Papers in Press

Papers in the press are accepted peer-reviewed papers published online in manuscript form, but which have not been copyedited and not yet appeared in a regular issue of the journal. Copyediting may lead to small differences between the papers in press version and the final version, therefore please note that titles and content are liable to change during preparation for publication.


Malle Järvan
REVIEW: THE OVERVIEW OF THE RESEARCH ON THE SULPHUR APPLICATION TO WINTER WHEAT IN ESTONIA
In Press
Abstract
REVIEW: THE OVERVIEW OF THE RESEARCH ON THE SULPHUR APPLICATION TO WINTER WHEAT IN ESTONIA
Malle Järvan
Estonian Crop Research Institute, Department of Agrotechnology, Teaduse 4/6, 75501 Saku, Estonia
Due to several objective reasons, the sulphur (S) deficiency in agricultural crops in Europe came to the fore in the last decades before the turn of the century. This work gives an overview of the Estonian long-year research concerning winter wheat responses on the S fertilization. This study presents a versatile influence of S application – beginning with the influence on the yield formation, grain yield quantity and quality, followed by the one on the biological quality of wheat proteins, and on the bread-making properties of flour and dough, and ending with the one on the quality indices of baked breads. Field experiments were conducted at two locations on calcaric Cambisol and Podzoluvisol. On the background of N100 or 120 kg ha-1, S was given as granular NS-fertilizers or foliar applied with Sulfur F3000 or with fungicide Thiovit Jet. Flour and dough properties for bread-making were determined by using a farinograph Brabender. The baking tests were carried out in laboratory conditions. The influence of S on the grain yield and quality, and bread-making properties of wheat depended on the year and location. As the average of experiments, the S application significantly increased the grain yield (r = 0.960). The increasing yields were accompanied by decreasing contents of protein and wet gluten. However, due to S application the biological quality of proteins was increasing, because the contents of some essential amino acids were increasing. The significant positive (r = 0.938) effect of the S application on the Gluten index was revealed, which is a good predictor for the baking quality of wheat flour. In addition, some significant positive effects of the S application on the rheological properties of dough and quality indices of baked breads were demonstrated. Thus, the S addition by nitrogen fertilization in parallel with increasing yields improved several bread-making parameters of wheat flour.
Keywords: yield components, grain yield, content and biological quality of protein, Gluten index, bread-making properties of wheat flour and dough, quality of baked bread.
Source: Agraarteadus, 2019, 30(1):In Press
doi: https://dx.doi.org/10.15159/jas.19.03

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Järvan, M. 2019. Ülevaade: Ülevaade väävli kui talinisule olulise toiteelemendi mõju uuringutest Eestis. Agraarteadus, 30(1):Avaldamisel. doi: 10.15159/jas.19.03
Järvan, M.
2019. Review: The overview of the research on the sulphur application to winter wheat in Estonia. Agraarteadus, 30(1):In Press. doi: 10.15159/jas.19.03 (In Estonian)
AUTHOR CONTACT
Estonian Crop Research Institute, Department of Agrotechnology, Teaduse 4/6, 75501 Saku, Estonia
Highlights: 
  • Sulphur applied simultaneously with nitrogen increased the productive sprouting, number of grains per ear, and the grain yield of winter wheat.
  • The effect of sulphur application depended on weather and soil conditions.
  • Sulphur deficiency could be alleviated also by foliar application using several S-containing substances.
  • The sulphur application improved biological quality of wet gluten and some technological parameters of dough, and guaranteed high bread-making quality of winter wheat.

