scholarly journals Transgenic miR156 switchgrass in the field: growth, recalcitrance and rust susceptibility

2017 ◽  
Vol 16 (1) ◽  
pp. 39-49 ◽  
Author(s):  
Holly L. Baxter ◽  
Mitra Mazarei ◽  
Alexandru Dumitrache ◽  
Jace M. Natzke ◽  
Miguel Rodriguez ◽  
...  
Keyword(s):  
Field Growth ◽  
Rust Susceptibility

State of the field: growth, growth, growth

2004 ◽  
Vol 1 (4) ◽  
pp. 241-242 ◽  
Author(s):  
Eoghan Casey
Keyword(s):  
Field Growth ◽  
State Of The Field

scholarly journals Improving Early Field Growth of Leyland Cypress Liners by Grading and Potting

2008 ◽  
Vol 26 (1) ◽  
pp. 35-38
Author(s):  
L. Eric Hinesley ◽  
Frank A. Blazich
Keyword(s):  
Height Growth ◽  
Stem Diameter ◽  
Stem Cuttings ◽  
Initial Size ◽  
Distinct Root ◽  
Field Growth

Abstract Stem cuttings of Leyland cypress [Callitropsis × leylandii (A. B. Jacks. & Dallim.) D. P. Little; syn. × Cupressocyparis leylandii (A. B. Jacks. & Dallim.) Dallim. & A. B. Jacks.] were rooted beginning May 2004. In February 2005, liners were sorted into four grades [1 = firm root ball, top to bottom, 2 = good root ball, but loose in the upper one-third; 3 = no distinct root ball, but with enough roots to survive when potted and grown in irrigated containers; and 4 = roots ≤ 2 cm (0.8 in) in length (discarded)]. Liners from Grades 1 and 2 were transplanted to the field April 2005. Additional liners of Grades 1, 2, and 3 were grown in 3.8-liter (1-gal) containers in a nursery during 2005, and field planted early September 2005. Height and stem diameter were recorded after 1 and 2 years. Containerizing affected stem diameter more than height. Growth during the first 2 years was proportional to initial size, indicating the benefits of grading. After 2 years, the largest plants were Grade 1 liners that went directly to the field April 2005, with no intermediate potting.

scholarly journals Economics of the Sapogenin-Bearing Yam as a Crop Plant in Puerto Rico

1969 ◽  
Vol 50 (1) ◽  
pp. 53-64
Author(s):  
F. W. Martin ◽  
E. Cabanillas ◽  
M. H. Gaskins
Keyword(s):  
Puerto Rico ◽  
Crop Plant ◽  
Field Growth ◽  
Experiment Station ◽  
Costs Of Production ◽  
The Cost

From experiments at the Federal Experiment Station, Mayagüez, data on costs in Puerto Rico, and other estimates an analysis of the costs of production and potential profits in the growing of Dioscorea were recorded and calculated. The analysis was divided into costs of producing plants, establishing a plantation, yearly maintenance, and harvest. Values and profits were calculated on the basis of species, yields, ages, and sapogenin contents. The chief suggestions to be made as a result of the study were: That initial costs would be heavy and almost prohibitive; that the greatest single expense would be the cost of staking; that profits would not be possible within less than 3 years of field growth; that profits would increase during the fourth year; that D. composila could be grown more profitably than D. floribunda; and that plantations established from tuber-pieces would be more profitable than plantations established from seed. Provided no serious pest or disease destroys the plantings, it is concluded that Dioscorea could compete favorably with certain presently existing crops in Puerto Rico.

