Life Sciences Commons^™

Results Of The Seventh International Winter Wheat Performance Nursery Grown In 1975, K. D. Wilhelmi, S. L. Kuhr, V. A. Johnson, P. J. Mattern, J. W. Schmidt

Historical Research Bulletins of the Nebraska Agricultural Experiment Station

This is the seventh report of results from an International Winter Wheat Performance Nursery (IWWPN) organized in 1968 by the Nebraska Agricultural Experiment Station and the Agricultural Research Service, U.S. Department of Agriculture, under a contract with the Agency for International Development, U.S. Department of State. The Nursery was designed to (1) test the adaptation of winter wheat cultivars in a range of latitudes, daylengths, fertility conditions, water management regimes, and disease complexes; (2) identify superior winter cultivars to serve as recipient genotypes for high protein and high lysine genes, and (3) test the degree of expression and stability of …

Effect Of P, K, And Lime On Growth, Composition, And P Absorption By Merion Kentucky Bluegrass, T. L. Watschke, D. V. Waddington, David J. Wehner, C. L. Forth

Office of the Dean (CAFES) Scholarship

Information is needed concerning the effects of different soil fertility levels on the activity of turfgrass roots in that part of the soil profile sampled for routine soil tests. In Pennsylvania, a sampling depth of 5 to 7.5 cm is suggested for established turf. A study was conducted on 'Merion' Kentucky bluegrass (Poa pratensis L.) to determine relationships among lime, phosphorus, and potassium applications; soil test results; foliar growth and elemental analysis; and root activity as determined by ³²P uptake from three soil depths. In the field, soil pH values were 5.8 and 7.0, P ranged from 13 …

Boron Fertilization Of Corn In Kentucky, Lloyd W. Murdock, Kenneth L. Wells, H. F. Miiller

Agronomy Notes

The need for use of boron (B) for alfalfa production has been recognized for many years in Kentucky and is presently recommended for general use as an annual topdressing on alfalfa fields. Use of B is also recommended in Kentucky for red clover fields which are to be harvested for seed. In recent years, there has been interest in use of fertilizer B for good corn production in Kentucky. Plant available B is greatly affected by soil pH and decreases with increasing soil pH. Because of this, some states recommend use of B on corn grown on soils with a …

Research For Connecticut By The Storrs Agricultural Experiment Station

Storrs Agricultural Experiment Station

No abstract provided.

Manganese Fertilization Of Soybeans, Lloyd W. Murdock, Harold F. Miller, Doyle Peaslee, Wilbur Frye

Agronomy Notes

Only a small quantity of manganese is essential for plant growth however under certain soil conditions even this is not available to the plant. Depending on severity, manganese deficiency will retard plant growth and may drastically decrease yields. A deficiency of manganese will affect the photosynthesis system of the plant. The visual symptoms of a manganese deficiency on soybeans is interveinal chlorosis of the leaves. The veins remains green until the chlorosis nears the white stage then they also lose their color.

Report On Kellogg Rural Adjustment Unit (Krau) Conference, Peter Eckersley

All other publications

The aim was for the 170 attenders to define how much productivity increases could help farmers in the main rural industries, and what size increases are likely in the foreseeable future (especially the next 5 years recommend feasible Government and industry action to stimulate increases in farm productivity.

Tb85: A New Potato Scab Problem In Maine, F. E. Manzer, G. A. Mcintyre, D. C. Merriam

Technical Bulletins

The scientific literature is filled with conflicting reports on the development of the common scab disease of potatoes and its causal organism. One unresolved question is soil reaction, once thought to be the answer in controlling this disease. Scientific studies an d practical experience over a long period had shown that acid soils having a pH of approximately 5.3 or below usually did not support common scab development, though sporadic and unexplained reports of disease occurrence in these soils were observed. In the late 1950s, however, such reports became more frequent in Maine and before the mid-1960s, losses relate d …

Alfalfa Response To Varying Rates Of Phosphorus And Potassium Fertilization On Deep, Red, Limestone - Derived Soils Of The Pennyroyal Area In Kentucky, H. C. Vaught, Kenneth L. Wells, K. L. Driskill

Agronomy Notes

The Western Pennyroyal area of Kentucky consists largely of deep, well-drained limestone-derived soils occurring on an undulating to rolling landscape. A thin loess mantle overlies the limestone residuum in many areas. Soils on these landscapes are capable of good crop production, providing the basis of the rather intensive grain-hay- tobacco-livestock farming systems common to the Pennyroyal area. Because of the well-suited physical characteristics of these soils, alfalfa is a very important hay crop to this area.

