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[Profitability of organic cereal production in Estonia]
2002
Vasil'ev, N. | Ehllermae, O. (Estonian Agricultural Univ., Tartu (Estonia))
The importance of organic farming has increased rapidly in Estonia in the last few years. Nevertheless the higher prices of organic products are not presented in Estonia yet, but the official subsidies are often the main reason to start organic farming. The Estonian Republic supports organic farming as a branch of environmentally sustainable agriculture. The main theme of this article was to explain - is the organic cereal production profitable for farmers.
Show more [+] Less [-]["Education for All" in the Baltic Sea Countries]
2002
Bruvere, I. (Latvia Univ. of Agriculture, Jelgava (Latvia))
The article gives an insight into the development of the programme "Education for All" and Latvia's participation in the programme within the context of the Baltic Sea sub-region. The programme "Education for All" was agreed upon in 1990 in Jomtien at the World Education Forum, which were attended by representatives from 155 countries, 33 international organizations and 125 NGO. The goals of the programme include ensuring the right to education to all and promoting accessibility to education to everybody. The Dakar Framework for Action adopted at the World Education Forum sets guidelines for the development of the programme in the years 2000-2015.
Show more [+] Less [-]Influence of seed treatment on the diversity of pathogenic fungus of flaxseed and seedlings
2002
Gruzdeviene, E. (Lithuanian Inst. of Agriculture, Upyte, Panevezys reg. (Lithuania). Upyte Research Station) | Lugauskas, A. | Repeckiene, J.
Major diseases occurring on flax crops in Lithuania are caused by Fusarium spp., Colletotrichum lini Manns et Bolley, Polyspora lini Laff. et Peth., Septoria linicola (Speg.) Gar. They can spread through seed, especially when the seed material does not meet quality standards. Microscopic fungi of other species can be found on flaxseed as well. Chemical seed treatment is one of the ways to control disease agents. When treated seed is sown, the seed treaters affect the indigenous micro-biota of the soil. The trial was carried out at the Upyte Research Station of the Lithuanian Institute of Agriculture in 1999. The tested seed treaters are registered for cereals in Lithuania. Our experimental results suggest that chemical treatment of flaxseeds is an efficient method to control seed-borne diseases. The microscopic fungi on seeds and roots of seedlings were analysed at the Institute of Botany. The data on the effect of seed treaters on the diversity of pathogenic fungi of flaxseed and seedlings, and the impact of treatment on the seedling infection are discussed in this paper.
Show more [+] Less [-]Nutritive status of soils, biodiversity and yielding ability of leys in Estonian conventional and organic farms
2002
Geherman, V. | Ellermaee, O. (Estonian Agricultural Univ., Tartu (Estonia))
The paper gives a brief overview and describes the main results of comparison research in grassland management of conventional and organic farms. The aim of this study was to assess yielding ability and biodiversity of leys depending on the nutritive status of soil. The investigation based on field experiments that were carried out in several regions of Estonia: Laeaene (West), Harju (North) and Voru (South-East) county in 2001. In the research on the productivity of grass-clover leys of the first harvest year was measured the DM yield and content, the botanical composition of the sward and the concentration of crude protein on grass. The soil pHKCL and content of organic matter were measured, also the content in soil of soluble plant nutrients P, K, Ca and Mg was estimated by AL- (ammonium acetate extraction) method. The soil profiles were described and soils were classified. The dominant soil types in farms of West-Estonia were Calcic Cambisols and in North-Estonian farms Calcic Gleysols, in South-East Haplic Podzols types prevailed.
Show more [+] Less [-][Use of mineral fertiliser for perennial ryegrass seed production]
2002
Bumane, S. (Latvia Univ. of Agriculture, Skriveri (Latvia). Research Centre Skriveri)
The goal of the present research was to study formation of the productivity of perennial ryegrass at different rates of mineral fertiliser use. Field experiments were carried out on Sod-Podzolic soils during 1999-2001. The following mineral fertiliser rates were used: N and P205 each - 0, 30, 60, 90, 120 kg ha*[-1); K20 - 0, 40, 80, 120, 160 kg ha*[-1). The productivity of DM and seeds was dependent on genetic characteristics of the particular variety, on the rates of mineral fertiliser and as well as on the meteorological conditions prevailing in each investigation year. The average DM yield, depending on the particular variety, constituted 2.21-6.07 t ha*[-1), and the average seed yields were 255-672 and 133-400 kg ha*[-1) in 1st and 2nd years of stand uses, respectively.
Show more [+] Less [-]Exercise yards and feedlots and their impact on the environment
2002
Puumala, M.(MTT Agrifood Research Finland, Vihti (Finland). Agricultural Engineering Research) | Uusi-Kaemppae, J. | Nykaenen, A. | Heinonen-Tanski, H.
