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Part III. Studies the effect of temperature on the rates of leaf growth and tiller production of Festuca arundinacea. Leaf appearance and primordia production; Leaf length and cell length; Lamina width and area.

The after-effect of wind on photosynthesis and transpiration of Festuca arundinacea Schreb., was determined. Following a period of exposure in a controlled environment wind tunnel the wind-treated plants showed reduced rates of photo-synthesis when compared with the controls under standard conditions. Evaporation from paper model tillers was measured and the boundary layer resistance was shown to be low in all but very low wind speeds. Analysis of CO2 and H2O diffusion pathways indicated that mesophyll resistance in wind-treated plants was higher whilst leaf surface resistance was lower than in the controls. The high mesophyll resistance in the wind-treated plants was attributed to reduced water content. [ABSTRACT FROM AUTHOR]

Examines the effects of a range of combinations of different day and night temperatures on growth attributes of S.170 tall festuca arundinacea. Effect of temperatures on the leaf area ratio; Important growth attributes of the plant; Optimal temperature regimes for the various attributes of plant growth.

Presents a study to evaluate the effect of constant temperature on the growth of tall fescue. Changes in leaf width of tall fescue due to temperature; Optimum temperature for most aspects of leaf growth of a tall fescue; Correlation between leaf elongation and the ambient temperature.

Presents a comparison of three varieties of the plant tall fescue, S.170 from the Great Britain and Syn I and Syn II from North Africa in 1962. Reasons for smaller growth rate of S.170 as compared to Syn I and Syn II; Cause for death of tillers of S.170, Syn I and Syn II; Effect of auxins on the production of tillers by a grass plant; Seasons when the rate of tiller production in S.170 increased; Various differences between the varieties.

Reports on an experiment conducted to study the changing tiller population of spaced plants of S.170 Festuca Arundinacea. Methods employed in the study; Seasonal patterns of tiller production; Effects of competition and flowering on tiller numbers and the production of herbage; Effects of environment and nutrition on flowering.

Studies the effects of light, temperature and daylength on the form, growth and net assimilation rate of the S.170 variety of tall fescue from the Great Britain and Syn I and Syn II varieties from North Africa as of 1968. Reason for small relative growth rate of S.170 in winter; Factors influencing rate of leaf growth of S.170; Implications of shading for relative growth rate and net assimilation rate of the varieties.

Compares the accumulation of dry weight and expansion of leaf area of S.170, a variety of the plant tall fescue from the Great Britain and Syn II variety from North Africa in 1963-64. Reason for production of less dry matter by S.170 during winter in England than Syn II; Factors influencing relative growth rate of Syn II; Relationship of the ability of the varieties to survive low temperatures with their ability to grow rapidly during winters.

Compares the Great Britain and North African varieties of tall fescue (Featuca Arundinacea). Effect of temperature and daylight in the growth of leaf; General aspects of leaf growth; Analyses of ecotypic differences in tall fescue.

Concerns with seasonal changes in relative growth rate and its components, net assimilation rate and leaf area ratio in seedling material of Mediterranean and north European populations of grasses Lolium pernne, Dactylis glomerata and Festuca arundinacea. Climatic origins of grasses; Leaf development in the same populations of Lolium and Dactylis under contrasting light and temperature environments.

The article describes the occurrence of losses in livestock from ergot poisoning due to infected grass in the southwest of England. Lolium perenne and Lolium multiflorum are the species most frequently attacked, although infection is common on Festuca arundinacea, Festuca pratensis, Holcus lanatus and Agropyron repens. The date of germination was determined in 1956 for ergots which were harvested and placed outside in pots containing vermiculite, and also for those which occurred naturally in the field. Ergots were considered to have germinated when the stromata first became visible. The first signs of germination are the development of small longitudinal cracks from which the stromata are eventually developed. A period of about seven days normally elapses between the first appearance of the stromata and the development of mature ascospores.