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.


Saad Enad Harfoush Aldulaimy1, Adil Khairullah Salman2, Mohammed Ali Abood3, Ghassan Jaafar Hamdi4
INFLUENCE OF MOISTURE DEPLETION AND SURFACE DRIP IRRIGATION STYLE ON SOME SOIL HYDRAULIC PROPERTIES AND POTATO CROP
In Press
Abstract
INFLUENCE OF MOISTURE DEPLETION AND SURFACE DRIP IRRIGATION STYLE ON SOME SOIL HYDRAULIC PROPERTIES AND POTATO CROP
Saad Enad Harfoush Aldulaimy1, Adil Khairullah Salman2, Mohammed Ali Abood3, Ghassan Jaafar Hamdi4

1Department of Soil Science and Water Resources, College of Agriculture, University of Anbar, Anbar, Iraq
2Institute of Geoecology, Technical University of Braunschweig, Germany
3Department of Soil Science and Water Resources, College of Agriculture, University of Diyala, Diyala, Iraq
4Department of Horticulture and Landscape, College of Agriculture, University of Diyala, Iraq
This study aimed to determinate the impact of soil moisture depletion and surface drip irrigation style on some soil hydraulic properties such as infiltration, hydraulic conductivity, application efficiency, and water use efficiency for the potato crop. A field experiment was carried out in a site located northeast Ramadi, Iraq. The study consists of two factors: the first factor was two levels of moisture depletion percentages 25 and 50%, while the second factor includes two surface drip irrigation styles, which were traditional surface drip irrigation and partial drying surface drip irrigation. Consumptive use for potato plant reached 32.05 cm during the growing season. Results showed a significant influence on the treatments on application and water use efficiencies as well as on infiltration and soil hydraulic conductivity. The combination of the treatments partial drying drip irrigation style and 25% moisture depletion percentage can be recommended to achieve the best irrigation management for potato plant, which improves soil hydraulic properties and meets the best plant response in the same time
Keywords: Solanum tuberosum, water deficit, water consumption use, water use efficiency, yield, drought, trickle, infiltration
Source: Agraarteadus, 2019, 30(2):In Press
doi: https://dx.doi.org/10.15159/jas.19.09

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HOW TO CITE
Aldulaimy, S.E.H., Salman, A. K., Abood, M.A., Hamdi, G.J. 2019. Influence of moisture depletion and surface drip irrigation style on some soil hydraulic properties and potato crop. Agraarteadus, 30(2):In Press. doi: 10.15159/jas.19.09.
AUTHOR CONTACT
1Department of Soil Science and Water Resources, College of Agriculture, University of Anbar, Anbar, Iraq
2Institute of Geoecology, Technical University of Braunschweig, Germany
3Department of Soil Science and Water Resources, College of Agriculture, University of Diyala, Diyala, Iraq
4Department of Horticulture and Landscape, College of Agriculture, University of Diyala, Iraq


 
Highlights: 
  • .

Volodymyr Bulgakov1, Volodymyr Nadykto2, Serhiy Kyurchev2, Viktor Nesvidomin1, Semjons Ivanovs3, Jüri Olt4
THEORETICAL BACKGROUND FOR INCREASING GRIP PROPERTIES OF WHEELED TRACTORS BASED ON THEIR RATIONAL BALLASTING
In Press
Abstract
THEORETICAL BACKGROUND FOR INCREASING GRIP PROPERTIES OF WHEELED TRACTORS BASED ON THEIR RATIONAL BALLASTING
Volodymyr Bulgakov1, Volodymyr Nadykto2, Serhiy Kyurchev2, Viktor Nesvidomin1, Semjons Ivanovs3, Jüri Olt4

