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Showing 1 to 20 of 32 for “"Poa pratensis L."”.
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Etiology of Stripe Smut, Ustilago Striiformis (West) Niessl, on Merion Bluegrass, Poa Pratensis L
Made available in DSpace on 2014-12-09T18:06:28Z (GMT). No. of bitstreams: 1 6808113.pdf: 2730530 bytes, checksum: 563104552f0f7f567b6b77d464e198e5 (MD5) Previous issue date: 1967
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PCR-based cloning, characterization, and stress-induced expression of chitinase genes in Kentucky bluegrass (Poa pratensis L.)
… of chitinase genes in Kentucky bluegrass (Poa pratensis L.) were studied. With primers designed from conserved regions of chitinase genes from other plant species, a 710 bp fragment (CH710) containing a partial chitinase gene sequence was amplified from Kentucky bluegrass by PCR. Using …
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The effects of rapid establishment and subsequent turf quality of agressive grasses seeded with Poa pratensis L
… with a constant rate of Kentucky bluegrass (Poa pratensis L.). Mixtures were irrigated and clipped to 1- and 2-in. sod residues. Objectives were to determine which mixture or mixtures could provide rapid initial establishment. with subsequent high quality, permanent turf. The improved …
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Development, selection and characterization of summer patch (Magnaporthe poae Landschoot and Jackson) resistant somaclones of Kentucky bluegrass (Poa pratensis L.) genotypes
… graminis), and summer patch (Magnaporthe poae). Variants highly resistant to powdery mildew and summer patch were selected, and the resistance was expressed through several cycles of vegetative propagation. There was no relationship between resistance to summer patch and that of powdery …
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Growth of roots, rhizomes, and tillers of Kentucky bluegrass (Poa pratensis L.) cultivars and genotypes as affected by fertility level, cutting height, and season
… cultivars and genotypes of Kentucky bluegrass (Poa pratensis L.). Objectives were to study effects of fertility level and cutting height on underground growth of various Kentucky bluegrasses during various seasons and develop a technique for measuring underground growth without disturbing the …
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Effects of nitrogen and cutting management on root growth and productivity of a Kentucky bluegrass (Poa pratensis L.) and white clover (Trifolium repens L.) pasture
Nitrogen (N) and defoliation effects on productivity, root growth and soil nitrate (NO3-) in a Kentucky bluegrass and white clover pasture were examined. Nitrogen was applied annually in two equally split applications at rates of 0, 80 or 160 kg N ha -1. After reaching 12.7 cm, plants were cut to …
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Controlled-Release Preemergence Herbicide Formulations for Annual Grass Control in Kentucky Bluegrass Turf
… sanguinalis (L.) Scop. in Kentucky bluegrass (Poa pratensis (L.)) turf.
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Crop-water stress index models for cool season turfgrasses
… is appropriate across both Kentucky bluegrass (Poa pratensis L.) (KB) and creeping bentgrass (Agrostis palustris Huds.) (CB), and (iii) to evaluate the performance of CB when managed under different CWSI models.
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Soil and plant factors associated with iron chlorosis of Kentucky bluegrass
… 25 varieties and 5 blends of Kentucky bluegrass (Poa pratensis L.) were utilized. Maintenance practices for all varieties were the same, and at the time of sampling the grasses were three years old, were well established, and had not been treated with iron containing materials. Soil pH, soil …
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Influence of seed and foliar applications of growth regulators on turfgrasses
… on the germination of Kentucky bluegrass (<i>Poa pratensis L.</i>) under osmotic and temperature stresses were determined in the laboratory. As polyethylene glycol (PEG) 8000 concentrations was increased from 50 to 250 g/L, percent germination was reduced. Propiconazole at 0, 0.5, 0.9, and 1.9 …
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The Effects of Multispecies Grazing on Pasture Management and Utilization
… (Dactylis glomerata L.), Kentucky bluegrass (Poa pratensis L.), and white clover (Trifolium repens L.). Exclosures were utilized as controls. Data included forage quality, composition, availability, height, visual weed cover and live ground cover, and thistle consumption, collected every 15 …
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Developing Techniques to Quantify Phenological Development of Smooth Brome (Bromus inermis Leyss.): Sampling Variability
… (Bromus inermis Leyss.) and Kentucky bluegrass (Poa pratensis L.) is a critical issue for land managers in the Northern Great Plains. Recent surveys of US Fish and Wildlife Service (USFWS) grasslands revealed fragments of native prairie and widespread invasion of two exotic cool-season grasses, …
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Field Measurements of Denitrification From Fertilizer Applied to Turfgrass
… silt loam soil under Kentucky bluegrass (Poa pratensis L.) or creeping bentrgrass (Agrostis palustris Huds). Atmospheric samples were collected daily (data extrapolated to a 24-h period) for the duration of each experiment and analyzed by mass spectrometric procedures. Data reported …
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Evaluation of Novel Techniques to Control Annual Grasses in Intensively Managed Turfgrass Systems
… evaluate novel techniques for Annual bluegrass (Poa annua L.), goosegrass (Eleusine indica L. Gaertn.), and smooth crabgrass (Digitaria ischaemum Schreb.) control on golf course putting greens or putting green surrounds. Hybrid bermudagrass Cynodon transvaalensis Burtt. Davy. x dactylon L. Pers.) …
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Phenological and Cultural Studies of Common Dandelion (Taraxacum officinale Weber)
… and 2) overseeding with Kentucky bluegrass (Poa pratensis L.). Sub-treatments were: 1) no clipping, 2) clipping at 4 cm each week, 3) clipping at 4 cm every two weeks, 4) clipping at 8 cm each week, and 5) clipping at 8 cm every two weeks. Sod competition significantly reduced both the number …
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Physiology and Growth Responses of Cool Season Turfgrasses Treated With Trinexapac -Ethyl or Paclobutrazol
… PAC were applied to a mature Kentucky bluegrass (Poa pratensis L.) sward at 0.5x, 1x, and 1.5x, where x equals the label rate, as single applications in spring, summer, or fall and clippings collected for 10 weeks after application. Carbon exchange rates (CERs) and leaf area were measured weekly …
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Establishment Method and Cultural Practice Effects on Sports Turf
… japonica Stued.), and Kentucky bluegrass (Poa pratensis L.) grown on a native- soil (Captina silt loam) and sand-based (13 cm sand-capped) rootzone. The experiment was conducted at the Arkansas Agricultural Research and Extension Center, in Fayetteville, Arkansas, during the growing seasons …
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Determining Water Requirements in Turfgrass Systems
… among cultivars of Kentucky bluegrass (Poa pratensis L.) and tall fescue (Festuca arundinacea Schreb.) 2) determine the water use of Kentucky bluegrass as affected by cultivar, irrigation frequency, and soil texture; 3) and determine the reference evapotranspiration (ETo) percent …
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Influence of plant growth regulators on turfgrass polar lipid composition, tolerance to drought and salinity stresses, and nutrient efficiency
… found in PPC and FSE-treated Kentucky bluegrass (Poa pratensis L.) than in the control (without PGR treatments). This effect was greater at lower than at higher fertilization levels. The utilization efficiency of some major nutrient elements also was higher in PPC and FSE-treated bluegrass than in …
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Water Conservation Practices for Irrigation of Turfgrass Lawns
… arundinacea Schreb.; TF) and Kentucky bluegrass (Poa pratensis L.; KBG) under field conditions; 3) investigate field performance differences between KBG varieties, varying in drought-resistance, under variable amounts of deficit irrigation; 4) evaluate the impact of irrigation frequency on the …
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