SHORT COMMUNICATION: Methane emission from a usually well-drained prairie soil after snowmelt and precipitation

1995 ◽  
Vol 75 (2) ◽  
pp. 239-241 ◽  
Author(s):  
F. L. Wang ◽  
J. R. Bettany
Keyword(s):  
Key Words ◽  
Methane Emission ◽  
Short Communication ◽  
Short Term ◽  
Prairie Soil ◽  
Lower Slope ◽  
Grassland Site ◽  
Spring Snowmelt ◽  
Static Chamber Technique ◽  
Chamber Technique

Usually well-drained soils, when they are flooded periodically, are a sporadic source for greenhouse gases such as methane. Using a static chamber technique in the field, we found methane emission, which ranged from 7.8 (cultivated site) to 10.5 mg m−2 d−1 (grassland site), from the lower slope positions after snowmelt in the spring. Smaller methane emission was also observed after rainfall in the summer: 0.02–0.64 mg m−2 d−1 after 23–79 mm of precipitation. Key words: Methane emission, spring snowmelt, short-term flooding

SHORT COMMUNICATION: Difficulties in using 137Cs to measure erosion in stubble-mulched soil

1995 ◽  
Vol 75 (3) ◽  
pp. 357-359 ◽  
Author(s):  
E. Bremer ◽  
H. H. Janzen ◽  
E. de Jong
Keyword(s):  
Soil Erosion ◽  
Key Words ◽  
Short Communication ◽  
Crop Rotations ◽  
Present Evidence ◽  
Southern Alberta ◽  
Communication Difficulties ◽  
Cesium 137

Soil erosion may be difficult to quantify from redistribution of 137Cs at sites where stubble-mulch techniques were adopted prior to 137Cs deposition, because appreciable 137Cs may have been transported before it was mixed into the soil Ap layer. We present evidence that this occurred in two long-term cropping experiments in southern Alberta. Key words: Cesium-137, tillage, long-term crop rotations, fallow

I limiti del tempo in un tempo di limiti

2009 ◽  
pp. 55-62
Author(s):  
Fabrizio Rizzi
Keyword(s):  
Health System ◽  
Key Words ◽  
Community Service ◽  
National Health ◽  
National Health System ◽  
Short Term ◽  
Intellectual Honesty ◽  
Life Itself ◽  
Environmental Limits

- This article recounts the doubts and fears of an experienced analyst who is now an apprentice acrobat. He is forced to keep himself tiredly balanced between psychological and physical limits imposed by age, restrictions introduced by the National Health System and categories of patients who have precedence over others. He cannot receive all of the patients who ask for him and even those who he does receive will have to be discharged in the short term. Explaining to them, with intellectual honesty, that the community service has rules that limit his wishes as well. What can this be if not acrobatics? In the end it means combining the contradictory but perhaps also the most real aspects of life itself. [KEY WORDS: desires, personal and environmental limits, truth of the therapist]

scholarly journals Asexual Propagation of Eggplant (Solanum melongena L.) through Encapsulated Axillary Buds

1970 ◽  
Vol 19 (2) ◽  
pp. 263-288 ◽  
Author(s):  
A.K.M. N. Huda ◽  
, M.A. Bari ◽  
M. Rahman
Keyword(s):  
Key Words ◽  
Plant Tissue ◽  
Short Communication ◽  
Solanum Melongena ◽  
Axillary Buds ◽  
Synthetic Seed ◽  
Asexual Propagation

 Key words: Auxillary buds, Eggplant, Encapsulation, Synthetic seed D.O.I. 10.3329/ptcb.v19i2.5445 Plant Tissue Cult. & Biotech. 19(2): 263-288, 2009 (December)       - Short communication

scholarly journals Short communication: The effect of linseed oil and DGAT1 K232A polymorphism on the methane emission prediction potential of milk fatty acids

2018 ◽  
Vol 101 (6) ◽  
pp. 5599-5604 ◽  
Author(s):  
S. van Gastelen ◽  
E.C. Antunes-Fernandes ◽  
K.A. Hettinga ◽  
J. Dijkstra
Keyword(s):  
Fatty Acids ◽  
Methane Emission ◽  
Short Communication ◽  
Linseed Oil ◽  
Milk Fatty Acids

scholarly journals The illusion of universality: The use of Nordic population registers in studies of migration, employment and health

