Download or read book Response of Kentucky Bluegrass Poa Pratensis L Strains to Fertility and Management written by Julian Magnus Sund and published by . This book was released on 1965 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Response of Three Kentucky Bluegrass Poa Pratensis L Cultivars to Liquid Fertilizer Programs written by Richard Wayne Moore and published by . This book was released on 1994 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Weed Control and Fertilization on Botanical Composition and Forage Yields of Kentucky Bluegrass Pasture written by Elroy John Peters and published by . This book was released on 1971 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Kentucky Bluegrass Poa Pratensis L Seed Yield and Vegetative Responses to Post harvest Residue Management and Timing of Fall Nitrogen Application written by Peggy F. Lamb and published by . This book was released on 1998 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Growth of Roots Rhizomes and Tillers of Kentucky Bluegrass Poa Pratensis L Cultivars and Genotypes as Affected by Fertility Level Cutting Height and Season written by Frank Edward Smith and published by . This book was released on 1973 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effects of Plant Growth Regulators on Kentucky Bluegrass Poa Pratensis L and Supina Bluegrass P Supina Schrad in Reduced Light Conditions written by John C. Stier and published by . This book was released on 1997 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Growth and Quality of Kentucky Bluegrass Poa Pratensis L as Influenced by Urea Foliar and Soil Fertilization written by Abdelsalam Osman Abdelrahman and published by . This book was released on 1982 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Growth and Reproductive Development in Selected Cultivars of Kentucky Bluegrass Given Different Durations of Exposure to Floral Inductive Conditions written by J. Kevin Turner and published by . This book was released on 1980 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: Kentucky bluegrass (Poa pratensis L.) cultivars are known to differ quantitatively in their photothermal floral inductive requirements. The extent to which these requirements are met influences the potential for subsequent panicle exsertion. A better understanding of the inductive requirements as they vary among cultivars would aid in the selection and management of cultivars for maximum seed yields. This study was designed to evaluate the response of three Kentucky bluegrass cultivars to differing floral inductive exposure durations in controlled environment chambers and in two contrasting climatic areas. Plants of three Kentucky bluegrass cultivars 'Bristol', 'Victa', and 'Vantage' were exposed to inductive conditions in a controlled environment chamber for periods ranging from 25 to 209 days. Tillers of these plants were labelled to record their emergence dates at monthly intervals during the inductive period. Plants of each cultivar were also exposed to the field inductive conditions in two climatic areas for periods ranging from 23 to 161 days. The quantitative nature of induction at each area was examined by observing the plants for the number of panicles produced and for the rate of panicle exsertion after transfer from the field to controlled environment chambers programmed to promote floral initiation. Changes in leaf area (LA), leaf number per tiller and specific leaf weight (SLW) were also evaluated. The two areas, Madras and Gervais, differed climatically during the fall and winter inductive season. Night temperatures were lower and light energy levels were higher at Madras than at Gervais. Leaf area measurements demonstrated that more growth occurred for the plants grown at Gervais. The Gervais plants had fewer leaves per tiller than the Madras plants. A significant interaction between cultivars and locations was observed for the rate of panicle exsertion. The environment at Gervais was more favorable for Bristol, relative to Victa and Vantage than that of Madras in terms of the number of panicles exserted per plant and the rate of panicle exsertion. Controlled environment studies showed that Victa was most dependent on tillers which had emerged early for subsequent panicle production. In contrast, panicle production in Bristol and Vantage was equally distributed among tillers of each emergence date. The seed yields of varieties such as Bristol and Vantage, which can exsert panicles from late formed tillers may benefit by placement into production areas which promote fall and winter growth.
Download or read book Seed Dormancy Germination and Seedling Vigor of Some Kentucky Bluegrass Poa Pratensis L Varieties as Affected by Environmental and Endogenous Factors written by James Dale Maguire and published by . This book was released on 1969 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: Seed of Cougar and Newport Kentucky bluegrass (Poa pratensis L.) was harvested at Pullman and Spokane at several stages of maturity. Variations in seed attributes resulting from environmental and maturity effects were evaluated through germination tests, tetrazolium staining, seed moisture and seed weight determinations. Seedling vigor was determined by .speed of germination and seedling growth rate measurements. Inherent differences were observed between the two varieties. Cougar seed germinated higher initially and had greater seedling vigor compared to Newport. Stage of seed maturity at harvest did not significantly influence vigor. Post-harvest dormancy was more prevalent in Newport than Cougar and affected the relative performance of the two varieties when seedling vigor was evaluated. This dormancy dissipated with time. Endogenous germination rhythms of several months duration existed in both varieties. Two maximum and two minimum cycles occurred during the nine months after harvest. This attribute affected the expression of potential viability. The pattern was not influenced by germination temperatures, seed maturity or storage conditions. Oxygen absorption, water uptake and total respiration were not significantly affected by the seed coat nor appendages. These factors apparently did not produce the observed varietal variations. Inherent genetic variations in response to environmental variables accounted for performance differences.