Field Tests Of Some Liming Treatments For Growing Burley Tobacco On Acid Soils, A. M. Wallace, Kenneth L. Wells, J. L. Sims, Paul Gray

Agronomy Notes

A major problem in the production of tobacco on acid soils in Kentucky is manganese toxicity, despite the fact that it can be easily prevented. Since manganese toxicity is caused by high levels of soil acidity, prevention of soil acidity by liming is the best method of control. And soil testing is the only way to determine how acid a field has become.

Growing Degree Days Predictions For Corn And Sorghum Development And Some Applications To Crop Production In Nebraska, R. E. Neild, M. W. Seeley

Historical Research Bulletins of the Nebraska Agricultural Experiment Station

The concept of growing degree days (GDD) originated with observations by Reamur (1735) that plant development is more closely related to the temperature accumulated to a given stage than with time alone. It was not until nearly 200 years later, however, that Merriam (1894), Livingston (1916) and Klages (1942) began to use temperature accumulations in plant distribution studies and in crop geography. In the early 1950's, a system involving growing degree days became widely used in the canning industry to schedule plantings and thus control time of harvest of rapidly maturing vegetables. This system provided a more precise control of …

Relationship Between Soil Ph And Yield Of Burley Tobacco, J. L. Sims, W. O. Atkinson, Kenneth L. Wells

Agronomy Notes

Historically, use of soil with a pH of 5.6 to 5.8 has been recommended for producing best quality burley tobacco. This recommendation for a relatively low pH resulted from the reported increases in the incidence of certain diseases, notably black root rot (Thielaviopsis basicola) and black shank (Phytophthora parasitica), in soils with pH greater than 5.8. Additionally, some researchers have reported undesirable chemical properties of cured leaf grown on soils that had been limed. However, workers at the Kentucky Agricultural Experiment Station generally have reported favorable effects from use of lime on both yield and quality of tobacco grown in …

Foliar Fertilization Of Soybeans, Kenneth L. Wells, Dennis B. Egli, C. E. Wyatt, John Kavanaugh

Agronomy Notes

Research reported by Iowa State University during the winter of 1975-76 suggested that a means of increasing soybean yields by use of a specific foliar fertilizer had been demonstrated (1976). Theory proposed to explain the reported responses was as follows: Up to the seed filling period in soybean growth, soybean roots and activity of nitrogen-fixing bacteria contained in root nodules are capable of supplying the necessary nutrients to meet the plants demands. However, as seed filling begins root growth stops and nodule activity declines. This results in nutrients being redistributed from leaves to seeds and a reduction in rate of …

Effect Of Lime And Source Of Nitrogen Fertilizer On Yield And Chemical Composition Of Burley Tobacco, J. L. Sims, W. O. Atkinson, Kenneth L. Wells

Agronomy Notes

Current trends in the fertilizer industry indicate a shift to greater production of ammonium forms of nitrogen fertilizer in comparison to nitrate forms. Reasons for these trends are many, but both economic and energy conservation are major factors. Generally, ammonium forms are produced with less, total energy and have higher nitrogen contents that permits lower production and transportation costs per unit of N. Agronomically, ammonium forms are less readily leached from soils, but produce acid as they are converted to nitrates by soil microorganisms. Thus, ammonium sources of nitrogen have both advantages and disadvantages as fertilizers for crops.

Soil Science Research Report - 1977

Soil Science Research Reports

Corn Experiments

Nitrogen Rates on Corn .............. Section 1

Nitrogen Rates for Corn Grain in an Eco-fallow Rotation .............. Section 2

Anhydrous Ammonia and N-Serve^R for Irrigated Corn .............. Section 3

Anhydrous Ammonia and N-Serve^R Fall Applied .............. Section 4

Evaluation of Cold-Flow™ Method of Applying Anhydrous Ammonia .............. Section 5

Influence of Nitrogen Applied at Silking with a Hi-boy on Irrigated Corn ...... Section 6

Effect of Broadcast Phosphorus, Potassium and Zinc for Irrigated Corn on Sandy Soils .............. Section 7

Lime and Boron for Corn .............. Section 8

Effect of Irrigation Well Capacity and Plant Population …

Phosphorus And Sulphur Group, J. W. Bowden, R J. Lunt, K F. Longbottom

Experimental Summaries - Plant Research

Long Term Trials Stocking and superphosphate trials - 66M30, 68BR7. Maintenance Phosphorus x Sulphur trials - 65A1, 65N5, 65C5, 69WH15, 68B1, 69AL3 and 67N05. Low Rainfall Crops and Pastures. Residual phosphorus trials - 76ES8, 75KA4, 75LG26 and 76NA5. Miscellaneous Cropping Trials. Rate of phosphorus on wheat - 77ES2, 77ME5, 77N03. N. P and seed rates on wheat - 77JE1. Row spacing, phosphorus and seed rate on wheat - 77ME6. Phosphorus on nitrogen build up - 77M033. Rate of super on old land lupins - 77A18 & 19, 77BA13 & 14, 77E20. Pasture Trials. Phosphorus and Sulphur on old land pasture …

