RESPONSE OF REED CANARYGRASS ON SEDGE–ORGANIC SOIL TO FERTILITY LEVELS AND TEMPERATURE IN THE GROWTH ROOM

1967 ◽  
Vol 47 (3) ◽  
pp. 305-310 ◽  
Author(s):  
W. L. Pringle ◽  
A. L. van Ryswyk
Keyword(s):  
British Columbia ◽  
Soil Temperature ◽  
Organic Soil ◽  
Average Yield ◽  
Reed Canarygrass ◽  
Peat Soils ◽  
The Third ◽  
Growth Room ◽  
Optimum Productivity ◽  
Lower Temperature

Reed canarygrass grown in a growth room showed marked response to N, P and K on two out of three sedge peat soils of central British Columbia. On the third soil, there was little response to P but marked response to K and N. Reducing the soil temperature from 21.1° to 12.8 °C reduced the average yield 10%; dropping it from 12.8° to 4.4 °C reduced yield a further 15%. P was particularly limiting at the lower temperature. K seemed to be required for vigor and persistence of reed canarygrass. It was concluded that it is necessary to have heavy applications of the proper combination of nutrients for each individual soil, for optimum productivity.

RESPONSE OF WATER SEDGE IN THE GROWTH ROOM TO FERTILIZER AND TEMPERATURE TREATMENTS

1965 ◽  
Vol 45 (1) ◽  
pp. 60-66 ◽  
Author(s):  
W. L. Pringle ◽  
A. L. van Ryswyk
Keyword(s):  
British Columbia ◽  
Soil Nutrients ◽  
Field Conditions ◽  
Average Yield ◽  
Root Temperature ◽  
Growth Room ◽  
Simulated Field ◽  
Lower Temperature ◽  
Main Component ◽  
Complete Fertilizer

Water sedge (Carex aquatalis Wahl.), the main component of wet bogs, used for hay in central British Columbia responds under growth-room conditions to a complete fertilizer. Potted sedge-sod plugs were grown for five consecutive cuts (242 days) at temperatures of 70° and 40°F and at light intensities less than 1000 ft-c. Reducing the root temperature from 70° to 40°F, which simulated field conditions, lowered the average yield of all treatments by 45%. Phosphorus appeared to be the most limiting element at both temperatures. Nitrogen gave significant increases only at the lower temperature. The addition of soil nutrients more than doubled the recovery of the same nutrients in the forage from plants grown at both 40° and 70°F as compared with controls. On forage not supplied with P, the Ca/P ratio exceeded 3.

SOIL INSECTICIDES FOR CONTROL OF ROOT WEEVILS IN STRAWBERRIES IN BRITISH COLUMBIA

1959 ◽  
Vol 39 (1) ◽  
pp. 86-91 ◽  
Author(s):  
W. T. Cram ◽  
H. Andison
Keyword(s):  
British Columbia ◽  
Mineral Soil ◽  
Vancouver Island ◽  
Average Yield ◽  
Soil Application ◽  
The Third ◽  
Root Weevils ◽  
Black Vine Weevil ◽  
Soil Insecticides

On a light, gravelly, high-mineral soil in southern Vancouver Island, each of the following treatments gave satisfactory protection from the black vine weevil, Brachyrhinus sulcatus (F.), and the strawberry root weevil, B. ovatus (L.), for the [Formula: see text] life of the strawberry planting: a pre-planting soil application of aldrin at 5 lb., dieldrin at 3 lb., or chlordane at 10 lb. toxicant per acre as a dust, in combination with an application to the transplant roots at 5 lb. of [Formula: see text], [Formula: see text], or 5 per cent dust respectively per 10,000 plants. Three foliage applications, each made at 30 lb. of the appropriate dust per acre during the first 2 years, were not necessary to give protection against the larvae when the soil and roots were treated. The numbers of B. sulcatus larvae per plant and the yields in tons per acre from the treated plots in the third crop year averaged 0 and 2.8, in comparison with 11.6 and 1.1 from the untreated plots. In the latter, many of the plants were killed by B. sulcatus larvae. Applications of [Formula: see text] aldrin dust to the soil, roots, and foliage, to the soil and roots, and to the soil alone gave an average yield per acre in the third year of 1.9 tons in comparison with 1.1 tons when applied to the roots alone or.02 tons from untreated plots. The treatments were not effective against the obscure strawberry root weevil, Sciopithes obscurus Horn, and weevils of the genus Nemocestes [mainly N. incomptus (Horn)].