Download or read book Effect of Urease Inhibitors and Cationic Materials on Growth Response and Ammonia Volatilization Following Fertilization of Kentucky Bluegrass Poa Pratensis L with Urea written by Young Kyoo Joo and published by . This book was released on 1987 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Yield and Nutrient Response of Four Popular Fertilizers Applied to Kentucky Bluegrass Poa Pratensis written by Michael G. Bablitch and published by . This book was released on 1981 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Management of Hybrid Bluegrass Poa Arachnifera Torr X Poa Pratensis L in the Transition Zone written by and published by . This book was released on 2006 with total page 159 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dura Blue[superscript TM] and Thermal Blue[superscript TM] hybrid bluegrass (Poa arachnifera Torr. x Poa pratensis L.) have been selected for increased heat and drought tolerance and offer an alternative to traditional Kentucky bluegrass and tall fescue in the transition zone. DuraBlue and Thermal Blue were compared to Apollo[superscript TM] Kentucky bluegrass, Dynasty[superscript TM] tall fescue, and Kentucky 31 tall fescue. All turfgrass species tested were acceptable for use in the transition zone. Thermal Blue should be seeded from 50 to 150 kg seed/ha. Thermal Blue should be seeded in September for highest quality and most rapid turf cover. However, January and April provided complete turf cover 7 months after seeding. Thermal Blue should be fertilized with 100 to 300 kg N/ha/yr. However, higher nitrogen fertility reduced turf quality in late summer and early fall. Thermal blue can be mowed at heights from 20 to 50 mm, although, mowing heights should be [greater than, less than] 35 mm to avoid decreased turf quality in the late summer and fall. Applications of the plant growth regulators ethephon and paclobutrazol caused injury to Thermal Blue during the summer and should be avoided. Thermal Blue exhibited a significant reduction in cover (>57%) from dithiopyr, oryzalin, oxadiazon, pendimethalin, prodiamine, quinclorac, and trifluralin applied at turf seeding. Postemergence applications of foramsulfuron and trifloxysulfuron on established Thermal Blue decreased turf quality and caused unacceptable injury (>15%). Established Thermal Blue treated with clethodim, fluazifop-p-butyl, and sethoxydim showed decreased quality and unacceptable injury (>15%). Hybrid bluegrass is thought to have increased heat tolerance based on greater total nonstructural carbohydrate (TNC) accumulation. Thermal Blue hybrid bluegrass, Apollo Kentucky bluegrass, Supranova[superscript TM] supina bluegrass, and Laser[superscript TM] rough bluegrass showed linear decreases in TNC accumulation in the leaves from April to July. However, hybrid bluegrass and Kentucky bluegrass showed a linear increase in TNC accumulation in the roots from April to July. This research indicated that hybrid bluegrass and Kentucky bluegrass may have more heat tolerance due to a reallocation of TNC from the leaves in April to the roots in July.
Download or read book Manipulating Gas Exchange Rates of Kentucky Bluegrass Poa Pratensis L Using Surfactants and Fungicides written by Dane R. Williamson and published by . This book was released on 1983 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Forage Management in the North written by Dale Smith and published by . This book was released on 1981 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Selected Turf Reproductive and Disease Response Characteristics in Crossed and Selfed Progenies of Kentucky Bluegrass Poa Pratensis L written by Gerard William Pepin and published by . This book was released on 1971 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Shoot Development in Kentucky Bluegrass Poa Pratensis L as Influenced by Post harvest Residue Management written by Gary Michael Picha and published by . This book was released on 1976 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bibliography of Agriculture written by and published by . This book was released on 1976 with total page 1732 pages. Available in PDF, EPUB and Kindle. Book excerpt:
