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1. Copper and Molybdenum Nutrition of Crops Grown on Acid Sphagnum Peat Soil

Author:
D. C. MacKay; E. W. Chipman; U. C. Gupta
Source:
Soil Science Society of America journal 1966 v.30 no.6 pp. 755-759
ISSN:
0361-5995
Subject:
Allium cepa; Brassica oleracea; Daucus carota; Lactuca sativa; Sphagnum; Spinacia oleracea; antagonism; carrots; cauliflower; copper; lettuce; molybdenum; nutrients; nutrition; onions; pH; peat soils; plant tissues; spinach; toxicity
Abstract:
... Five crops, carrot, onion, spinach, cauliflower and lettuce (Daucus carota L., var. sativa D. C.), (Allium cepa L.), (Spinacia oleracea L.), (Brassica oleracea, var. botrytis L.), (Lactuca sativa, var. capitata L.).] were grown successively in pails of virgin sphagnum peat soil receiving 6 rates of Cu and 5 of Mo in a replicated factorial experiment. The soil was limed to slightly above pH 5.0 and ...
DOI:
10.2136/sssaj1966.03615995003000060028x

2. Studies of Water Requirements of Horticultural Crops: II. Influence of Drought at Different Growth Stages of Onion

Author:
B. R. de Lis; I. Ponce; J. B. Cavagnaro; R. M. Tizio
Source:
Agronomy journal 1967 v.59 no.6 pp. 573-576
ISSN:
0002-1962
Subject:
Allium cepa; agronomy; bulbs; drought; horticulture; onions; seedlings
Abstract:
... Two years of field experiments with onion crops (Allium cepa, L.) show that this plant is differentially sensitive to drought in each stage of its vegetative cycle. Drought at the seedling stage increases the rate of foliar emergence, produces a greater number of leaves, accelerates bulb formation by 15 days, and increases the final weight as compared with the check (no significant difference). Wh ...
DOI:
10.2134/agronj1967.00021962005900060025x

3. Estimating Leaf Area from Length Measurements for Hybrid Granex Onion

Author:
Glenn J. Hoffman
Source:
Agronomy journal 1971 v.63 no.6 pp. 948-949
ISSN:
0002-1962
Subject:
Allium cepa; climate; hybrids; leaf area; leaf length; onions; relative humidity; salinity; temperature
Abstract:
... A logarithmic linear relationship was found between leaf length and area for onion (Allium cepa L. ‘F-l Hybrid Yellow Granex’) grown from seed in sunlit climate chambers with controlled temperature and humidity. Atmospheric relative humidity and root medium salinity had no effect on the relationship. ...
DOI:
10.2134/agronj1971.00021962006300060038x

4. Internal Water Status and Water Transport in Seed Onion Plants

Author:
A. A. Millar; W. R. Gardner; S. M. Goltz
Source:
Agronomy journal 1971 v.63 no.5 pp. 779-784
ISSN:
0002-1962
Subject:
Allium cepa; environmental factors; florets; leaf water potential; leaves; onions; soil water; soil water potential; stomatal conductance; stomatal movement; umbels; water flow
Abstract:
... Water potential, transpiration rate, and stomatal resistance of the various parts of the onion (Allium cepa L.) plant were measured under field and controlled conditions. Water potentials of florets and pedicels were always lower than leaf water potentials. Water potential difference between the florets and the soil of as much as ∗9 bars were found. The greatest drop in water potential was found b ...
DOI:
10.2134/agronj1971.00021962006300050037x

5. Suppression of onion thrips with systemic-insecticide soil treatments

Author:
Getzin, L.W.
Source:
Journal of economic entomology 1973 v.66 no.4 pp. 975-977
ISSN:
0022-0493
Subject:
Delia antiqua; fensulfothion; Allium cepa; carbofuran; soil treatment; Thrips tabaci
DOI:
10.1093/jee/66.4.975

6. Ultraviolet Radiation Reflectance, Transmittance, and Absorptance by Plant Leaf Epidermises

Author:
H. W. Gausman; R. R. Rodriguez; D. E. Escobar
Source:
Agronomy journal 1975 v.67 no.5 pp. 720-724
ISSN:
0002-1962
Subject:
Agave americana; Allium cepa; Kalanchoe laciniata; Opuntia engelmannii var. lindheimeri; Peperomia obtusifolia; Yucca; leaves; onions; ozone; reflectance; stratosphere; tissues; transmittance; ultraviolet radiation; wavelengths
Abstract:
... Partial destruction of ozone in the earth's upper atmosphere (stratosphere) will increase levels of ultraviolet (UV) radiation that reach the earth's surface; consequently, plants could be exposed to harmful amounts of UV-B radiation (280 to 320 nm). The objective of our research was to characterize the reflectance, transmittance, and absorptance of UV-B radiation by leaf epidermises. Accordingly, ...
DOI:
10.2134/agronj1975.00021962006700050036x

7. Seed Coating, Precision Planting, and Sprinkler Irrigation for Optimum Stand Establishment

Author:
Frank E. Robinson; Keith S. Mayberry
Source:
Agronomy journal 1976 v.68 no.4 pp. 694-695
ISSN:
0002-1962
Subject:
Allium cepa; Beta vulgaris; Daucus carota; Lactuca sativa; agronomy; carrots; germination; lettuce; onions; planting; sandy clay loam soils; sprinkler irrigation; stand establishment; sugar beet; California
Abstract:
... The legal prohibition of the short handled hoe in California has forced a change in the conventional practice of surplus-seedling and subsequent thinning to achieve optimum stands with lettuce (Lactuca sativa L.) and sugar beet crops (Beta vulgaris L.). Precision placement of coated seed was evaluated as an alternate method of stand establishment with five crops grown on Meloland sandy clay loam w ...
DOI:
10.2134/agronj1976.00021962006800040043x

8. Onion-Seed Yield and Quality as Affected by Irrigation Management

Author:
M. J. Brown; J. L. Wright; R. A. Kohl
Source:
Agronomy journal 1977 v.69 no.3 pp. 369-372
ISSN:
0002-1962
Subject:
Allium cepa; furrow irrigation; furrows; irrigation management; pollination; scalding; seed quality; seed weight; seed yield; soil water; sprinkler irrigation; temperature; tensiometers; umbels; vigor; Idaho
Abstract:
... The effects of soil moisture, sprinkler irrigation, and misting (5 min at 30-min intervals) on hybrid onion-seed (Allium cepa L.) production were evaluated at Kimberly, Idaho. Sprinkling and misting treatments were included to determine if sprinkler irrigation could be used for onion-seed production, and if evaporative cooling (misting) would alleviate the scalding of umbels at excessively high te ...
DOI:
10.2134/agronj1977.00021962006900030009x

9. Onion conditioning pertaining to larval preference, survival and rate of development in delia (=hylemya) antiqua

Author:
G. Zurlini; A. S. Robinson
Source:
Entomologia experimentalis et applicata 1978 v.23 no.3 pp. 279-286
ISSN:
0013-8703
Subject:
Allium cepa; Delia; larvae; onions
Abstract:
... Using onion conditioned by Delia (=Hylemya) antiqua larvae for four different periods of time and larvae of four different ages, the effect of conditioned or fresh onion on larval preference was studied. It was shown that of the sixteen combinations tested, nine larval groups showed a preference for conditioned onion, five showed no preference and two showed a preference for fresh onion. Significa ...
DOI:
10.1111/j.1570-7458.1978.tb02746.x

10. Potassium Uptake by Onion Roots Characterized by Potassium/Rubidium Ratio

Author:
V. C. Baligar; S. A. Barber
Source:
Soil Science Society of America journal 1978 v.42 no.4 pp. 618-622
ISSN:
0361-5995
Subject:
Allium cepa; Zea mays; corn; exchangeable potassium; mass flow; onions; potassium; root hairs; rubidium; soil
Abstract:
... A common belief is that plant roots absorb cations from the solution phase of the soil. Experiments with corn (Zea mays L.) using K/Rb ratio to evaluate the source of K and Rb absorbed indicated the plant roots absorbed these ions in the ratio of exchangeable K and Rb. The objective of this research was to study the source of K and Rb absorbed from soil by onion (Allium cepa) roots since they do n ...
DOI:
10.2136/sssaj1978.03615995004200040017x