Requirements concerning the welfare of production animals and the low profitability of beef cattle breeding have brought exercise yards and feedlots to Finnish farms. Depending on the use of the yard, there are different aspects that have to be taken into consideration. The structure of the yard, the surface material and the space allowance are important from the point of view of both animal welfare and environmental impact. Two exercise yards have been designed, constructed and monitored, together with two feedlot areas. Samples of runoff water, gravity water, subsoil and topsoil have been taken. Their nutrient concentrations and hygienic quality have been analysed. The behaviour of animals has been observed.
Show more [+] Less [-]Sedimentation and self-purification processes in the Nemunas floodplain
2002
Vaikasas, S. (Lithuanian Inst. of Water Management, Vilainiai, Kedainiai reg. (Lithuania))
Flooding of Nemunas floodplain preserves the natural retention capacity of pollutants in water of the main canal as well as improves farming conditions on the inundated meadows of the valley. It was established that nitrogen concentration was decreasing by 20-50 % causing self - purification process on the flooded meadows. Nitrogen retention is mostly observed in the zones of stagnant water. It depends on the velocities of flood current. Heavy metals and nutrients are absorbed by tiny clay and silt particles deposited in the meadows. By the means of mathematical modelling it was established that about 37% of suspended sediments deposited in the flood plain. During the study period (1950-1991), the soils in the valley were covered by 50-60 t ha*[-1) of deposits and were naturally fertilised with 250 t of potassium, 950 t of phosphorus, 38.000 t of calcium and 147.000 t of organic matter saturated with nitrogen. In order to increase those quantities it would be efficient to increase the water discharge and bush cover in the Delta.
Show more [+] Less [-]The effect of stage of maturity and inoculant SIL-ALL**4x4 on fermentation quality and chemical composition of meadow-foxtail and meadow-fescue silage
2002
Osmane, B. (Latvia Univ. of Agriculture, Sigulda (Latvia). Research Centre "Sigra")
The aim of the experiment reported here was to evaluate the effects of an inoculant SIL-ALL**4x4 on the fermentation quality and chemical composition of silage made from meadow-fescue and meadow-foxtail. Inoculant SIL-ALL**4x4 provided the good quality of silage in all stages of maturity. Lactic acid fermentation of inoculated silage was very extensive, especially in the stages of ear formation of meadow-fescue. The results indicated that the use of inoculant improved fermentation and silage hygienic quality.
Show more [+] Less [-]Kura clover agrobiological and nutritional characteristics
2002
Selge, A. | Keres, I. (Estonian Agricultural Univ., Tartu (Estonia))
Experiments were performed to test the agronomic potential of kura clover in the seed mixtures with diminished seeding rates. During the seeding year a very slow establishment of kura clover (sown with perennial ryegrass) was observed: kura clover gave up to 7% of the total DM yield. The kura clover plants survived winter 2000/2001 well, but the distribution in the sward was not observed in the second year. The established grass sward density was rather high in the seeding year (around 10 000 tillers per square m) in 2000. In 2001, the white clover content increased to 80% of the DM yield but at the same time the grass sward density was decreased to 2900 tillers per square m. The kura clover plants are characterised by high proportion of leaves to stem and high nutritional characteristics with protein concentrations ranging between 19 and 23% as well as the neutral detergent fibre (NDF) concentrations between 24 and 38%. The experiments showed that the strains of Rhizobium bacteria required for kura clover do not naturally occur in Estonian soils and proper inoculation of kura clover seeds before planting is critical to get well-nodulated and persistent plants.
Show more [+] Less [-]The usage of fuzzy values of environment factors for the modelling of stream pollution
2002
Purvinis, O. | Sukys, P. (Kaunas Univ. of Technology (Lithuania))
Estimating water quality of rivers, lakes and other water bodies, their contamination is being modelled according to the quantitative changes of pollution factors and their appearance conditions. Water contamination is being determined considering one or another value of contamination factors. The modelling of the impact of pollution factors on water quality becomes problematic when the values of the factors can be estimated only approximately or cannot be estimated at all. It is rather difficult to define qualitative estimation of water contamination factors in comparative terms (scanty impact, average impact, etc.) applying only quantitative mathematical methods. In this case the method of fuzzy logic may be of great help. Fuzzy logic enables us to formalise the comparisons of the ojects or phenomena under discussion as well as eliminates the contradictions between qualitative and quantitative methods. Those two methods supplement each other and can be easily applied together. The objective of the study was to estimate the possibilities of fuzzy logic application for the evaluation of stream water quality.
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