scholarly journals Trends in the variability of potato tuber yield under selected land and soil characteristics

2019 ◽  
Vol 65 (No. 3) ◽  
pp. 111-117 ◽  
Author(s):  
Mahnaz Zare ◽  
Aitazaz Farooque ◽  
Farhat Abbas ◽  
Qamar Zaman ◽  
Melanie Bos
Keyword(s):  
Organic Carbon ◽  
Moisture Content ◽  
New Brunswick ◽  
Potato Tuber ◽  
Prince Edward Island ◽  
Tuber Yield ◽  
Soil Characteristics ◽  
Volumetric Moisture Content ◽  
The Mean

The objective of this study was to evaluate variations in potato tuber yield with the selected land and soil characteristics including (i) topography (elevation and slope); (ii) geometry (horizontal coplanar geometry (HCP)and perpendicular coplanar geometry (PRP)); (iii) hydrology (volumetric moisture content; θv), and (iv) chemistry (phosphate, potash, organic carbon; organic carbon and pH). Analyses of the data collected across four potato fields, two each in Prince Edward Island and New Brunswick (NB), showed that the tuber yield negatively correlated with the field slope and positively correlated with most of the soil characteristics studied. Field elevation affected yield only under certain conditions such as higher range of elevation (≥ 7 m) (Field 2 in NB). Among soil characteristics, only HCP and PRP correlated with field elevation. The slope and elevation explained 22% to 36% variability of yield. Investigations of yield and topography by zonal analysis showed that yield was lower in zones of higher slope or elevation and lower θv, as the mean θv decreased in zones with a higher slope.

scholarly journals Contribution of Climate Extremes to Variation in Potato Tuber Yield in Prince Edward Island

2020 ◽  
Vol 12 (12) ◽  
pp. 4937
Author(s):  
Junaid Maqsood ◽  
Aitazaz A. Farooque ◽  
Xander Wang ◽  
Farhat Abbas ◽  
Bishnu Acharya ◽  
...  
Keyword(s):  
Potato Tuber ◽  
Prince Edward Island ◽  
Management Practices ◽  
Tuber Yield ◽  
Statistical Significance ◽  
Research Question ◽  
Climate Extremes ◽  
Agricultural Management ◽  
Daily Minimum Temperature ◽  
Climate Extreme

Agricultural management practices are responsible for almost two-thirds of the variations in potato tuber yield. In order to answer the research question about the remaining variability of the tuber yield, we hypothesized that climate extremes partly explain the missing component of variations of the tuber yield. Therefore, this research attempts to bridge this knowledge gap in order to generate a knowledge base for future strategies. A climate extreme dataset of the Prince Edward Island (PEI) was computed by averaging the data of five meteorological stations. In detail, changing patterns of 20 climate extreme indices were computed with ClimPACT2 software for 30 years (1989-2018) data of PEI. Statistical significance of the trends and their slope values were determined with the Mann-Kendall test and Sen’s slope estimates, respectively. Average of daily mean temperature (TMm), mean daily minimum temperature (TNm) and the occurrence of continuous dry days (CDD), significantly increased by 0.77 °C, 1.17 °C and 3.33 days., respectively, during the potato growing seasons (May-October) of the past three decades. For this period daily temperature range (DTR), frost days (FD), cold days (TX10p), cold nights (TN10p) and warmest days (TXx) showed decreasing trends of −1.01 °C, −3.75 days, −5.67 days, −11.40 nights, and −2.00 days, respectively. The principal component analysis showed that DTR, TXx, CDD, and TNm were the main factors affecting seasonal variations of tuber yield. The multiple regression model attributed ~39% of tuber yield variance to DTR, TXx, CDD, and TNm. However, these indices explained individually 21%, 19%, 16%, and 4% variation to the tuber yield, respectively. The remaining variation in the tuber yield explained by other yield affecting factors. The information generated from this study can be used for future planning about agricultural management strategies in the Island, for example, the provision of water resources for supplemental irrigation of crops during dry months.