New Oil in Old Field: Growth of North Kadi Oil Field, Cambay Basin, India: A Case

1998 ◽  
Author(s):  
U.G. Marathe ◽  
A.K. Mandal ◽  
A. Elias Ahmed
Keyword(s):  
Oil Field ◽  
Cambay Basin ◽  
Old Field ◽  
Field Growth

scholarly journals Susceptibility of Winter Wheat and Triticale to Yellow Rust Influenced by Complex Interactions between Vernalisation, Temperature, Plant Growth Stage and Pathogen Race

Agronomy ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 13 ◽  
Author(s):  
Julian Rodriguez-Algaba ◽  
Chris K. Sørensen ◽  
Rodrigo Labouriau ◽  
Annemarie F. Justesen ◽  
Mogens S. Hovmøller
Keyword(s):  
Low Temperature ◽  
Plant Growth ◽  
Winter Wheat ◽  
Growth Stage ◽  
Disease Susceptibility ◽  
Yellow Rust ◽  
Adult Plant ◽  
Rust Susceptibility ◽  
Adult Plants ◽  
Increased Susceptibility

Environmental factors influence the disease susceptibility of crop plants. In this study, we established an experimental system to investigate the effects of vernalisation, temperature and plant growth stage on the susceptibility of winter wheat and winter triticale to Puccinia striiformis, the causal agent of yellow (stripe) rust. Two temperature regimes: standard (18 °C day/12 °C night) and low (12 °C day/6 °C night), vernalised and non-vernalised seedlings, vernalised adult plants and two pathogen races were investigated. At low temperatures, vernalisation reduced the susceptibility of seedlings exposed to the ‘Warrior’ race, while this was only the case for five out of eight varieties exposed to the ‘Kranich’ race. Changing from standard to low temperature resulted in increased susceptibility of non-vernalised seedlings of seven varieties inoculated with the ‘Warrior’ race and five varieties inoculated with the ‘Kranich’ race. Increased susceptibility at low temperature was also detected for several varieties at the adult plant growth stage. Comparisons between vernalised seedlings and adult plants revealed an effect of plant growth stage on disease susceptibility (e.g., Adult Plant Resistance) in five varieties at standard temperature for the ‘Warrior’ race and in five and four varieties at standard and low temperature respectively, for the ‘Kranich’ race. The complex and unpredictable interactions between environment and pathogen influencing yellow rust susceptibility of individual varieties stress the importance of phenotyping for disease resistance under different environmental conditions and pathogen populations. The environmental impact on rust susceptibility should also be taken into account in early-warning systems targeting wheat and triticale breeding programmes and growers.

Planar velocity dynamos in a sphere

2006 ◽  
Vol 462 (2072) ◽  
pp. 2439-2456 ◽  
Author(s):  
A.A Bachtiar ◽  
D.J Ivers ◽  
R.W James
Keyword(s):  
Magnetic Field ◽  
Outer Core ◽  
Magnetic Reynolds Number ◽  
Main Magnetic Field ◽  
Dynamo Action ◽  
Field Growth ◽  
Planar Velocity ◽  
Induction Equation ◽  
Planar Flows ◽  
Magnetic Induction Equation

The Earth's main magnetic field is generally believed to be due to a self-exciting dynamo process in the Earth's fluid outer core. A variety of antidynamo theorems exist that set conditions under which a magnetic field cannot be indefinitely maintained by dynamo action against ohmic decay. One such theorem, the Planar Velocity Antidynamo Theorem , precludes field maintenance when the flow is everywhere parallel to some plane, e.g. the equatorial plane. This paper shows that the proof of the Planar Velocity Theorem fails when the flow is confined to a sphere, due to diffusive coupling at the boundary. Then, the theorem reverts to a conjecture. There is a need to either prove the conjecture, or find a functioning planar velocity dynamo. To the latter end, this paper formulates the toroidal–poloidal spectral form of the magnetic induction equation for planar flows, as a basis for a numerical investigation. We have thereby determined magnetic field growth rates associated with various planar flows in spheres. For most flows, the induced magnetic field decays with time, supporting a planar velocity antidynamo conjecture for a spherical conducting fluid. However, one flow is exceptional, indicating that magnetic field growth can occur. We also re-examine some classical kinematic dynamo models, converting the flows where possible to planar flows. For the flow of Pekeris et al . (Pekeris, C. L., Accad, Y. & Shkoller, B. 1973 Kinematic dynamos and the Earth's magnetic field. Phil. Trans. R. Soc. A 275 , 425–461), this conversion dramatically reduces the critical magnetic Reynolds number.

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