11. Comparison of the onion plant (allium cepa) and onion tissue culture: i. alliinase activity and flavour precursor compounds

Author:
C. SELBY; I. J. GALPIN; H. A. COLLIN
Source:
new phytologist 1979 v.83 no.2 pp. 351-359
ISSN:
0028-646X
Subject:
Allium cepa; amino acid metabolism; amino acids; bulbs; callus; crushing; enzymes; flavor; onions; tissue culture
Abstract:
... The system for flavour production in the onion consists of the enzyme alliinase and the flavour precursors, the S‐alkyl‐L‐cysteine sulphoxides. Flavour production in the onion and in the callus were compared by looking at each part of the system in turn. Measurement of the specificity and Kₘ values of the alliinase from onion bulb and callus showed the enzymes to be identical. The total amino acid ...
DOI:
10.1111/j.1469-8137.1979.tb07459.x

12. Contribution of Mycorrhizae to P Nutrition of Crops Growing on an Oxisol

Author:
R. S. Yost; R. L. Fox
Source:
Agronomy journal 1979 v.71 no.6 pp. 903-908
ISSN:
0002-1962
Subject:
Allium cepa; Brassica; Eutrustox; Glycine max; Manihot esculenta; Stylosanthes hamata; Vigna unguiculata; absorption; agronomy; fumigation; mycorrhizae; nutrient uptake; phosphates; plant growth
Abstract:
... Most plant species, including the major crops, form symbiotic mycorrhizal associations between their roots and certain fungi which influence nutrient uptake, especially P, from infertile soils. HOW well-supplied the phosphate must be before mycorrhizae cease to enhance P uptake is not known; nor have the effects of mycorrhizae on external P requirements of crops been adequately determined in the f ...
DOI:
10.2134/agronj1979.00021962007100060002x

13. Onion Response to Lime on Acid Histosols as Affected by Ca/Mg Ratios

Author:
W. van Lierop; Y. A. Martel; M. P. Cescas
Source:
Soil Science Society of America journal 1979 v.43 no.6 pp. 1172-1176
ISSN:
0361-5995
Subject:
Allium cepa; Histosols; acid soils; calcium; crop yield; hydrochloric acid; liming; magnesium; onions; sulfuric acid; vegetable growing
Abstract:
... The objectives of this work were to determine critical ratios and concentrations of Ca and Mg in Histosols as related to onion (Allium cepa L.) growth and composition. The molar Ca/Mg ratios extracted from soils were related to those found in onion and indicated that onion assimilated Mg more easily than Ca. Although the upper critical Ca/Mg ratio was not found, yields decreased rapidly as extract ...
DOI:
10.2136/sssaj1979.03615995004300060023x

14. Response of Onions to P Placement

Author:
J. R. Mulkey; E. L. Albach; F. J. Dainello
Source:
Agronomy journal 1979 v.71 no.6 pp. 1037-1040
ISSN:
0002-1962
Subject:
Allium cepa; Calciustolls; onions; phosphorus; phosphorus fertilizers; plant development; planting; seedling growth; seedlings; vigor
Abstract:
... Considerable variation in seedling size, vigor, and plant development occurs in onions (Allium cepa L.) where phosphate fertilizers are surface-applied and incorporated prior to planting. Our objective was to determine the influence of P rates and placement techniques on the growth and development of fall-seeded onions. During the fall of 1975 and 1977, two rates of P (21.8 and 43.6 kg/ha) were ba ...
DOI:
10.2134/agronj1979.00021962007100060034x

