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  • Author or Editor: Leonard P. Perry x
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Many have been involved with broadcast television, and others will be, and most have been involved with video production either at home or work. As a powerful educational and motivational tool for teaching, research and extension, it deserves more and improved use.

Opportunities will be discussed for broadcast television, with a short video presentation of examples, including regular shows, periodic features or interviews, “live” call-ins, or tips using video or slides. Video production will be covered in more depth including general tips, technical aspects such as formats and equipment, and artistic aspects which make the difference between just filming and producing a quality production. Covered will be basics of lighting, audio, camera use, and editing--the real key to a professional quality production.

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Mean yields (stems per plant) of 5 randomly selected plants from a block of 15 were determined for each of 13 species of 2–year old herbaceous perennials. Mean yields of Achillea filipendulin a `Coronation Gold' of 4 randomly selected plants, in each of 4 replicates in a randomized c-o-replete block design, were determined over 3 years for 3 spacings. The most consistent yields over the period, and highest in years 1 and 3, were from 60cm spacing between plant centers, with yields from 90cm and 30cm highly variable. In year 2, stems were graded by length with most stems 40 to 49cm at 30cm and 90cm spacings (19 and 46 stems) and 50 to 50cm at 60cm (27 stems). As stems per plant increased from 30 to 72 for 30cm to 90cm spacing, respectively, stems per 30cm2 decreased from 30 to 8. Vaselife was greatest (9 days) for stems in Oasis preservative, with less in Floralife (8 days), tap water (7 days), or distilled water (5 days). Flowers 10 days older prior to cutting lasted an average 2 days less.

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Even though herbaceous perennials have been field produced for many years, there is no general nutrient recommendation for specific fertility level as related to soil type. A survey of Vermont perennial growers indicated that a variety of fertilization methods are in use (Perry and Sanders, 1983). Commercial recommendations vary: 7.8 g N/m2 from 8N–3.5P–6.7K once annually (Sinnes, 1979); 12.2 g N/m2 from 5N–4.4P–4.2K for established plants (Sinnes, 1981; Wyman, 1977); 34.2 g N/m2 from Osmocote 14N–6.2P–11.6K for plants sensitive to fertilizer, 68.5 g N/m2 for nursery stock, and 136.8 g N/m2 for greenhouse crops (Sierra, 1980).

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Our future horticulture students are growing up in an electronic world, and are gaining knowledge increasingly from computers, videotapes and television, and decreasingly from books and other written media. We need to understand their interests and motivations in order to determine how to market our educational programs to them. This study profiles our future students on several career-oriented factors, including their plans after high school, their academic interests, their impressions of and experiences in agriculture and horticulture, and the sources of information they look to when seeking assistance in choosing a career track. Results compare male vs. female students, urban vs. rural students, regional differences, and differences between fifth and tenth graders (critical ages in career decision-making).

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Crown divisions of Campanula takesimana were potted 1 Sept. 1994 and were grown under natural conditions until 19 Nov., when they were moved into a 3 °C greenhouse. On 15 Feb. 1995, 10 plants were randomly assigned to each of four temperature treatments (−5, −8, −11, and −14 °C), using each of four freeze acclimation procedures designated A through D: group A plants were held at treatment temperatures for 30 minutes; group B plants were first subjected to three alternating freeze-thaw cycles (−3 °C for 24 hours, 3 °C for 24 hours), then held at treatment temperatures for 30 min; plants in group C were held at −1 °C for 14 days and subsequently were exposed to treatment temperatures for 30 minutes; group D plants were held at treatment temperatures for 48 hours. A control group was held at 3 °C for the duration of the study. Following 6 weeks regrowth at 15 °C, plants were rated for survival and regrowth quality relative to unfrozen controls. At treatment temperatures of −8 °C and less, acclimation procedure significantly influenced survival and regrowth quality. Plants exposed to three freeze-thaw cycles had the highest regrowth ratings at treatment temperatures less than −5 °C, with no loss in marketability following exposure to −11 °C. In addition, all plants exposed to freeze-thaw cycles thrived following controlled freezing, whereas those in each of the other groups displayed a decline in survival with decreasing treatment temperatures. Holding plants for 14 d at −1 °C had no beneficial effect on survival or regrowth quality relative to plants held at constant above-freezing temperatures. Increasing exposure duration from 30 minutes to 48 hours significantly reduced regrowth quality at treatment temperatures of −8 °C and −11 °C.

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Salt injury was induced by 5% (w/v) NaCl drenching on Hibiscus hamabo Sieb. & Zucc. and H. syriacus L. seedlings. Total chlorophyll content of H. hamabo was higher than that of H. syriacus. Uniconazole (0.0, 0.5, 1.0, and 5.0 mg·liter–1) treatment increased and 25- or 50-mg·liter–1 GA3 treatment decreased chlorophyll content of H. hamabo. Total chlorophyll content of H. syriacus was not affected by uniconazole or GA3. Total carbohydrate content of H. syriacus was more accumulated than that of H. homabo. Total carbohydrate content of H. hamabo was more decreased than that of H. syriacus by Ca (13.35 or 133.5 mM), uniconazole, or GA3 in relation to total carbohydrate contents. Protein contents of H. hamabo were higher than those of H. syriacus. Uniconazole or GA3 increased those of H. hamabo and decreased those of H. syriacus. Peroxidase activity of H. hamabo was higher than that of H. syriacus. Uniconazole decreased that of H. hamabo and increased that of H. syriacus. GA3 or Ca (13.35 mM) treatment increased that of both species. ATPase activity of H. hamabo was higher than that of H. syriacus. Uniconazole (5 mg·liter–1), GA3, or Ca decreased that of H. hamabo increased that of H. syriacus.

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