Results 271 to 280 of about 200,037 (304)

NOTE ON THE DETERMINATION OF LEAF WATER‐POTENTIAL

New Phytologist, 1967
SummaryA simplified modification of the micro‐osmometer of Macklon and Weatherley (1965a) for the determination of depressions of water‐potential in leaves, ΔW (DPD), is described.The apparent minimum ΔW of 31/2 atm for non‐transpiring water‐culture plants of Ricinus communis reported by Tinklin and Weatherley (1966) is considered further.
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The Evaluation of a Leaf-Water Potential Function for Corn

Transactions of the ASAE, 1981
ABSTRACT AN attempt was made in 1978 to estimate leaf-water potential from soil and atmospheric parameters with a simplified, theoretically based model explaining water movement thru the soil-plant-atmosphere system. The soil water potential at a 30 cm depth and the vapor pressure deficit were used as variables.
null F. R. Lamm, null J. M. Gregory, null H. S. Cengiz   +2 more
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Isopiestic Technique: Measurement of Accurate Leaf Water Potentials

Science, 1966
Sunflower leaf tissue of known potential was obtained by equilibrating an interveinal leaf sample, at constant temperature in air, with a potential determined by sucrose solutions. Equilibration occurred within 17 hours. Except for one determination, all measurements of the water potential of the equilibrated samples with an isopiestic technique were ...
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Relation of Soybean Leaf Water Potential to Soil Water Potential¹

Agronomy Journal, 1974
AbstractEstimation of plant water potential is a possible aid in irrigation scheduling. This work examined the relation of maximum and minimum soybean (Glycine max (L.) Merr.) leaf water potential to soil water potential. Maximum readings were taken near sunrise and minimum readings were taken between 1300 and 1500 CDT.
R. A. Brady, W. L. Powers, L. R. Stone, S. M. Goltz   +3 more
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Psychrometric Measurement of Leaf Water Potential: Lack of Error Attributable to Leaf Permeability

Science, 1965
A report that low permeability could cause gross errors in psychrometric determinations of water potential in leaves has not been confirmed. No measurable error from this source could be detected for either of two types of thermocouple psychrometer tested on four species, each at four levels of water potential.
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Psychrometric Water Potential Analysis in Leaf Discs

1989
The importance of water potential (Ψ), and its components, in studies of plant-water relations is well recognized (Kramer 1983; Turner and Burch 1983). Although numerous methods are currently available for monitoring plant-water status, the use of thermocouple psychrometers for the determination of leaf Ψ under both field and laboratory conditions is ...
D. M. Oosterhuis, S. D. Wullschleger
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A LIMIT IN THE USE OF PREDAWN LEAF WATER POTENTIAL FOR TREE IRRIGATION

Acta Horticulturae, 1997
The development of practical field criteria for timing water supply is required to improve crop productivity. Among all the proposed methods for measuring plant water status, the predawn leaf water potential, PLWP, seems to be the most simple physiological indicator.
Ameglio, Thierry, Archer, Philippe, Cruiziat, P., Daudet, F.A., Valancogne, Charles, Dayau, Sylvia, Cohen, M.   +6 more
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Measurement of Leaf Water Potential by the Dye Method

Ecology, 1967
The dye method for measuring leaf water potential is simple, inexpensive, and suitable for both laboratory and field work. Leaves are immersed in a graded series of solutions, and the solution which neither gains nor loses water is assumed to have a water potential equal to that of the leaf.
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Contact angle of water droplets in relation to leaf water potential

Agricultural and Forest Meteorology, 1988
Abstract The relationship between the contact angle of distilled water droplets and leaf water potential was measured as a function of time of day on three different types of leaf surfaces. Leaves of dry edible beans (Phaseolus vulgaris L.) were representative of a corrugated, relatively waxless surface; soybean leaves (Glycine max L.) were ...
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Leaf water potential-leaf water deficit relationship for ten species of a semiarid grassland community

Plant and Soil, 1994
The relationship between water potential and relative water content (water content in percentage of full hydration) is a characteristic of plant tissues, that may vary with environmental conditions. It is used here to compare leaf water relations of ten species coexisting in a semiarid grassland community (Festucetum vaginatae danubiale) in Hungary ...
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