References
- Alvena , G. and Marstorp , H. 1993 . Effect of a ryegrass catch crop on soil inorganic‐N content and simulated nitrate leaching . Swedish J. Agric. Res. , 23 : 3 – 14 .
- Cooper , J.O. 1952 . Studies on growth and development in Lolium. III. Influence of season and latitude on ear emergence . J. Ecol. , 40 : 352 – 359 .
- Eckersten , H. and Jansson , P.E. 1991 . Modeling water flow, nitrogen uptake and production for wheat . Fert. Res. , 27 : 313 – 329 .
- Frank , A.B. and Hofmann , L. 1989 . Relationship among grazing management, growing degree‐days and morphology development for native grasses on the Northern Great Plains . J. Range Mgt. , 42 : 199 – 202 .
- Gillen , R.L. and Ewing , A.L. 1992 . Leaf development of native bluestem grasses in relation to degree‐day accumulation . J. Range Mgt. , 45 : 200 – 204 .
- Griffith , S.M. Tall fescue dry matter partitioning and seed yield components in response to lodging . Proceedings of the XVII International Grassland Congress . New Zealand. pp. 1642 – 1643 .
- Griffith , S.M. and Streeter , D.J. 1994 . Nitrate and ammonium nutrition in ryegrass: Changes in growth and chemical composition under hydroponic conditions . J. Plant Nutr. , 17 : 71 – 81 .
- Griffith , S.M. , Alderman , S.C. and Streeter , D.J. 1996 . Italian ryegrass and nitrogen source fertilization in western Oregon in two contrasting climatic years. II. Plant nitrogen accumulation and soil nitrogen status . J. Plant Nutr. , 20 (4&5) : 429 – 439 .
- Hebblethwaite , P.D. , Wright , D. and Noble , A. 1980 . “ Some physiological aspects of seed yield in Lolium perenne L. (Perennial ryegrass) ” . In Seed Production, Proceedings 28th Easter School in Agricultural Science, University of Nottingham , Edited by: Hebblethwaite , P.D. 71 – 90 . London, , England : Butterworth and Co. .
- Horneck , D. and Hart , J.M. 1988 . “ A survey of nutrient uptake and soil test values in perennial ryegrass and turf type tall fescue fields in the Willamette valley ” . In Seed Production Research , Edited by: Young , W. 13 – 14 . Corvallis, OR : Oregon State University Extension and USDA‐ARS .
- Russelle , M.P. , Wilhelm , W.W. , Olson , R.A. and Power , J.F. 1984 . Growth analysis based on degree days . Crop Sci. , 24 : 28 – 32 .
- Young , W.C. 1988 . Seed yield and yield components of Pennfine perennial ryegrass as influenced by time of spring N and chemical dwarfing , Corvallis, OR : Oregon State University . Ph.D. Dissertation
- Youngberg , H. Techniques of seed production in Oregon . Seed Production, Proceedings 28th Easter School in Agricultural Science, University of Nottingham . Edited by: Hebblethwaite , P.D. pp. 203 – 213 . London, , England : Butterworth and Co. .
- Joint contribution from the United States Department of Agriculture, Agricultural Research Service and Oregon State University Agriculture Experiment Station (Paper No. 10874, Scientific Journal Series).
- Corresponding author (e‐mail address: [email protected]).