Zobrazeno 1 - 10
of 11
pro vyhledávání: '"David A. Alm"'
Publikováno v:
Weed Technology. 14:713-717
Reduced herbicide inputs can diminish pesticide movement into water supplies, enhancing environmental quality. A 3-yr study was conducted to evaluate the efficacy and economic viability of reducing herbicide inputs by using ultra-low rates (ULRs), co
Autor:
R. Gordon Harvey, Jack Dekker, Randy L. Anderson, Robert G. Wilson, Douglas D. Buhler, John Cardina, Karen A. Renner, Sharon A. Clay, Frank Forcella, David M. Alm, Robert J. Kremer
Publikováno v:
Weed Science. 45:67-76
Field experiments, conducted from 1991 to 1994, generated information on weed seedbank emergence for 22 site-years from Ohio to Colorado and Minnesota to Missouri. Early spring seedbank densities were estimated through direct extraction of viable see
Publikováno v:
Weed Technology. 7:763-770
A survey determined the views of individuals in seven groups comprising the weed science community in the corn belt (primarily in Illinois) for importance of 8 environmental and 14 crop production issues and 16 weed species in setting weed science re
Publikováno v:
Weed Technology. 7:560-569
We present a germination and emergence model that can be used as a sub-model in an individual-based model of population dynamics. Seed germination and seedling elongation rates were measured in petri dishes in the laboratory for ivyleaf morningglory,
Autor:
John Cardina, Douglas D. Buhler, Robert G. Wilson, Karen A. Renner, Frank Forcella, Jack Dekker, David A. Alm, Robert G. Harvey
Publikováno v:
Weed Science. 40:636-644
Seedbanks and seedling emergence of annual weeds were examined in arable fields at eight locations in the Corn Belt. Seed densities were estimated by direct seed extraction from each of several soil cores in each sampled plot. Average total seedbank
Publikováno v:
Annals of Botany. 69:87-92
A morphologically explicit numerical model for analysing water uptake by individual roots was developed based on a conductor network, with specific conductors representing axial or radial conductivities for discrete root segments. Hydraulic conductiv
Autor:
David M. Alm, Park S. Nobel
Publikováno v:
Annals of Botany. 67:59-65
Water uptake and root respiration for the desert succulent Agave deserti, were predicted in the laboratory and in the field using a model based on root hydraulic conductivity and the rate of maintenance respiration previously determined in the labora
Autor:
J. D. Hesketh, David Kramer, Antony R. Crofts, Robert R. Wise, James R. Frederick, David M. Alm, Donald R. Ort
Publikováno v:
Plant, Cell and Environment. 13:923-931
The diurnal cycling of leaf water potential (Ψleaf) in field-grown sunflower (Helianthus annuus) was used to investigate the cause of water deficitinduced limitation of net photosynthesis. Daily midafternoon decreases in Ψleaf of up to 1.5 MPa and
Autor:
James R. Frederick, David M. Alm, Antony R. Crofts, J. D. Hesketh, Donald R. Ort, Robert R. Wise, David Kramer
Publikováno v:
Photosynthesis Research. 26:213-222
Simultaneous, non-invasive measurements were made of the rate of photosynthetic CO2 fixation and the state of activation of the chloroplast CF1CF0-ATP synthase (CF) in field-grown sunflower (Helianthus annuus L.) during the dark-to-light transition a
Autor:
H. Michael Harrington, David M. Alm
Publikováno v:
Plant Physiology. 88:618-625
Cultured tobacco cells (Nicotiana tabacum L. var Wisconsin-38) developed tolerance to otherwise nonpermissive 54°C treatment when heat-shocked at 38°C (2 h) but not at 42°C. Heat-shocked cells (38°C) exhibited little normal growth when the 54°C