scholarly journals Nitrous Oxide Emissions in Pineapple Cultivation on a Tropical Peat Soil

2021 ◽  
Vol 13 (9) ◽  
pp. 4928
Author(s):  
Alicia Vanessa Jeffary ◽  
Osumanu Haruna Ahmed ◽  
Roland Kueh Jui Heng ◽  
Liza Nuriati Lim Kim Choo ◽  
Latifah Omar ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Soil Temperature ◽  
Peat Soil ◽  
Farming Systems ◽  
N2o Emission ◽  
Nitrous Oxide Emissions ◽  
Natural State ◽  
N2o Emissions ◽  
Wet Season ◽  
Peat Soils

Farming systems on peat soils are novel, considering the complexities of these organic soil. Since peat soils effectively capture greenhouse gases in their natural state, cultivating peat soils with annual or perennial crops such as pineapples necessitates the monitoring of nitrous oxide (N2O) emissions, especially from cultivated peat lands, due to a lack of data on N2O emissions. An on-farm experiment was carried out to determine the movement of N2O in pineapple production on peat soil. Additionally, the experiment was carried out to determine if the peat soil temperature and the N2O emissions were related. The chamber method was used to capture the N2O fluxes daily (for dry and wet seasons) after which gas chromatography was used to determine N2O followed by expressing the emission of this gas in t ha−1 yr−1. The movement of N2O horizontally (832 t N2O ha−1 yr−1) during the dry period was higher than in the wet period (599 t N2O ha−1 yr−1) because of C and N substrate in the peat soil, in addition to the fertilizer used in fertilizing the pineapple plants. The vertical movement of N2O (44 t N2O ha−1 yr−1) was higher in the dry season relative to N2O emission (38 t N2O ha−1 yr−1) during the wet season because of nitrification and denitrification of N fertilizer. The peat soil temperature did not affect the direction (horizontal and vertical) of the N2O emission, suggesting that these factors are not related. Therefore, it can be concluded that N2O movement in peat soils under pineapple cultivation on peat lands occurs horizontally and vertically, regardless of season, and there is a need to ensure minimum tilling of the cultivated peat soils to prevent them from being an N2O source instead of an N2O sink.

Microstructure Development in Copper Welded by the FSW-Process

2003 ◽  
Vol 807 ◽  
Author(s):  
Therese Källgren ◽  
Rolf Sandström
Keyword(s):  
Welding Process ◽  
Mechanical Deformation ◽  
Microstructure Development ◽  
Friction Stir ◽  
Friction Heat ◽  
The Third ◽  
Lower Temperature ◽  
Weld Root ◽  
Nuclear Fuel Waste ◽  
Joining Process

ABSTRACTTo ensure safe storage of nuclear fuel waste, copper canisters are proposed as corrosion barrier. One alternative for sealing the copper canisters is Friction Stir Welding (FSW). During the joining process friction heat and mechanical deformation appear between the rotating tool and the material being welded. Liquid metal will not form, since this is a solid state welding process. Three distinct microstructural zones are developed namely the nugget, the thermo-mechanically affected zone (TMAZ) and heat-affected zone (HAZ). The nugget is in the centre of the weld, where the pin is located and where severe plastic deformation occurs that leads to recrystallisation. Surrounding the nugget, the TMAZ is only partially recrystallised, due to lower temperature increase and deformation compared to the nugget. The third zone, HAZ, surrounds the TMAZ. The initial nugget can have a classic round aluminium nugget image, when the welding conditions are cold, but the steady state nugget, is wider near the shoulder and shorter in the weld root.

scholarly journals Cautious Optimism: Fraser v Canada (Attorney General)

