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The selected problems of the study on the quality of mineral fertilizer sowing with disc spreaders
2012
Koszel, Milan (University of Life Sciences in Lublin, Lublin (Poland). Faculty of Production Engineering, Department of Agricultural Equipment Exploitation and Management in Agricultural Engineering)
The aim of this study was the influence of working parameters of mineral fertilizer on quality of sowing. The application of fertilizers is conducted with a particular accuracy, mainly characterized by a variation coefficient connected with the surface irregularity (the longitudinal and transverse one in relation to the direction of the unit ride) of the distribution of a fertilizer dose on a field surface. The irregularity of fertilizer spread is a phenomenon which occurs in every case of fertilizer application, both by hand and a machine. Generally, two types of irregularity can be identified, i.e. the punctual and belt one (the transverse and longitudinal one). The punctual irregularity results from a random of fertilizer granules or grains sowed using any method and it is measured on definite, small areas. The belt irregularity results from diverse fertilizer mass distribution in transverse and longitudinal directions in relation to the movement of the distributor.
Show more [+] Less [-]Ecology and work quality of fan flat nozzles
2012
Koszel, Milan (University of Life Sciences in Lublin, Lublin (Poland). Faculty of Production Engineering, Department of Agricultural Equipment Exploitation and Management in Agricultural Engineering)
Working parameters of fan flat nozzles which affect drop tracks size were the subject of the study. New nozzles and nozzles after laboratory wear were tested. The influence of nozzles wear on drop tracks size were examined. It was found that increase in liquid flow rate results in higher values of mean diameter of drop track. Then increase in working pressure or working speed respectively cause decrease in drop tracks size and reduce merging of drops on spray surface. Increase in wear degree was followed by increased coverage rate. This phenomenon is especially dangerous when using nozzles with a considerable degree of wear for agricultural spray since it ecological threat to the environment. These results can be used in practice, because the conducted experiment explained that nozzle wear degree has influence on ecological characteristics of agricultural spray.
Show more [+] Less [-]Optimizing pH of nutrient solution on the growth of aquatic plant, Anubias barteri in hydroponic
2012
Surapi Prachumphon(King Mongkut's Institute of Technology Ladkrabang, Bangkok (Thailand). Faculty of Agricultural Technology. Program in Animal Production and Fishery Technology) | Nongnuch Ladhavisuti(King Mongkut's Institute of Technology Ladkrabang, Bangkok (Thailand). Faculty of Agricultural Technology. Program in Animal Production and Fishery Technology)
Influence of Soil Cultivation Technologies and Fertilisation on Productivity and Energy Production of Arable Crops
2012
Žák, Š., Plant Production Research Center, Piešťany (Slovak Republic) | Macák, M., Slovak Agricultural Univ. in Nitra (Slovak Republic) | Hašana, R., Plant Production Research Center, Piešťany (Slovak Republic)
The influence of three soil tillage technologies and two fertilisation levels on a productivity of crops and biomass for energy use, expressed in yield, cereal units (CU), energy acquired and indicative price of energy per hectare was evaluated at the experimental fields of Research Institute of Plant Production in Piešťany during 2007-2009. The highest yield of dry matter has been identified for maize for silage 19.41 t per ha, followed by winter oilseed rape 15.77 t per ha, triticale 15.39 t per ha and winter wheat 14.08 t per ha. Conventional tillage created soil condition for higher yield of dry matter in an average 17.92 t per ha, followed by minimum soil tillage 16.27 t per ha and no-till-age technology 14.3 t per ha. Nitrogen-based fertilisation (N120) has ensured a significantly higher yield of dry matter and a higher price of acquired energy €491.1 compared with €462.1 of zero-nitrogen fertilisation. The highest yield of cereal units has been identified for maize for silage 9.01 CU, followed by winter wheat 5.21 CU, triticale 4.70 CU and winter oilseed rape 4.55 CU. Energy of maize for silage has been calculated from biogas, winter oilseed rape from rape methyl ester, straw and crop residues, and for winter wheat and triticale from ethanol and straw. Average energy storage in plant biomass of crop rotation was 222.93 GJ per ha. The highest amount of energy acquired has been identified for winter oilseed rape 342.80 GJ per ha, followed by maize for silage with 236.99 GJ per ha, winter triticale 159.39 GJ per ha and winter wheat 152.52 GJ per ha.
