scholarly journals DIURNAL CHANGES IN WATER RELATIONS AND ABSCISIC ACID IN FIELD-GROWN VITIS VINIFERA CULTIVARS. II. ABSCISIC ACID CHANGES UNDER SEMI-ARID CONDITIONS

1984 ◽  
Vol 97 (1) ◽  
pp. 37-47 ◽  
Author(s):  
B. R. LOVEYS ◽  
H. DURING
Keyword(s):  
Abscisic Acid ◽  
Vitis Vinifera ◽  
Water Relations ◽  
Diurnal Changes ◽  
Arid Conditions ◽  
Semi Arid

The Water Relations of Barley Grown Continually or After Fallow Under Semi-Arid Conditions

1994 ◽  
Vol 30 (4) ◽  
pp. 431-439 ◽  
Author(s):  
P. I. Orphanos ◽  
C. Metochis
Keyword(s):  
Water Stress ◽  
Grain Yield ◽  
Water Relations ◽  
Experimental Period ◽  
Water Requirement ◽  
Annual Rainfall ◽  
Arid Conditions ◽  
Semi Arid

SUMMARYGrain barley was grown either continually or in rotation with fallow in a 12-year experiment. Annual rainfall ranged from 120 to 297 mm. As the water requirement of the crop is 240 mm, growth in most seasons occurred under water stress. The amount of water conserved under fallow was only significant (75–100 mm) in three of the 12 years and only once did the water conserved increase barley yield in the following year. The total grain yield over the experimental period was twice as high in the barley–barley sequence as in the barley–fallow sequence.Cultiuo continuo de cebada o después de barbecho

scholarly journals Type of Trellis Affects Radiation Absorption and Must Composition but not Yield of `Petite Sirah' Grapes

HortScience ◽  
1992 ◽  
Vol 27 (1) ◽  
pp. 20-22 ◽  
Author(s):  
T.H. Morsil ◽  
A.D. Matthias ◽  
J.L. Stroehlein
Keyword(s):  
Vitis Vinifera ◽  
Photosynthetically Active Radiation ◽  
Total Dissolved Solids ◽  
Radiation Absorption ◽  
Alcohol Content ◽  
Dissolved Solids ◽  
Active Radiation ◽  
Fruit Composition ◽  
Arid Conditions ◽  
Semi Arid

The effects of trellising on absorption of photosynthetically active radiation (PAR, 400- to 700-nm wavelength) by foliage and fruits, on fruit composition, and yield were studied in 1988 under semi-arid conditions using field-grown Vitis vinifera L. `Petite Sirah' grapevines in a mature vineyard. A vertical inclination was obtained by attaching shoots to a vertically arranged three-wire trellis; 60° shoot inclination from horizontal was obtained by attaching shoots to a “V-type” Tatura trellis; a standard two-wire trellis (control) was used in which shoots attached to the upper wire were permitted to orient downward to the vineyard floor. PAR absorption by foliage during mid-morning to mid-afternoon periods was highest in the standard trellis and lowest in the Tatura trellis. PAR available for absorption by fruits was lowest in the standard trellis and highest in the Tatura trellis. Analysis of fruit composition at harvest revealed that total dissolved solids (°Brix) was significantly higher for berries from the Tatura trellis than for the vertical trellis or the control. The Tatura trellis resulted in the highest alcohol content of wine. Per-vine yields did not differ significantly among the three trellis systems.

Water Relations of Field Grown Cotton and Sorghum: Temporal and Diurnal Changes in Leaf Water, Osmotic, and Turgor Potentials 1

Crop Science ◽  
1977 ◽  
Vol 17 (1) ◽  
pp. 76-80 ◽  
Author(s):  
R. C. Ackerson ◽  
D. R. Krieg ◽  
T. D. Miller ◽  
R. E. Zartman
Keyword(s):  
Water Relations ◽  
Leaf Water ◽  
Diurnal Changes

Triazine carryover in semi-arid conditions

1990 ◽  
Vol 9 (6) ◽  
pp. 429-432 ◽  
Author(s):  
O.A. Chivinge ◽  
B. Mpofu
Keyword(s):  
Arid Conditions ◽  
Semi Arid
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