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The broomrapes are root, obligate parasites without chlorophyll. They parasitize mostly the dicotyledonous plants. Phelipanche ramosa (L.) Pomel attacks a wider range of hosts among which is the winter oilseed rape (Brassica napus L.). The broomrape can reduce the yields and aggravate the quality of production. There are few effective measures to control this parasite. One of the most promising approaches is the cultivation of Clearfield® oilseed rape and the treatment of imazamox-containing herbicide products. For this purpose during the growing seasons of 2016 - 2017 and 2017 - 2018 a field pot experiment with the Clearfield® oilseed rape hybrid РТ 228 CL was conducted. The soil of the field pots was artificially infested with Ph. ramosa seeds. The herbicide application was performed in two stages of the crop in the spring - BBCH 31–33 (1-3 internodes visible) and BBCH 51 („green button“). Variants of the trial were: 1. Untreated control; 2. Cleranda® (375 g/l metazachlor + 17,5 g/l imazamox) – 2,00 l/ha (BBCH 31–33); 3. Cleravo® (250 g/l quinmerac + 35 g/l imazamox) – 1,00 l/ha (BBCH 31–33); 4. Pulsar® Plus (25 g/l imazamox) – 1,00 l/ha (BBCH 31–33); 5. Pulsar® Plus – 2,00 l/ha (BBCH 31–33); 6. Pulsar® Plus – 0,50 l/ha (BBCH 51); 7. Pulsar® Plus – 1,00 l/ha (BBCH 51); 8. Pulsar® Plus – 2,00 l/ha (BBCH 51). Average for both years of the study, the highest efficacy against the parasite after the application of Pulsar® Plus – 2,00 l/ha (BBCH 51) – 92,9% followed by Cleranda® – 2,00 l/ha (BBCH 31–33) - 91,2% was reported.

The objective of this study was to investigate the impact of foliar zinc application in the form of zinc hydroxy nitrate suspensions on maize grain yield and quality and on zinc distribution in the plant organs. The preparation of the zinc hydroxide nitrate (Zn5(OH)8(NO3)2·2H2O) was performed by pouring a NaOH solution into Zn(NO3)2·6H2O under vigorous stirring. All samples were characterized in detail by X-ray diffraction, scanning electron microscopy, thermal analysis, and inductively coupled plasma (ICP) mass spectrometry to determine their content, morphology and physicochemical properties. The field experiment was conducted at the Research Farm, Agricultural University, Bulgaria, via a randomized block design with eight variants in 3 replications. A significant (p < 0.05) effect on Zn accumulation in the maize stems and leaves by foliar zinc application during the first growth stage was found. The accumulation of zinc was followed by its remobilization from the stems to other plant organs during the second growth stage. It was concluded that the synthesized zinc hydroxy nitrate has potential as a long-term foliar fertilizer. Ensuring the optimal concentration of Zn at different times during the vegetative period lead to a substantial increase in the grain yield along with an improvement in the quality of the corn grain for all variants compared to those of the control.

The main objective of the research is based on the results of the analysis and evaluation of the innovative technologies in agriculture, to justify the possibilities for their accelerated deployment and the development of the potential for increasing the production capacity, comparative advantages and competitive abilities of the agrarian sector.The survey was conducted in 2010-2017 and includes the following stages: The theoretical essence and the peculiarities in the formation of competitive opportunities of innovative technologies in agriculture are justified; A methodology for research and evaluation of innovative technologies in agriculture has been selected and a model has been proposed to take into account the peculiarities of the sector; • Based on the results of field trials, the biological and economic potential of a particular innovation technology model has been assessed; Competitive capabilities of the innovative technology were analyzed, using the obtained production results of 232 farms in the country; The aggregate influence of the particular technological model on increasing the production potential and competitive opportunities of production has been investigated; The role of public support and the institutional model used to enhance competitive potential has been assessed on the basis of the Agricultural Policy Analysis Matrix; There are opportunities to accelerate the innovation process in the agrarian sector through technological, organizatio Основната цел на проведеното научно изследване е на базата на резултатите от анализа и оценката на иновационните технологии в земеделието, да се обосноват възможностите за тяхното ускорено внедряване и развитие на потенциал за повишаване на производствения капацитет, сравнителни предимства и конкурентни способности на аграрния сектор.Изследването е проведено в периода 2010-2017 г., и включва следните етапи: Обоснована е теоретичната същност и особеностите при формиране на конкурентните възможности на иновационните технологии в земеделието; Селектирана е методика за изследване и оценка на иновационните технологии в земеделието, като е предложен модел за отчитане особеностите на сектора; На базата на резултатите от проведени полски опити са оценени биологичния и икономически потенциал на конкретен иновационен технологичен модел; Анализирани са конкурентните възможности на иновационната технология, като са използвани получените производствени резултати от 232 земеделски стопанства в страната; Изследвано е съвкупното влияние на конкретния технологичен модел за повишаване на производствения потенциал и конкурентните възможности на производството; На базата на матрицата за анализ на аграрни политики е оценена ролята на обществената подкрепа и използвания институционален модел за повишаване на конкурентния потенциал; Обосновани са възможности за ускоряване на иновационния процес в аграрния сектор, посредством технологични, организационни и институционални мерки