Raimo Kõlli, Tõnis Tõnutare
REVIEW: ESTONIAN YEAR 2019 SOIL IS FEN SOIL
In Press
Abstract
REVIEW: ESTONIAN YEAR 2019 SOIL IS FEN SOIL
Raimo Kõlli, Tõnis Tõnutare
Estonian University of Life Sciences, Institute of Agricultural and Environmental Sciences, Chair of Soil Science, Fr. R. Kreutzwaldi 5, 51006 Tartu, Estonia
By the Estonian Soil Sciences Society for the Year 2014 Soils the Leached soils, for 2015 – Limestone rendzinas, for 2016 – Bog soils, for 2017 – Typical podzols, for 2018 – Pseudopodzolic soils, and for 2019 – Fen soils (M) were elected. As the Year Soil of 2019 was not previously introduced in the Journal of Agricultural Science, in the actual overview was necessary to treat their classification, ecological conditions of their forming and functioning, hydro-physical and ecological properties, association of them with other soil species, distribution and conversion their names into WRB system. In the review, the main morphological properties of fen soils and the principles of their dividing into soil species (identified by soil genesis) and varieties (divided on basis of peat decomposition stage) are treated. Besides that, the fen soils' productivity, peculiarities of their paludification processes, distribution in Estonia and the data about their chemical properties are presented. In the overview, as well, the estimations of organic carbon stocks and assessments of annual organic carbon fluxes in peaty soil cover are presented and discussed. In the final part, the problems connected with environmentally sustainable use in agriculture and forestry and protection of fen soils are treated.
Keywords: year soil, classification of fen soils, fen soils, Eutric Histosol, composite soil matrix, peat soil cover, soil species, soil variety, annual cycling of carbon, drained peatland.
Source: Agraarteadus, 2019, 30(1):In Press
doi: https://dx.doi.org/10.15159/jas.19.05

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Kõlli, R., Tõnutare, T. 2019. Ülevaade: Eesti aastamuld 2019 on madalsoomuld. Agraarteadus, 30(1):Avaldamisel. doi: 10.15159/jas.19.05
Kõlli, R., Tõnutare, T.
2019. Review: Estonian year 2019 soil is fen soil. Agraarteadus, 30(1):In Press. doi: 10.15159/jas.19.05 (In Estonian)
AUTHOR CONTACT
Estonian University of Life Sciences, Institute of Agricultural and Environmental Sciences, Chair of Soil Science, Fr. R. Kreutzwaldi 5, 51006 Tartu, Estonia
Highlights: 
  • For the year 2019 soil of Estonia the fen soil was elected.
  • For the year 2019 soil of Estonia the fen soil was elected.
  • The fen soils form approximately 14% from whole Estonian soil cover and 59% from its peat soil cover.
  • By WRB the generalized name of fen soils is Hemic/Sapric Eutric Histosols.
  • For marking of fen soils on soil maps the code ‘M’ is in use.
  • The dominating variety among fen soils is ‘Deep well-decomposed fen soil’.
  • As result of artificial drainage the forest stand quality class improves by 2 classes.

Margit Olle
SHORT COMMUNICATION: THE IMPROVEMENT OF THE QUALITY, AND NUTRIENT CONTENT OF LEAF CELERY TRANSPLANTS BY EFFECTIVE MICROORGANISMS
In Press
Abstract
SHORT COMMUNICATION: THE IMPROVEMENT OF THE QUALITY, AND NUTRIENT CONTENT OF LEAF CELERY TRANSPLANTS BY EFFECTIVE MICROORGANISMS
Margit Olle
Estonian Crop Research Institute, J. Aamissepa 1, Jõgeva alevik, 48309, Estonia
Effective microorganisms (EM) comprise a mixture of live natural cultures of microorganisms isolated from fertile soils that are used to improve crop production. The purpose was to assess the influence of EM on the growth and nutrient content of leaf celery transplants. Two treatments were compared: 1) EM treatment comprised of seed soaking in EM 1:500 solution, sowing in EM treated peat and watering the plants weekly with EM solution. 2) Control treatment included similar treatments with water. Leaf celery transplants grown with EM were significantly shorter and had thicker stems than those grown without EM. The contents of nitrogen, phosphorus, potassium and calcium increased in transplants grown with EM compared to those grown without EM. The contents of nitrates and magnesium did not show statistically significant differences. Conclusion: EM improves the growth and increases nitrogen, phosphorus, potassium and calcium contents of leaf celery transplants.
Keywords: effective microorganisms, height, leaf celery, nutrients, stem diameter, transplants.
Source: Agraarteadus, 2019, 30(1):In Press
doi: https://dx.doi.org/10.15159/jas.19.01

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Olle, M. 2019. The improvement of the quality and nutrient content of leaf celery transplants by effective microorganism. Agraarteadus, 30(1):In Press. doi: 10.15159/jas.19.01
AUTHOR CONTACT
Estonian Crop Research Institute, J. Aamissepa 1, Jõgeva alevik, 48309, Estonia
Highlights: 
  • Effective microorganisms (EM) improves the growth and increases nitrogen, phosphorus, potassium and calcium contents of leaf celery transplants.
  • Leaf celery transplants grown with EM were significantly shorter and had thicker stems than those grown without EM.
  • The contents of nitrogen, phosphorus, potassium and calcium increased in transplants grown with EM compared to those grown without EM.

