed yields. With late sowing its flowering date was within a few days of the crossbreds so that late sowing appears …

Summary Of Trial Results - 1975, N. R. Mckeown

Experimental Summaries - Plant Research

1. From September 1971 to late August 1974 there was a mean reduction of legume content in the medic pastures from 40 per cent to 22.0 per cent but the reduction at 7.4 sh/ha was to 31 per cent. The drop in woolly clover content on the volunteer pastures was closely similar. 2. In 1972, at 7.4 sheep/ha a difference in body weight of 7-9 kg rapidly developed in favour of sheep grazing barrel medic compared with sheep on volunteer pasture. This difference was maintained consistently throughout the trial. At lower stocking rates the differences were smaller and less consistent. …

1975 Nitrogenous Fertilisers For Cereals - Trials With Wheat, Oats And Barley, M. G. Mason

Experimental Summaries - Plant Research

Rates of nitrogen on wheat - soil test - Fifty-one sites were selected and soil sampled during February- March. All these proposed trials consisted of four replications and these reps were soil sampled separately. In each rep. 20 samples were taken to 10cm depth with pogo stick samplers. In addition, from three holes at random across each trial bulk samples were obtained from the 0-15, 15-30 and 30-45 cm soil intervals These soil samples were air dried (if not already dry) and sieved to remove > 2 mm fraction (gravel). Portions of these < 2mm fractions from the 0-10cm samples were sent to the Government Chemical Laboratories and to C.S.B.P. & Farmers Ltd. At C.S.B.P. analyses were carried out to determine P and K content and the C.S.B.P. soil nitrogen test was also carried out on them. This measures nitrate content before and after incubation with moist soil at 32c for seven days. A measurement was also made after 14 days. At Government Chemical Laboratories analyses were to be carried for Organic carbon and for a number of nitrogen fractions, including Total Nitrogen, MH4 + NO3 Nitrogen and several incubation techniques. These were also to be determined on the profile samples, which were also to be subject to the following analyses: a) Mechanical Analysis b) pH (in water) c) Cation Exchange Capacity d) Moisture Holding Capacity All of these trials were planted except for one at Jerramungup, where the marker pegs were ploughed out by the farmer. Vegetative cuts were then taken during the August - September period on 46 of the remaining 50 sites. Three of the other four sites were abandoned because of severe waterlogging (Neridup), extreme weediness (Nugadong) or due to poor plant survival (possibly due to webworm) combined with weeds (Mallalying). The trial at Wannamal was sown to oats, by the farmer. The nitrogen treatments were still applied and the trial was retained but not sampled for dry matter production. These samples were to be analysed for nitrogen content. Dry matter production and grain yields are set out in the following tables. 61M11, 75A1. 75A2, 75A3, 75AL1, 75AL2, 75BA2, 75BA3, 75BR1, 75BR2, 75C1, 75C2, 75C3, 75E2, 75E3, 75ES1, 75ES2, 75ES4, 75GE1, 75GE2, 75GE3, 75JE1, 5JE2, 75KA1, 75KA2, 75LG1, 75LG2, 75LG3, 75M2, 75M3,75M4, 75ME1, 75ME2, 75ME3, 75MO1, 75MO2, 75MO4, 75MT2, 75MT3, 75N1, 75N2, 75N3, 75NA1, 75NA3. 75NA4, 75NO2, 75NO3, 75SG1, 75SG2, 75TS2, 75TS3, 75TS4, 75WH4, 75WH5, 75WH6, 75WH7.

1975 Wild Oat Genotype X Environment Interaction, J Patterson

Experimental Summaries - Plant Research

To investigate the interrelationships between wild oat (Avena sativa; fatua form) genotypes, herbicide treatment and time of application. Method: Split plot glasshouse (Forrestfield) experiment Reps (3) - plus three internal reps. Genotypes (5) - selected from north to south of southwest Western Australia Herbicides (4) - Avenge, S29761, Neoban, Water (Control) Times (6) - Average of 1 to 6 leaf stage Main plots were times and herbicides. Results: The following parameters were measured. .Growth stage at each time of application (number of leaves) .Height at each time of application .Date of full head emergence .Dry weight at full head emergence …

1975 Weed Trials - Annual Ryegrass, Spray Top, Broadleaved Weeds In Cereals, Wild Oats, G. A. Pearce

Experimental Summaries - Plant Research

Ryegrass in cereals - 75A24, 75E16, 75G16, 75LG5, 75N19, 75NO32. Spray top annual ryegrass trial - Locality - Wongan Hills, Merredin Research Station Avondale Research Station, Newdegate Research Station. Background - Killing of immature seed by killing seedhead with paraquat is a method of reducing seed production in annual ryegrass. Method Various rates of 'Spray top' were applied to an even stand of ryegrass. Seed counts were made in December 1975 and will be made in March 1976. Plant counts after emergence will be made as well. Counts were partitioned into seed in head and seed shed. Herbicide control of …

Evaluation Of The Systemic Nematicide Phenamiphos To Control The Nematode Anguina Sp In Toxic Ryegrass Pasture, B A. Stynes

Experimental Summaries - Plant Research

Field trials done in 1974 showed that phenamiphos could be used to control Anguina sp. and suggested that low rates may be effective with critical timing of applications. These possibilities were investigated in 1975. Locality - Katanning - F. Quartermaine and c. Butterworth. Gnowangerup - J. Griffith. Tables 1 and 2 show the absolute levels of nematodes in ryegrass seed and the density of nematodes per unit area of pasture after treatment with phenamiphos. All rates of nematicide reduced the level and density of nematodes; the highest rate being slightly more effective. The spray schedule including sprays in July and …

Spring 1975 Conference Issue, Steve Cadenelli, Joseph Troll, R. N. Carrow, Robert B. Harris, John L. Strauss, Gerald G. Williams

Turf Bulletin

1. Professionalism (page 3)
2. Back and Beyond (4)
3. Kentucky Bluegrass Variety Trial (5)
4. Perennial Ryegrass Variety Trial (7)
5. Tall and Hard Fescue Variety Trial (9)
6. Red Fescue Variety Trial (9)
7. Turf Conference Program (10)
8. Turf News (14)
9. You Can Make It Easier to Collect Soil Samples (15)

Fall 1975, Kieth Mccaffery, Fred Johnson, Randolph W. Smith, David E. Hill, Charles R. Frink

Turf Bulletin

1. Maintaining Wildlife Openings with Pellets Containing Pictoram (page 3)
2. OSHA and How it Affects the Turf Industry (10)
3. Farmers at Bunker Hill (13)
4. Septic Systems--How Long do They Last? (16)
5. Domesticating Wildflowers for the Home Garden (18)