Cultivar Evaluation In High Rainfall Areas, D J. Gillespie

Experimental Summaries - Plant Research

1. Trikkala Evaluation Trial 76MT3. A joint trial with D.A. Nicholas. The trial's aim is to compare the competitive ability under grazing of Trikkala and Yarloop clover on a waterlogged new land site. The competitive ability to be measured in the presence and absence of clover scorch. (Kabatiella caulivora). 2. Pasture deterioration. Field experiments. Three trials established in 1975 to determine whether various cultivation techniques could control root rot and. subsequent pasture deterioration have now concluded. 3. Lucerne productivity and persistence. 4. Effects of saline irrigation water on pasture production. During the 1976/77 irrigation season the effects on pasture production …

Longevity Of Doublegee Seed Under Continuous Pasture, D J. Gilbey

Experimental Summaries - Plant Research

Locality: Avondale, Wongan Hills and Chapman Research Stations. Background. Since 1974 pegged areas on the three research stations have been under continuous pasture and have been sampled annually to study the fate of the viable doublegee seed population. Each site was sprayed for doublegee control in the growing season before the first samples were taken in late summer of 73/74. The sites were again sprayed in the 1974 growing season except for Wongan Hills. The Wongan Hills site was cropped in 1976 and no further data is available. 74C7, 75WH65, 75WH66, 76AL11, 76C9, 76C6, 77C3, 77GE9, 77LC26, 77ME28, 77M028, 77N034, …

Summary Of Experimental Results Field Trials 1977 - Silverleaf Nightshade - Blackberry, P Rutherford

Experimental Summaries - Plant Research

Silverleaf Nightshade: Rates of three herbicides on Silverleaf Nightshade (Yealering) - 76Na11. Herbicide screening trial on Silverleaf Nightshade (Yealering) - 76Na12. Herbicide screening trial on Silverleaf Nightshade (Yealering) - 77Na22. Blackberry: Non-hormone herbicide screening on Blackberry (Torbay) - 77AL17. Herbicide screening on Blackberry (Kent River) - 77AL18. Non-hormone herbicide screening on Blackberry (Balingup) - 77B8. Herbicide screening on Blackberry (Balingup) - 77B9.

Investigations Of Ryegrass Toxicity, B A. Stynes

Experimental Summaries - Plant Research

Investigations of ryeqrass toxicity. Residual effect of nematicide on ryegrass toxicity a season after treatment (Katanning, Gnowangerup) - 76KA30. Survival of Anguina sp. and emergence from galls (Gnowangerup) - 76KA28. Effect of nematicides on the development of toxicity in ryegrass pasture (Gnowangerup) - 77KA22. Table 1. Effect of phenamiphos on the development of nematode and bacterial galls in ryegrass pasture. Effect of burning, cropping and cultivation on ryegrass toxicity (Gnowangerup) - 77KA21. Table 1. The effect of cropping and cultivation on the number of nematode and bacterial galls per gram of threshed ryegrass seed. Table 2. The effect of duration …

Nitrogenous Fertilisers For Cereals - Results From 1977 Trials On Wheat, Oats And Barley, M. G. Mason

Experimental Summaries - Plant Research

Rates of Nitrogen on Wheat, Oats and Barley - Soil Test. In this, the third year of this programme, 44 sites were selected and soil sampled during February - March. Thirty seven of these trials consisted of four replications on wheat only and the other seven consisted of three replications on wheat, oats and barley. All reps were soil sampled separately. In each rep. of the 37 trials, 20 samples were taken to 10 cm depth with pogo stick samplers. In the. other seven trials 50 samples per rep. were taken. In addition, from three holes at random across each …

A New Approach To Grain Insect Control, G D. Rimes, M. T. Sexton

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

Western Australian farmers now have a legal responsibility to control stored grain insects on their farms.

Ten species of insects, usually referred to collectively as 'weevils', have been 'declared' under the Agriculture and Related Resources Act.

In Western Australia, grain storage insects are not found in standing cereal crops. Thus, it should be possible to set up a clean delivery "pipeline" from the paddock to the C.B.H. bin.

Minimum Tillage For Crop Planting, Geoffrey A. Pearce

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

this article is condensed from a report of studies of minimum tillage systems and research in the United Kingdom and North america during 1976.

The author, Mr Geoff Pearce, is a Senior Research Officer in the Department of Agriculture's Weed Agronomy Section. He has been associated with reduced tillage research in Western Australia for several years and undertook the study tour to gain the benefit of intensive overseas research on the subject.