Margit Olle
SHORT COMMUNICATION: THE INFLUENCE OF VERMICOMPOST BASED SUBSTRATES ON BASIL GROWTH AND NUTRIENT CONTENT
In Press
Abstract
SHORT COMMUNICATION: THE INFLUENCE OF VERMICOMPOST BASED SUBSTRATES ON BASIL GROWTH AND NUTRIENT CONTENT
Margit Olle
Estonian Crop Research Institute, J. Aamissepa 1, Jõgeva alevik, 48309, Estonia
Vermicompost produced by earthworms is rich in macro- and micronutrients, vitamins and growth hormones, which are all needed for successful plant growth. The influence of vermicompost based growth substrates on basil (Ocimum basilicum L.) growth and nutrient content was assessed. Treatments were: 1. 30% vermicompost, peat, sand, dolomite stone; 2. 25% vermicompost, peat, gravel, perlite; 3. 25% vermicompost, peat, gravel, light gravel, 4. commercially available growth medium, or 5. 20% vermicompost and organic matter rich clay soil. Basil growth was best with treatments 1 and 2. Nutrient content of basil was best in treatment 3. The best growth substrate for basil production is treatment 1, based on growth results, while based on nutrient analysis when basil is used in medicine, the right treatment is 3: 25% vermicompost, peat, gravel, light gravel.
Source: Agraarteadus, 2019, 30(1):In Press
doi: https://dx.doi.org/10.15159/jas.19.02

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Olle, M. 2019. The influence of vermicompost based substrates on basil growth and nutrient content. Agraarteadus, 30(1):In Press. doi: 10.15159/jas.19.02
AUTHOR CONTACT
Estonian Crop Research Institute, J. Aamissepa 1, Jõgeva alevik, 48309, Estonia
Highlights: 
  • The best substrates to grow basil were 1 (30% vermicompost, peat, sand, dolomite stone) and 3 (25% vermicompost, peat, gravel, light gravel).

Jüri Olt, Risto Ilves, Arne Küüt
REVIEW: TRENDS IN THE PARK OF AGRICULTURAL MACHINERY IN ESTONIA IN THE PERIOD 2010–2018
In Press
Abstract
REVIEW: TRENDS IN THE PARK OF AGRICULTURAL MACHINERY IN ESTONIA IN THE PERIOD 2010–2018
Jüri Olt, Risto Ilves, Arne Küüt
Estonian University of Life Sciences, Institute of Technology, Chair of Biosystems Engineering, Fr. R. Kreutzwaldi 56, 51006 Tartu, Estonia
The aim of the current research is to provide an overview of the trends in the park of agricultural machinery in Estonia during the period 2010–2018. For this purpose, data obtained from the registers of Agriculture and Transport of Statistics Estonia have been used. The article outlines, firstly, changes in the number of agricultural holdings by the size of arable land and growing area of grain, secondly, changes in the number of tractors and grain harvesters, including the number of new tractors and harvesters sold over the years, thirdly, the preferences of holdings for tractors and grain harvesters, and fourthly, the categorization of new tractors and grain harvesters by the manufacturing company in the given time period. What is more, developments concomitant with trends in the park of agricultural machinery have been described.
Source: Agraarteadus, 2019, 30(1):In Press
doi: https://dx.doi.org/10.15159/jas.19.04

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Olt, J., Ilves, R., Küüt, A. 2019. Ülevaade: Põllumajandusliku masinapargi arengud Eestis ajavahemikul 2010–2018. Agraarteadus, 30(1):Avaldamisel. doi: 10.15159/jas.19.04
Olt, J., Ilves, R., Küüt, A.
2019. Review: Trends in the park of agricultural machinery in Estonia in the period 2010–2018. Agraarteadus, 30(1):In Press. doi: 10.15159/jas.19.04 (In Estonian)
AUTHOR CONTACT
Estonian University of Life Sciences, Institute of Technology, Chair of Biosystems Engineering, Fr. R. Kreutzwaldi 56, 51006 Tartu, Estonia
Highlights: 
  • The increasing of growing areas of agricultural crops in the period have formed a more efficient park of tractors and grain harvesters.
  • The average gross number and engine power of tractors have increased.
  • The average engine power, width of headers and gross number of grain harvesters have increased.
  • Trends of agricultural machinery park at the period are analogous to the changes of the trends in the West European agricultural machinery park.

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