2020 ◽  
pp. 140349482094591
Author(s):  
Karl Gauffin
Keyword(s):  
Gold Standard ◽  
Short Communication ◽  
Social Epidemiology ◽  
Short Review ◽  
Informal Employment ◽  
Short Term ◽  
Hidden Population ◽  
Continuous Quality ◽  
And Migration ◽  
Term Labour

Aims: Nordic register material is often considered to be a gold standard for studies of social epidemiology and population health, but it comes with certain limitations. This short communication aims to draw attention to lacking coverage as a potentially growing problem of Nordic register material. Methods: The article is based on a short review of previous studies and commentaries on the strengths and limitations of Nordic register data with a particular focus on studies of employment and migration. Results: In times of institutional and demographic change in the Nordic countries, the assumption of universal register coverage can be challenged. Precarious and informal employment arrangements, important social determinants of health, provide a good illustration of the problem. Work that is carried out in the semi-legal margins of the labour market, sometimes by a ‘hidden population’ of non-resident, short-term labour immigrants, will not be covered by the registers. Researchers may therefore run the risk of misrepresenting reality if they maintain the belief that population registers cover the entire population. Conclusions: The Nordic registers are an extraordinary resource for public health researchers, but continuous quality control and assessment of validity and completeness will be crucial to maintain relevance in a transitioning society.

SHORT COMMUNICATION: Herbicides in surface runoff and groundwater under surface irrigation in southern Alberta

1995 ◽  
Vol 75 (1) ◽  
pp. 145-148 ◽  
Author(s):  
J. J. Miller ◽  
N. Foroud ◽  
B. D. Hill ◽  
C. W. Lindwall
Keyword(s):  
Key Words ◽  
Surface Runoff ◽  
Short Communication ◽  
Surface Irrigation ◽  
Groundwater Samples ◽  
Southern Alberta

In 1991, up to 38 g L−1 hexazinone was found in 50% of surface runoff and 27% of groundwater samples at Lethbridge. No herbicides were detected in surface runoff from irrigation at Taber, but 2,4-D, bromoxynil, dicamba, mecoprop, MCPA and diclofop were found in 48, 34, 21, 16, 13 and 9%, respectively, of groundwater samples, and bromoxynil exceeded the Canadian drinking guideline (5.0 μg L−1) in 11% of samples. Key words: Herbicides, surface irrigation, surface runoff, groundwater

Technique for Tagging Small Fish with I131 for Evaluation of Predator–Prey Relationships

1978 ◽  
Vol 35 (1) ◽  
pp. 143-145 ◽  
Author(s):  
Gerard J. FitzGerald ◽  
Miles H. A. Keenleyside
Keyword(s):  
Content Analysis ◽  
Key Words ◽  
Stomach Content ◽  
Stomach Content Analysis ◽  
Small Fish ◽  
Short Term ◽  
Predator Prey ◽  
Cichlasoma Nigrofasciatum ◽  
Quantitative Studies ◽  
Convict Cichlids

Experiments to test the feasibility of using radioactive I131 as a technique for evaluation of conspecifïc predation on fry by adult convict cichlids (Cichlasoma nigrofasciatum) are described. The technique is useful for short-term quantitative studies of predator–prey interactions where it is not possible to observe and quantify predation directly or where stomach content analysis of adults is not feasible. Key words: radioactive tagging, predator–prey interactions, Cichlasoma nigrofasciatum

SHORT COMMUNICATION: Persistence of imazethapyr in two Atlantic Canada soils

1995 ◽  
Vol 75 (4) ◽  
pp. 525-527 ◽  
Author(s):  
K. I. N. Jensen ◽  
J. A. Ivany ◽  
R. R. King
Keyword(s):  
Key Words ◽  
Half Life ◽  
Short Communication ◽  
Limit Of Detection ◽  
Atlantic Canada ◽  
Soil Persistence ◽  
Rotation Crops ◽  
One Year

The half-life of imazethapyr in two Atlantic Canada soils ranged from 19 to 63 d. Soil incorporation increased persistence but residual levels reached or approached the limit of detection (< 5 ng g−1 soil) within 120 d after application of 75 g ha−1 imazethapyr. Sensitive rotation crops were not affected by 75 g ha−1 imazethapyr one year after application. Key words: Imazethapyr, soil persistence, carryover, half-life

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