2021 ◽  
Vol 30 (2) ◽  
pp. 1-14
Author(s):  
Jonnette Watson Hamilton
Keyword(s):  
British Columbia ◽  
Health Services ◽  
Adverse Effects ◽  
Negative Impact ◽  
Attorney General ◽  
The Other ◽  
Adverse Impact ◽  
Canadian Charter ◽  
The Third ◽  
Direct Discrimination

Adverse effects discrimination arises when a law that appears to be neutral on its face has a disproportionate and negative impact on members of a group identified by a protected ground.1 The discrimination is usually not as easy to see as it is in cases of direct discrimination, where distinctions are drawn by a law, program, or policy. This may be why Fraser v Canada (Attorney General)2 is only the third adverse effects claim under section 15(1) of the Canadian Charter of Rights and Freedoms3 to succeed since section 15 came into force in 1985.4 Fraser is notable simply because it is the first successful adverse effects claim in twenty-two years.5 1 Jonnette Watson Hamilton & Jennifer Koshan. “Adverse Impact: The Supreme Court’s Approach to Adverse Effects Discrimination under Section 15 of the Charter” (2015) 19:2 Rev Const Stud Studies 191 at 196 [“Adverse Impact”]. 2 2020 SCC 28 [Fraser]. 3 Part I of the Constitution Act, 1982, being Schedule B to the Canada Act 1982 (UK), 1982, c 11 [Charter]. 4 The other two cases in which adverse effects claims were successful were Eldridge v British Columbia, [1997] 3 SCR 624, 151 DLR (4th) 577 [Eldridge cited to SCR] and Vriend v Alberta, [1998] 1 SCR 493, 156 DLR (4th) 385 [Vriend cited to SCR]. 5 At least five adverse effects claims made under section 15 of the Charter failed in the intervening twentytwo years: Health Services and Support — Facilities Subsector Bargaining Assn v British Columbia, 2007 SCC

scholarly journals FEATURES OF BRASSICA RAPA'S GROWTH AND DEVELOPMENT, DEPENDING ON THE TERRITORY OF SOWING THE SEED

2019 ◽  
pp. 183-194
Author(s):  
Serhii Vdovenko
Keyword(s):  
Seed Germination ◽  
Soil Temperature ◽  
Growth And Development ◽  
Total Yield ◽  
Growing Season ◽  
Vegetation Period ◽  
Row Spacing ◽  
The Third ◽  
Golden Ball ◽  
And Control

In order to study the effect of the time of sowing seeds on the passage of morphogenesis and productivity of rapeseed, the scheme included experiments where the seeds were sown in I, II, III in April, I and II in May. The experiment used varieties of Golden Ball, Purpurleopop, Purpurov and Geisha, and control was the variant in which the seeds of the Golden Ball varieties were sown in the second decade of April with a row spacing of 45 cm. laboratory - to determine the total yield; statistical - to establish the reliability of the investigated factors. Seed germination analysis used in the experiment ranged from 78.9% to 81.1% on average. The highest indicator of seed germination was characterized by the Purpulepop variety, where the studied value was 83.2%, which was dominated by the seed germination of the control variant by 2.1%. In the early stages of sowing seeds, the period of seedling formation was shorter. Seeding of seeds in the first two decades of April on the surface of the soil was observed for 8 days. The short sprouting period was characterized by all varieties of turnips. As a result of sowing turnip seeds at a later date, namely in the third decade of April - the first and second decade of May and the setting of a higher soil temperature, the period of germination was extended and ranged from 8 to 10 days. By using the term of sowing seeds I-II decade of April, the short interphase period was characterized by Purpleupop and Purpurova varieties, where the specified period was only 22 days. The sowing of turnip seeds at a later date ensured the formation of an interphase period of "seedlings - leaf rosette" in 23-25 days except Purpulopop variety. The interphase period "leaf rosette - the beginning of rooting" and "the beginning of rooting - technical maturity" determined the benefits of early seeding, namely in the first decade of April on varieties Purpulopop and Purpurov.The short vegetation period was characterized by the Golden Ball plants for sowing seeds in the first and third decades of April and the first of May. During the specified seeding period the duration of the growing season was only 40 days. A longer vegetation period was characterized by plants of the Geisha variety for sowing seeds in the first two decades of April. As a result of the use of the researched elements of technology to grow turnips in open soil, the total yield varied from 11.0 t / ha to 24.0 t / ha. The most productive is the first sowing of rapeseed, where its value ranged from 20.6 t / ha to 22.7 t / ha. At the same time, when sowing seeds in the first decade of April, the yield of turnip varieties Purpulepop was the highest and was 22.7 t / ha, or the increase was 2.4 t / ha.

