Effects of fertilizers, mulches and land contours on the growth of sea buckthorn cultivars in organic farming

The effects of different organic cultivation methods on the growth of two Finnish sea buckthorn was studied for two years

Rikkakasvien siementen määrä ja elinvoima eräillä MTTK:n kiertokoealueilla : Kirjallisuustutkimus ja MTTK:n kolmen tutkimusaseman näytteiden analyysi

VokKirjasto Aj-

Study on morphological characteristics of the ladybird beetles (Coleoptera: Coccinellidae) and their host-plants posibility in Joensuu, Finland

The survey of the ladybird beetles population was conducted in Joensuu area, Finland, over a period of three years from mid- May 2010 to mid-August 2013. All the specimens of the coccinellid ladybird beetles were collected from five major localities: City centre, Linnunlahti, Karsikko, Utra and Pilkko areas. In the family Coccinellidae, 16 species belonging to 10 genera were found in our experiment time. Most of ladybird’s common host–plant was Rosa rugosa and also other different species of plants. All the host-plants were growing naturally in the local ecosystem of the experimental area. Out of the 16 species of ladybird beetles from Joensuu, there were two species (Cryptolaemus montrouzieri and Chilocorus stigma) reported for the first time from North Karelia and is therefore, a new addition to the ladybird beetles fauna of Finland

Polyphenol oxidase (PPO, catecholase) activity during germination and early seedling growth of Cicer milkvetch (Astragalus cicer L.)

Mature seeds of the legume Astragalus cicer L. form a homogeneous seed pool in size and weight. They occur either brown coloured or yellow coloured. They reveal an expressed dormancy but they germinate readily after mechanical scarification. Time span of germination and early seedling development under defined conditions were followed and compared to the activity and potential activation of polyphenol oxidase (PPO, catecholase). The yellow seeds developed without difficulties, but on the brown coloured seeds in the course of germination hyphal growth was visible which was linked with the death of the seedlings. Quantitative experiments with the yellow seeds revealed that scarified seeds formed more than 98 % of seedlings within seven days. There was no difference of germination rate between dark and daylight incubations. The polyphenol oxidase of the seeds occurs in two forms, a preformed testa localized enzyme and an induced PPO activity of the seedling. The initially high activity of the testa related PPO (1.32 μM O2/h x g fresh weight) decreases during the first days after germination, the activity of the seedling related PPO becomes detectable four to five days after onset of germination. After seven days the activity in roots is about 3.6 μM O2/h x g fresh weight. The cotyledons reveal 2.3 and the hypocotyl 1.9 μM O2/h x g fresh weight, respectively.There is an indication that autoinhibitory components interfere with the germination process. The importance of the polyphenol oxidase as a component of the plants’ protection system during germination is discussed

Kylvöajan vaikutus lupiinin (Lupinus angustifolius L.) siemensatoon Keski- ja Pohjois-Suomessa

VokLoppuunmyyt

Nurmikasvilajien vertailu Pohjois-Kainuussa

vKirjasto Aj-

Phenological study on the trees, bushes and arable peat land

VokKirjasto Aj-

Lupiinin siementuotanto Keski- ja Pohjois-Suomessa

VokLoppuunmyyt

Planar Jet Stripping of Liquid Coatings: Numerical Studies

In this paper, we present a detailed example of numerical study of flm formation in the context of metal coating. Subsequently we simulate wiping of the film by a planar jet. The simulations have been performed using Basilisk, a grid-adapting, strongly optimized code. Mesh adaptation allows for arbitrary precision in relevant regions such as the contact line or the liquid-air impact zone, while coarse grid is applied elsewhere. This, as the results indicate, is the only realistic approach for a numerical method to cover the wide range of necessary scales from the predicted film thickness (tens of microns) to the domain size (meters). The results suggest assumptions of laminar flow inside the film are not justified for heavy coats (liquid zinc). As for the wiping, our simulations supply a great amount of instantaneous results concerning initial film atomization as well as film thickness.Comment: 20 pages, 20 figure