Zobrazeno 1 - 10
of 40
pro vyhledávání: '"Doyle A. Smittle"'
Autor:
Donald R. Sumner, Ronald D. Gitaitis, J. Danny Gay, Doyle A. Smittle, Bryan W. Maw, Ernest W. Tollner, Yen Con Hung
Publikováno v:
Plant Disease. 81:885-891
Populations of soil fungi from fields planted to sweet onion were assayed on selective media. In pathogenicity tests, Rhizoctonia solani AG-4, Pythium irregulare, and Phoma terrestris were the fungi most virulent on onion seedlings. Plots were fumiga
Publikováno v:
Communications in Soil Science and Plant Analysis. 25:943-954
Automated Dumas methods could replace Kjeldahl digestions for the analysis of nitrogen (N), but few comparisons of these methods for plant tissue are available. Because N nutrition usually affects tissue levels of N, the influence of analytical metho
Publikováno v:
Journal of the American Society for Horticultural Science. 119:20-23
Cabbage (Brassica oleracea L.) was grown in drainage lysimeters under controlled soil water regimes during 3 years. Three irrigation regimes were imposed on cabbage grown on two soil types during the spring and fall growing seasons. Irrigation regime
Publikováno v:
Journal of Plant Nutrition. 16:2341-2351
’Shogoin’ turnip plants (Brassica rapa L.) were grown in sand culture under five nitrate:ammonium (NO3:NH4) ratios (N:N of 1:0, 3:1, 1:1, 1:3, 0:1). The leaves expressed symptoms of NH4 toxicity (reduced growth and curly leaves with dark‐green
Publikováno v:
Journal of the American Society for Horticultural Science. 118:726-730
An irrigation scheduling model for turnip (Brassica rapa L.) was validated using a line-source irrigation system in a 2-year field trial. The model used a water balance, a variable root length, and a crop factor function of plant age (i). Evapotransp
Publikováno v:
Communications in Soil Science and Plant Analysis. 24:1609-1616
The influence of catalyst (containing K2SO4/Cu/Ti, K2SO4/Se or Se alone), sample weight (0.2 or 0.4 g), and digestion blocks (Tecator DS 1015–20 or Tecator DS 1016‐ 40) on the Kjeldahl‐nitrogen (N) determination in pecan, corn, and turnip leave
Publikováno v:
Journal of Plant Nutrition. 16:1215-1228
Irrigation scheduling of leafy greens generally consists of applying 19 mm of water every four days, which leads to irrigation depths that exceed the soil water deficit, and requires fertilizer applications higher than recommended rates. We determine
Publikováno v:
Journal of Plant Nutrition. 15:2727-2741
Watermelon (Citrullus lunatus Thunb.) plants cv ‘Sugar Baby’ were grown hydroponically in a greenhouse under NO3:NH4 ratios of 3:1, 1:1, and 1:3. Plants receiving the high ammonium treatment expressed symptoms of NH4‐toxicity and declined rapid
Autor:
M. Darlene Mercer, Doyle A. Smittle
Publikováno v:
Journal of the American Society for Horticultural Science. 117:930-933
Gemini II' cucumber (Cucumis sativus L.) fruits were stored for 2, 4, or 6 days at 5 and 6C in 1989 and for 5 days at SC or 10 days at 3C in 1990. Chilling injury (CI) symptoms were rated after 2 to 4 days at 25C. Cell wall polysaccharide concentrati
Publikováno v:
Journal of the American Society for Horticultural Science. 117:717-720
An irrigation scheduling model for summer squash (Cucurbita pepo L.) was developed and validated during 1986, 1987, and 1989. The model is represented by the equation: 12.7(i - 4) × 0.5ASW = D i-1 + (E(0.14 + 0.015) - P - I) i, where crop age in day