Show more [+] Less [-]HOW TO MAKE AGRICULTURE PRODUCTION IN PROTECTIVE AREAS PROFITABLE?- PROJECT IDEA ON THE EXAMPLE OF REPUBLIC OF CROATIA
2012
Tea Golja | Sanja Dolenc | Vladimir Marinkovic
Agriculture has a significant impact on many economic activities. Its development is very important for every economy. Modern lifestyles as well as the increasing recognition of the value of sustainable development had influenced organic farming which importance has risen on the market as a significant and sustainable in the long-run. The subject of this paper is farming in protected areas in the Republic of Croatia. The same is achieved by conducted empirical research on shopping centres in Istria (primary research) and specific systematization and analysis of data from secondary sources. This has also proven the fundamental hypothesis that in the long run the agricultural situation in the Republic of Croatia is unsustainable due to the fact that too small and fragmented farms with inadequate institutional structure cannot be competitive and survive on the market. The goal of the paper was achieved by presenting proposals and arguments to improve the conceptual design of the present state in Croatia through the OTN Company, with special emphasis on production in protected areas.
Show more [+] Less [-]Logistics in agricultural production
2012
Vaněček, D. | Kaláb, D.
In spite that the great importance of logistics in industry, business and other branches is generally acknowledged, this problem is not systematically investigated in agriculture. As a presumption of a detailed analysis, the knowledge of the volume and structure of the material flow is necessary. The authors have proposed their own methodological procedure which issues from technological indicators, published by the Ministry of Agriculture CR for individual plants and categories of animals and which makes possible a further classification of these data for enterprises with different level of farming. These published standards of the Ministry serve as basic stones and by means of their combination, the volume of material flow and its structure during one year periods is possible to calculate. The advantage of the proposed method is a fast finding out of necessary data and possibility of taking into account some specific conditions of the investigated enterprises.
Show more [+] Less [-]Increasing agricultural production in India
2012
Hooda, Bhupinder Singh
Method for measuring of N2O emissions from fertilized soil after the using of fertilizer spreader
2012
Šima, Tomáš (Slovak University of Agriculture in Nitra, Nitra (Slovak Republic). Faculty of Engineering, Department of Machines and Production Systems) | Nozdrovický, Ladislav (Slovak University of Agriculture in Nitra, Nitra (Slovak Republic). Faculty of Engineering, Department of Machines and Production Systems) | Krištof, Koloman (Slovak University of Agriculture in Nitra, Nitra (Slovak Republic). Faculty of Engineering, Department of Machines and Production Systems) | Dubeňová, Monika (Slovak University of Agriculture in Nitra, Nitra (Slovak Republic). Faculty of Engineering, Department of Production Engineering) | Krupička, Josef (Czech University of Life Sciences, Prague (Czech Republic). Faculty of Engineering, Department of Agricultural Machines) | Králik, Stanislav (Slovak University of Agriculture in Nitra, Nitra (Slovak Republic). Faculty of Engineering, Department of Machines and Production Systems)
The use of fertilizer spreaders is accompanied by a different quality of work these machines, which can cause local overdosing of the fertilizers. Consequently, there may occur the increased formation of nitrous oxide (N2O) emissions from the soil to the atmosphere. The aim of the paper was to compare the field and the laboratory method, which can be used for measuring of the N2O emissions released from the soil to the atmosphere. For the purpose of emissions measuring the INNOVA devices with measurement system based on the photo-acoustic infrared detection method was used. Experiment was conducted 10 days after the field was fertilized. During experiment were used the VICON RS-L fertilizer spreader and the Calk Ammonium Nitrate fertilizer. There were found statistically significant differences between the size of the application rate and concentration of the N2O emissions released from soil to the atmosphere. No statistically significant differences were found in comparison of this two methods and this fact indicate the possibility to replace the field method by the laboratory method.
Show more [+] Less [-]Seasonal migration and agricultural production in Vietnam
2010 | 2012
de Brauw, Alan | http://orcid.org/0000-0002-5045-8939 de Brauw, Alan
PR | IFPRI3; ISI | PHND
Show more [+] Less [-]Seasonal migration and agricultural production in Vietnam
2012
de Brauw, Alan
PR; | IFPRI-3; ISI | PHND; | Journal article
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