Phosphorus Fertilisers For W.A. Farming, Michael D A Bolland

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

Phosphorus is one of the major nutrients essential to plants. Eithout the use of phosphorus fertilisers, few soils in Western Australian sagricultural areas would be agriculturaly productive.

Superphosphate has been the major source of phosphorus fertiliser used in W. A..

Now there is a possibility that the alternatives to superphosphate may be cheaper

Crop Variety Recommendations For The 1978 Season, Department Of Agriculture, Western Australia

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

Recommendations on which varieties are likely to be most profitable for farmers to grow are based on yields in Department of Agriculture trials and suitability of grain, in relation to the capacity of vatious didtricts for producing different types of grain.

South West Sub.Clover Root Rot 1976 Cultivation Experiments, M J. Barbetti

Experimental Summaries - Plant Research

To investigate the effect of cultural practices upon the incidence and severity of sub-clover root rot. Localities Karridale (75BU11); Walpole (75DE12); and Narrikup (75AL36). Table 1 and table 2. Tl = Area fallow August to March; March cultivation and reseeded T2 = Spring cultivation and sown to-oats; March cultivation and reseeded. T3 = March cultivation and reseeded. T4 = Control. No treatment.

Phosphorus Sources Trials, M Da Bolland, M J. Baker

Experimental Summaries - Plant Research

HIGH RAINFALL AREAS -Sand 76BU1 - New land phosphorus sources trial (pasture) T. O'Byrne, Yalingup. 76BU4 - Old land phosphorus sources trial (pasture) T. Combe, Busselton. Gravel 76MT10 - New land phosphorus sources trial (pasture) Mt. Barker Research Station. 76MT9 - Old land phosphorus sources trial (pasture) Mt. Barker Research Station. 77MT1 - Newland particle size and method of cultivation phosphorus source trial (pasture) Mt. Barker Research Station. 77MT2 - Old land phosphorus sources cropping trial (oats every 3rd year) Mt. Barker Research Station. MEDIUM RAINFALL AREAS Sand 76ES37 - Young land phosphorus sources trial (pasture) F. Fels, Esperance. 77E1 …

1977 Summary Of Results Of Field Experiments (January 1978), D L. Chatel

Experimental Summaries - Plant Research

1. Inoculation. 1.1. High rainfall. 1.2. Low rainfall. 2. Clover Scorch. 3. Rye grass toxicity. LIST OF EXPERIMENTS 1. The responses of varieties of Trifolium yanninicum to inoculation with different strains of rhizobia - Denmark. 2. The response of T. yanninicum to inoculation over two growing seasons - Denmark. 3. The response of white and strawberry clovers to inoculation - Denmark. 4. The response of sub clover to inoculation - spaced row trial - Merredin. 5. The response of sub clover to inoculation - plot trial (Not sampled) - Merredin. 6. The response of sub clover to inoculation - spaced …

Effect Of Soil Properties On Copper Availability To Plants, R. F. Brennan

Experimental Summaries - Plant Research

Experimental glasshouse work involved examining the decrease in effectiveness of copper fertilizer in the soil through time. This seems to conflict with Mr. J.W. Gartrell's programme of field trials which have shown no evidence for any decline in the effectiveness of the original application. 1. Ammonium cxalate extractable Cu. TABLE 3 - 77GL3. The response to copper of Gamenya Wheat grown in a range of W.A. soils (Average dry weight (3 reps) - g/10 plants). 77GL4. Dongara, Gingin, Dowerin, Newdegate, S. W. Newdegate, Merredin. TABLE 4 - 77GL4. Effect of PH and incubation on the effectiveness of CuS045H20 to Gamenya. …

Septoria Diseases Of Wheat, A. G. P. Brown

Experimental Summaries - Plant Research

The Effect of Septoria nodorum on Yield of 125 Wheat Cultivars. The aim of this experiment was as described for that of 1976. There were some modifications to the treatments which were as follows: (a) Most of the cultivars were 'new' and (b) Three levels of Septoria attack were set up:- 1. Low: cover sprayed throughout the season with the fungicide Difolatan. 2. Moderate: inoculated with Septoria three times, followed at heading out by cover spraying with Difolatan. 3. Severe: inoculated four times no fungicide. The 125 entries were sown as hill plots with the three Septoria environments as main …

Clover And Medic Breeding And Selection 1977, C. M. Francis

Experimental Summaries - Plant Research

Early Maturing Low Oestrogen Crossbreds. Disease Resistant Clovers for-Higher Rainfall Regions. Waterlogging Resistant Clovers (T. yanninicum). Overseas Collections. Early Maturing Medics from Libya. Table 1. Seed Yields of Medicago Species.