Iryna McDonald

ORCID: 0000-0002-4515-3305
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About
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Research Areas
  • Ruminant Nutrition and Digestive Physiology
  • Agronomic Practices and Intercropping Systems
  • Turfgrass Adaptation and Management
  • Soil Carbon and Nitrogen Dynamics
  • Pasture and Agricultural Systems
  • Agricultural Productivity and Crop Improvement
  • Forest ecology and management
  • Forest Management and Policy
  • Legume Nitrogen Fixing Symbiosis
  • Soybean genetics and cultivation
  • Agricultural Science and Fertilization
  • Ecology and Vegetation Dynamics Studies
  • Environmental Conservation and Management
  • Bioenergy crop production and management
  • Plant responses to water stress
  • Agriculture and Rural Development Research
  • Plant Physiology and Cultivation Studies
  • Fire effects on ecosystems
  • Forest Biomass Utilization and Management
  • Seedling growth and survival studies
  • Tree Root and Stability Studies
  • Crop Yield and Soil Fertility
  • Agroforestry and silvopastoral systems
  • Rangeland and Wildlife Management

Fort Hays State University
2021-2024

Kansas State University
2017-2021

Newcastle University
1977

AgResearch
1973

Centre for Agricultural Research
1972

Alfalfa (Medicago sativa L.) is an important forage legume grown in Kansas, USA and its productivity with cool-season grasses however unknown. The objective of this study was to determine the dry matter yield (DMY) nutritive value alfalfa-grass mixtures compared those alfalfa monoculture without nitrogen fertilization. Three different varieties were planted (reduced-lignin alfalfa, Roundup Ready, conventional alfalfa) two kinds (smooth brome, Bromus inermis Leyss, tall fescue, Festuca...

10.5187/jast.2021.e33 article EN cc-by-nc Journal of Animal Science and Technology 2021-01-04

Abstract The effects of inoculation and pelleting on the establishment oversown white clover (Trifolium repens) were investigated at three sites in tussock grasslands Otago. At all was negligible absence (only 4% or less healthy seedlings). Clover low (18-33% seedlings) when seed inoculated normal commercial rate either 1 17 days after inoculation, increasing level to 5-times significantly increased two sites. highest (71-88% obtained ‘Prillcote’ pelleted sown 3 20 inoculation. responses...

10.1080/03015521.1973.10427637 article EN New Zealand Journal of Experimental Agriculture 1973-06-01

(1) Trimmed tillers, excised roots and laminae of tall fescue were subjected to various temperatures down 12 0C for exposure times at cooling warming rates. Damage tillers was assessed by their regrowth over a period 40 days. conductivity method. (2) Excised froze about -3 3 C trimmed 08 'C; these are above those which significant damage occurred. Roots 0 5 0C, close that caused (-I C). Laminae attached potted plants -7-4 'C. (3) Conductivity measurements suggested there range leaf root only...

10.2307/2402784 article EN Journal of Applied Ecology 1978-12-01

Information is lacking about the effect of date a fall cut alfalfa (Medicago sativa L.) on dry matter yield (DMY), forage nutritive value, and stands persistence. The objective this study was to determine timing DMY, value stand persistence three varieties: low-lignin Hi–Gest 360, Roundup Ready Tonica, conventional Gunner in Northeastern Kansas United States. field carried out by splitting plot randomized complete block design with four replications. harvesting data different maturity stages...

10.5187/jast.2021.e65 article EN cc-by-nc Journal of Animal Science and Technology 2021-07-01

Maturation process of alfalfa (Medicago sativa L.) could be prevented by the reduction lignin content in terms conventional breeding or transgenic technology. Alfalfa exhibit higher leaf/stem ratio, with a concern yield loss. The objective this study was to compare forage and nutritive value low two reference varieties subjecting harvest intervals three seeding rates. experimental design randomized complete block split-split plot arrangement four replicates, where (28-day 35-day) were...

10.5187/jast.2021.e97 article EN cc-by-nc Journal of Animal Science and Technology 2021-09-01

Results are given for trials investigating the effects of inoculation and pelleting on establishment white clover oversown in autumn 1971 1972. In absence inoculation, few plants established. Inoculation at normal commercial rate increased pescentage healthy but was still low, Pelleting establishment. both years, a commercially prepared "triplecote" pellet gave better seedling than pellets with methyl cellulose adhesive. one trial conducted 1972, gum arabic adhesive coated lime or...

10.33584/jnzg.1972.34.1341 article EN Proceedings of the New Zealand Grassland Association 1972-01-01

White clover (Trifolium repens), red (T. pratense), subtcrrnnean subterraneum) and alsike hybridum) were sown singly or in combinations at three sites Otago. Ryegrass (Lolium perenne) was included all treatments also alone. Lucerne (Medicago sativa) alone two sites. Herbage dry matter production measured over a three-year period. At the high fertility lnvermay site, white clovers gave similar total legume markedly superior to subterranean clovers. nlsike most productive higher altitude, low...

10.33584/jnzg.1975.37.1433 article EN Proceedings of the New Zealand Grassland Association 1975-01-01

Forest fires are key ecological factors affecting pine forests globally. Understanding impacts of varying fire intensities on forest ecosystem components is crucial for predicting recovery and informing management. This study aimed to assess effects different surface structural forests, including tree canopy, herbaceous layer, soil horizons, identify relationships between intensity parameters. The examined three areas with (severe, moderate, mild) 1 year after a in Ukraine's Volyn-Polissia...

10.1007/s10980-024-02022-8 article EN cc-by-nc-nd Landscape Ecology 2024-12-30

Pitau and Huia white clovers were sown with two rates of Ruanui, Ariki Manawa ryegrass on high fertility soil at Invermay Agricultural Research Centre lower Traquair. Although clover establishment in the treatments was comparable with, or superior to that treatments, latter tended have a denser growth habit, particularly during spring. Overall, there little difference total annual dry matter production between but yields varied considerably all trials. first years later position reversed.

10.33584/jnzg.1972.34.1343 article EN Proceedings of the New Zealand Grassland Association 1972-01-01

Abstract Ryegrass was sown alone and in combination with white, red, subterranean, or alsike clovers small plots at 3 sites Otago. At 2 lucerne also sown. Plots were cut regularly over a 3-year period, all herbage removed. Nitrogen yields measured harvested separated into ryegrass legume components. Relative to other species, terms of N uptake, white clover performed well sites, especially Berwick, moist cool site; Berwick moderately Invermay (intermediate climatic conditions) Dunback (dry...

10.1080/03015521.1977.10425967 article EN New Zealand Journal of Experimental Agriculture 1977-09-01

The Cross-Timbers is a forested region that stretches from southern Kansas to central Oklahoma and into Texas. As an essential transitional ecotone between the eastern forest Great Plains grassland biomes, this crucial for maintaining biological diversity. Much of land not actively managed critical ecosystem services benefit people living in region. face threats natural anthropogenic factors, including climate variability. lack proper management (prescribed fires thinning’s) has resulted...

10.58809/jsje5583 article EN 2023-01-01

The objective of this study was to evaluate the effect planting alfalfa (Medicago sativa L.) with- and without cover crops on forage dry matter yield nutritive values in Kansas, USA. In first production year 2014, mono-culture appears be compatible or even higher than with certain species winter annual forages as a crop. Alfalfa planted combination four different multi-species such oats (Avena L.), oilseed radish (Raphanus sativus ryegrass (Lolium multiflorumL.), turnip (Brassica rapa had...

10.5296/jas.v5i2.11408 article EN Journal of Agricultural Studies 2017-06-16
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