scholarly journals The Changing Regulatory Scheme in Northeast British Columbia

2011 ◽  
Vol 49 (2) ◽  
pp. 369 ◽  
Author(s):  
Wally Braul
Keyword(s):  
British Columbia ◽  
Land Tenure ◽  
Oil And Gas ◽  
Contaminated Sites ◽  
Public Concern ◽  
Consultation Process ◽  
New Era ◽  
The Third ◽  
Regulatory Changes ◽  
Exploration And Production

The Northeast British Columbia (NEBC) oil patch is undergoing a boom in land tenure sales, exploration, and production. This comes at a time of increasing public concern over the use of hydraulic fracturing (or “fracking”), an unconventional technology that ushered in a new era of production in NEBC, along with several new contentious issues. Recently, four significant regulatory changes have been enacted or planned for the immediate future. The first, likely in response to public concern over fracking, occurred in October 2010 with an overhaul of the decades-old Petroleum and Natural Gas Act and the coming into force of the bulk of the provisions in the Oil and Gas Activities Act. The changes primarily affect production and environmental management, and several new provisions have a direct impact on fracking. The second change under development is the creation of a long-awaited groundwater licencing regime, marking a stronger environmental presence in the NEBC, and possibly abrogating pre-existing extraction rights. The third change arises from the expiry of Crown-First Nation Consultation Process Agreements (CPAs). Recent jurisprudence continues to point to the need for improved consultation and accommodation, but current negotiations may or may not succeed in arriving at a more comprehensive successor to the expired CPAs. Finally, under British Columbia’s contaminated sites regime, new measures expand the liability exposure of oil patch operators for contaminated sites in both civil actions and government enforcement proceedings.

scholarly journals Calli induction in leaf explants of coffee elite genotypes

2011 ◽  
Vol 41 (3) ◽  
pp. 384-389 ◽  
Author(s):  
Juliana Costa de Rezende ◽  
Carlos Henrique Siqueira de Carvalho ◽  
Moacir Pasqual ◽  
Ana Carolina Ramia Santos ◽  
Stephan Malfitano de Carvalho
Keyword(s):  
Coffea Arabica ◽  
Block Design ◽  
Leaf Explants ◽  
Production Potential ◽  
Embryogenic Calli ◽  
The Third ◽  
Randomized Block Design ◽  
Indirect Somatic Embryogenesis ◽  
Growth Room ◽  
Opposite Behavior

Three experiments were carried out with the objective of achieving high effectiveness in calli induction from high heterozygosis leaf explants of Coffea arabica through indirect somatic embryogenesis. A randomized-block design in a 2x5 factorial arrangement made up of two media [BOXTEL & BERTHOULY (1996) and TEIXEIRA et al. (2004)] and five C. arabica genotypes were used in the first experiment. In the second experiment the embryogenic calli production potential was evaluated in ten genotypes. Each of them was considered as a treatment. In the third experiment the variations in both 2.4-D (2.5 e 20µM) and 2-iP (2.5 e 20µM) concentrations in TEIXEIRA et al. (2004) medium and secondary media were evaluated. Crops were kept in a growth room under darkness, at 25±2oC. The medium described by TEIXEIRA et al (2004) was found to be superior when compared to that described by BOXTEL & BERTHOULY (1996) in the 2.2 and 7.2 genotypes. An opposite behavior was noticed in 4.2 genotype, that is, BOXTEL & BERTHOULY (1996) had medium superiority. Both 3.0 and 5.0 genotypes had the same behavior in both media studied, which shows that the somatic embryo production depends on the genotype. Calli induction depends on the 2-iP and 2.4 D ratio. The 20.0µM of 2.4-D and 20.0µM of 2-iP combination caused the highest embryogenic calli induction rate.