15. Improved Growth of Onion and Bell Pepper in Saline Soils by Two Vesicular-Arbuscular Mycorrhizal Fungi

Author:
Marc C. Hirrel; J. W. Gerdemann
Source:
Soil Science Society of America journal 1980 v.44 no.3 pp. 654-655
ISSN:
0361-5995
Subject:
Allium cepa; Capsicum annuum; Gigaspora margarita; Glomus; mycorrhizal fungi; onions; saline soils; salinity; salt tolerance; sweet peppers; vesicular arbuscular mycorrhizae
Abstract:
... The effect of 5 levels of salinity on the growth of onions (Allium cepa L. cv. ‘Early Yellow Globe’) and bell peppers (Capsicum annuum L. cv. ‘California Wonder’) inoculated with the mycorrhizal fungi, Glomus fasciculatus or Gigaspora margarita, was compared to uninoculated nonmycorrhizal controls. In soils with saturation extracts (ECe) of 1, 3, 4, 6, and 12 mmho/cm, mycorrhizal plants consistent ...
DOI:
10.2136/sssaj1980.03615995004400030046x

16. Controlled Cooling of Onion Umbels by Periodic Sprinkling

Author:
J. L. Wright; J. L. Stevens; M. J. Brown
Source:
Agronomy journal 1981 v.73 no.3 pp. 481-490
ISSN:
0002-1962
Subject:
Allium cepa; agronomy; air temperature; bulbs; cooling; field experimentation; florets; humidity; hybrids; onions; pollination; silt loam soils; sprinkler irrigation; umbels; wind speed; Idaho
Abstract:
... Low onion (Allium cepa L.) seed yields frequently occur without obvious reasons, particularly with hybrid varieties. Solutions to the problem need to be found to insure seed for bulb onion production. Water and temperature stress in the umbel may be factors during hot, dry, sunny weather. We investigated the relationship of umbel temperature to ambient and umbel conditions and the effects of perio ...
DOI:
10.2134/agronj1981.00021962007300030021x

17. Influence of Mycorrhizal Fungi on the Mineral Nutrition and Yield of Onion in Saline Soil

Author:
J. C. Ojala; W. M. Jarrell; J. A. Menge; E. L. V. Johnson
Source:
Agronomy journal 1983 v.75 no.2 pp. 255-259
ISSN:
0002-1962
Subject:
Allium cepa
Abstract:
... In a number of studies, salt-affected plants have been found to contain lower P concentrations than non-salinized control plants. This study was performed to evaluate the ability of two vesicular-arbuscular mycorrhizal fungi (VAM) to improve the yield and salt tolerance of onion (Allium cepa L. var. Burpee hybrid 5276) by facilitating P uptake from a saline soil. Onion was grown in a Delhi loamy s ...
DOI:
10.2134/agronj1983.00021962007500020023x

18. Spécificité des substances non volatiles des allium responsables de la ponte de la teigne du poireau, acrolepiopsis assectella (lepidoptera)

Author:
AUGER, J.; THIBOUT, E.
Source:
Entomologia experimentalis et applicata 1983 v.34 no.1 pp. 71-77
ISSN:
0013-8703
Subject:
Acrolepiopsis assectella; Alliaria petiolata; Allium cepa; Allium porrum; Apiaceae; Brassica napus; Brassica oleracea var. capitata; Iris (Iridaceae); Tulipa; bioassays; cabbage; females; garlic; host plants; leaves; leeks; methanol; onions; organic sulfur compounds; oviposition; plant extracts
Abstract:
... SUMMARY: Specificity of non-volatile compounds eliciting leek moth (Acrolepiopsis assectellaj oviposition behaviour Leek moth females oviposit only when in contact with plants of the genus Allium (Liliaceae). The possible reasons for this specific stimulation were investigated using extracts of different plant species. The bioassay with filter paper and isolated mated females is described. Methano ...
DOI:
10.1111/j.1570-7458.1983.tb03292.x

19. Daily mitotic cycle in the common onion, Allium cepa

Author:
Stephens, C.E.
Source:
Cytologia 1984 v.49 no.4 pp. 679-684
ISSN:
0011-4545
Subject:
Allium cepa; mitosis; regression analysis
DOI:
10.1508/cytologia.49.679

20. Laboratory tests for leaf resistance to Botrytis squamosa in onions

Author:
Currah, L.; Maude, R.B.
Source:
Annals of applied biology 1984 v.105 no.2 pp. 277-283
ISSN:
0003-4746
Subject:
Allium cepa; disease resistance; Botrytis; leaves
DOI:
10.1111/j.1744-7348.1984.tb03051.x