THE BIOLOGY OF CANADIAN WEEDS. 2. SPIRAEA LATIFOLIA

1974 ◽  
Vol 54 (1) ◽  
pp. 141-147 ◽  
Author(s):  
I. V. HALL ◽  
R. A. MURRAY ◽  
L. P. JACKSON
Keyword(s):  
Soil Moisture ◽  
Moisture Content ◽  
New Brunswick ◽  
Prince Edward Island ◽  
Soil Moisture Content ◽  
Mechanical Damage ◽  
Growing Season ◽  
Eastern Canada ◽  
Vaccinium Angustifolium ◽  
Lowbush Blueberry

Spiraea latifolia (Ait.) Borkh., broad-leaved meadowsweet (Rosaceae), is a weed of pastures, lowbush blueberry (Vaccinium angustifolium Ait. and V. myrtilloides Mich.) fields and cranberry (V. macrocarpon Ait.) bogs of Eastern Canada, especially where soil moisture content is high during the growing season. Where S. latifolia occurs, other vegetation is lacking or depressed. Much time is lost in harvesting lowbush blueberries due to jamming of the S. latifolia stems among the tines of the rake or in cranberries due to mechanical damage to the harvesters. In Canada, S. latifolia occurs in Newfoundland, Prince Edward Island, Nova Scotia, New Brunswick, Quebec, Ontario, and Manitoba.

Effects of Hay Mulch on Soil Properties and Potato Tuber Yield under Irrigation and Nonirrigation in New Brunswick, Canada

2012 ◽  
Vol 138 (8) ◽  
pp. 703-714 ◽  
Author(s):  
Zisheng Xing ◽  
Pat Toner ◽  
Lien Chow ◽  
Herb W. Rees ◽  
Sheng Li ◽  
...  
Keyword(s):  
New Brunswick ◽  
Soil Properties ◽  
Potato Tuber ◽  
Tuber Yield

Soil nitrate profile and response of potatoes to fertilizer N in relation to time of incorporation of lupin (Lupinus albus)

1994 ◽  
Vol 74 (2) ◽  
pp. 241-246 ◽  
Author(s):  
J. B. Sanderson ◽  
J. A. MacLeod
Keyword(s):  
Green Manure ◽  
Prince Edward Island ◽  
Tuber Yield ◽  
Solanum Tuberosum L ◽  
Lupinus Albus ◽  
Potato Production ◽  
Nitrate N ◽  
Early Fall ◽  
The Mean ◽  
The Impact

Lupin (Lupinus albus L. ’Ultra’) was evaluated as a green manure crop the year preceding potato production on Prince Edward Island for 3 yr. One pass of tandem disc was used to incorporate lupin green manure on 1 September (early) or 1 October (late). Barley residue following combine harvest was also incorporated in the same way in early September. One treatment of lupin was left unharvested with no fall incorporation (none), and in another treatment of lupin the seed was fall harvested with no fall incorporation. All treatments were moldboard plowed the following spring. Potato (Solanum tuberosum L. ’Russet Burbank’) was planted with three rates of nitrogen (0, 50, and 200 kg ha−1) band applied. Tuber yield and tuber N content increased with increasing rates of N applications in all incorporation treatments. Following late incorporated lupin, potato had higher tuber yield at 0 N than following the early incorporated lupin, while both treatments were higher than barley. Potato petiole nitrate-N levels and the mean spring nitrate-N concentrations in the soil were lower following barley than following lupin, and generally lower following early compared to late incorporation of lupin green manure. These data indicate the time of fall incorporation of a legume can have a significant effect on the N response of a succeeding crop. Early fall incorporation can result in significant fall N mineralization and winter leaching. Research on N response after legumes in rotation should consider the impact of time and method of residue incorporation. Key words: Petiole nitrate-N, nitrate leaching, green manure

‘They’re a very sick group of individuals’: Correctional officers, emotions, and sex offenders

2016 ◽  
Vol 21 (3) ◽  
pp. 380-394 ◽  
Author(s):  
Dale Spencer ◽  
Rose Ricciardelli
Keyword(s):  
Sex Offenders ◽  
New Brunswick ◽  
Prince Edward Island ◽  
Prison Population ◽  
Correctional Officers ◽  
Occupational Culture ◽  
Structured Interviews ◽  
Men And Women ◽  
Hermeneutic Approach

In this article, we analyze the politics of emotions within the occupational culture of correctional officers by focusing attention on how sex offenders are constituted as objects of fear and disgust. We draw on in-depth semi-structured interviews with 100 Canadian men and women with experience working as correctional officers in provincial prisons (e.g. New Brunswick, Ontario, Alberta, Nunavut, Prince Edward Island) to understand how sex offenders are viewed within their occupational culture. Utilizing an interpretive hermeneutic approach, this article analyzes Canadian correctional officers’ interpretations of sex offenders. We show the effects of sex offenders’ construction as objects of fear and disgust, in terms of their identities and positionality in the general prison population, and the level of protection and services they receive while in prison.

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