scholarly journals The efficiency of different moisture and nutrition conditions in early potato growing under drip irrigation in southern Ukraine

2021 ◽  
Vol 66 (1) ◽  
pp. 1-16
Author(s):  
Raisa Vozhehova ◽  
Galina Balashova ◽  
Liubov Boiarkina ◽  
Olesya Yuzyuk ◽  
Sergey Yuzyuk ◽  
...  
Keyword(s):  
Drip Irrigation ◽  
Field Research ◽  
Early Potato ◽  
Average Yield ◽  
Irrigation Rate ◽  
The Third ◽  
Additional Control ◽  
Moisture Conditions ◽  
Tuber Treatment ◽  
Southern Ukraine

The article presents field research results on the effectiveness of different moisture and nutrition conditions at the cultivation of early potato under drip irrigation in southern Ukraine. The scheme of the experiment included the treatment with the complex Mochevyn K as an additional control and different methods and correlation of fertilizers Plantafol (treatment of tubers before planting, fertilizing, at budding and their combination), as well as different soil moisture conditions (irrigation rates of 100 and 200 m?/ha). Studies have shown that the average yield of early potato without irrigation was 10.44 t/ha. Moisture conditions significantly affected the yield of young tubers - irrigation at a rate of 200 m?/ha provided 21.61 t/ha, whereas reducing the irrigation rate to 100 m?/ha led to a decrease in yield - 19.86 t/ha. The first treatment of planting tubers, treatment of plants at sprouting and during budding provided almost the same yield. The second and the third treatments of plants and tubers did not lead to a significant increase in yield. The highest productivity of potato was provided by Plantafol treatment of tubers and combination of tuber treatment with foliar feeding at mass sprouting phase with a 200 m?/ha irrigation rate for two years: 24.16 and 23.22 t/ha.

Parasitism and phenology of Dasineura mali (Diptera: Cecidomyiidae) in Canadian apple (Rosaceae) orchards

2020 ◽  
Vol 152 (3) ◽  
pp. 355-373
Author(s):  
J.E. Cossentine ◽  
A.M. Brauner ◽  
J.L. Franklin ◽  
M.C. Robertson ◽  
P.N. Buhl ◽  
...  
Keyword(s):  
British Columbia ◽  
Nova Scotia ◽  
Molecular Analysis ◽  
Malus Domestica ◽  
Pheromone Trap ◽  
The Third ◽  
Alien Pest ◽  
First Time ◽  
Fraser Valley ◽  
Dasineura Mali

AbstractThe apple leaf midge, Dasineura mali (Kieffer) (Diptera: Cecidomyiidae), an invasive alien pest established for many years in Nova Scotia, Canada, has invaded Ontario and British Columbia, Canada apple (Malus domestica Borkhausen; Rosaceae) orchards, damaging growing tips of trees. Molecular analysis indicated that Nova Scotia populations are genetically different from Ontario and British Columbia populations. Pheromone trap captures, oviposition on growing apple terminals, and the incidence of third instars indicate three D. mali generations in each province. Platygaster demades Walker (Hymenoptera: Platygastridae), released in Nova Scotia in 1993, parasitised 34% of the third midge generation in that province and was reared from D. mali for the first time in 2016 in the Fraser Valley of British Columbia. Lyrcus nigroaeneus Ashmead (Hymenoptera: Pteromalidae) parasitised up to 21% of D. mali in southwestern Ontario. Synopeas myles (Walker) (Hymenoptera: Platygastridae) was recorded from D. mali for the first time, one specimen in each of Nova Scotia and Ontario, and was the most important parasitoid in British Columbia. Synopeas myles parasitism in Okanagan and Similkameen, British Columbia orchards increased from 0% to a mean of 30% of D. mali larvae from 2014 to 2016. Other minor parasitoids included Platygaster tuberosula Kieffer (Hymenoptera: Platygasteridae) in all three provinces and Aphanogmus vicinus Förster (Hymenoptera: Ceraphronidae) in British Columbia.

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