1National University of Life and Environmental Sciences of Ukraine, Ukraine, 15 Heroyiv Oborony Str., UA 03041 Kyiv, Ukraine
2
Tavria State Agrotechnological University, 18B, Khmelnytsky Ave, UA72310 Melitopol, Zaporozhye Region. Ukraine
3
Latvia University of Life Sciences and Technologies, 2 Liela Street, LV-3001 Jelgava, Latvia
4
Estonian University of Life Sciences, Institute of Technology, 56 Kreutzwaldi, 51006 Tartu, Estonia
The correct selection of the level of mechanical ballasting for wheeled tractors is among the most important issues for increasing their utilisation efficiency, in particular, increasing their grip properties. The shortcoming of the earlier undertaken investigations was that they virtually did not take into account the allowed maximum pressure of the tractor’s wheels on the soil. At the same time, little attention was paid to the impact of the maximum load-carrying capacity of the wheel tyres. The aim of the paper is to eliminate these deficiencies. Because of the authors’ efforts, the new technique has been developed, which differs in that it employs the requirement of the tyre’s ecofilic properties. The implementation of this requirement implies setting the maximum allowed level of the tractor wheels’ pressure on the soil and taking into account the maximum load-carrying capacity of the wheel tyres as well as the vertically applied load on each of the tractor’s axes under the simultaneous action of both the horizontal and vertical components of the tractive resistance of the employed agricultural implement. The practical effectiveness of the new approach is shown by the example of determining the possibility and level of ballasting the specific wheeled tractor operating as part of a ploughing unit.
Keywords: tractor, ballast, wheel load, tire.
Source: Agraarteadus, 2019, 30(2):In Press
doi: https://dx.doi.org/10.15159/jas.19.07

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HOW TO CITE
Bulgakov, V., Nadykto, V., Kyurchev, S., Nesvidomin, V., Ivanovs, S., Olt, J. 2019. Theoretical background for increasing grip properties of wheeled tractors based on their rational ballasting. Agraarteadus, 30(2):In Press. doi: 10.15159/jas.19.07
AUTHOR CONTACT
1National University of Life and Environmental Sciences of Ukraine, Ukraine, 15 Heroyiv Oborony Str., UA 03041 Kyiv, Ukraine
2
Tavria State Agrotechnological University, 18B, Khmelnytsky Ave, UA72310 Melitopol, Zaporozhye Region. Ukraine
3
Latvia University of Life Sciences and Technologies, 2 Liela Street, LV-3001 Jelgava, Latvia
4
Estonian University of Life Sciences, Institute of Technology, 56 Kreutzwaldi, 51006 Tartu, Estonia


 

Highlights: 
  • Improving operational efficiency of wheeled tractors by means of increasing their grip properties can be achieved through the correct selection of the level of their mechanical ballasting.
  • Solving the problem of ballasting wheeled tractors it is suggested to take as the basis the condition of the ecofilic properties of the tyre.
  • For example, if a tractor with an operating weight of about 8700 kg and the maximum allowable tyre pressure on the soil of 160 kPa unitised with a plough is used, the maximum allowable ballast load on the engine unit may not exceed 39% of its weight.

Margit Olle
SHORT COMMUNICATION: THE EFFECT OF SILICON ON THE ORGANICALLY GROWN LEAF LETTUCE GROWTH AND QUALITY
In Press
Abstract
SHORT COMMUNICATION: THE EFFECT OF SILICON ON THE ORGANICALLY GROWN LEAF LETTUCE GROWTH AND QUALITY
Margit Olle

Estonian Crop Research Institute, J. Aamissepa 1, 48309 Jõgeva alevik, Estonia
The purpose was to assess the effect of silicon on the leaf lettuce production. The experiments in the greenhouse were carried out in the spring 2014 at the Estonian Crop Research Institute. Treatments: 1) stabilized silicic acid treatment; 2) control. Si treatment (2 mL L–1 of silicic acid): First spray, when 1 true leaf was present; second spray was two weeks after spray 1; third spray was two weeks after spray 2. The pH of spray solution was 5.5. pH of spray solution was 5.5. Control plants were treated with water. The plants were 26% higher in Si variant. The width of leaf lettuce was 32% larger in Si variant. In leaf lettuce the phosphorus content was 14% higher, the content of calcium was 32% higher, the content of magnesium was 12% higher in Si variant than in control.
Keywords: growth, leaf lettuce, nutrients, silicon, quality
Source: Agraarteadus, 2019, 30(2):In Press
doi: https://dx.doi.org/10.15159/jas.19.08

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HOW TO CITE
Olle, M. 2019. Short Communication: The effect of silicon on the organically grown leaf lettuce growth and quality. Agraarteadus, 30(2):In Press. doi: 10.15159/jas.19.08
AUTHOR CONTACT
Estonian Crop Research Institute, J. Aamissepa 1, 48309 Jõgeva alevik, Estonia

 
Highlights: 
  • Silicon promoted the growth of lettuce plants and improved its nutritional quality, by increasing phosphorus, calcium and magnesium contents in the leaves of lettuce.

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