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The paper aims to present models of agricultural production optimization as tools for managers to increase yield, crop structure, crop rotation, increased efficiency and profitability. The two optimization models are: Case 1: Optimization of yield depending on wheat price and subsidy for increasing net return and profitability in wheat culture; Case 2: Optimal model for optimizing crop rotation in cereal culture with maximum income, having two solutions: (a) Basic optimal primal solution and (b) Basic optimal dual solution. The methodology included the calculations regarding the specific indicators reflecting the economic efficiency in wheat cropping for Case 1 and determination of the optimal primal and dual solutions assisted by SOLVER application from MS Excel for Case 2. The two examples come from vegetal farming but, other models of optimization could be developed in animal production for improving livestock structure by species and category and also in animal feeding setting up optimized feed ratios to sustain production. [ABSTRACT FROM AUTHOR]

The paper analyzed the evolution animal sector regarding livestock and production in Romania in the period 2007-2020. Two sub-periods: P1- 2007-2013 and P2 2014-2020 were compared for assessing if the achievements in P2 were superior. The data from the National Institute of statistics regarding livestock and production by species were processed using fixed basis index, structural index, regression equations, coefficient of determination, multi annual mean per decade, absolute and relative differences between P2 and P1, in order to emphasize the trends and changes during the studied period. The results emphasized the following: the number of bovines, pigs and poultry decreased, while the number of sheep and goats and bee families increased both in P2 and P1. The total animal live weight at slaughter diminished due to the lower and lower live weight of bovines and pigs. However, the increased live weight at slaughter of sheep, goats and poultry had a positive impact. Milk and egg production declined and continued in P2, while wool and honey production increased. Despite that agricultural production value in animal sector increased by +20,420 trillion Lei in 2020 versus 2007, it was by 68.61% smaller than the agricultural production value achieved in the vegetal sector. In consequence, the contribution of animal sector to agricultural output was just 31.39% in the year 2020. The gaps in domestic production have to be covered by imports to meet consumers' requirements and this will deepen the deficit in agro-food trade balance. The reduction of CO2 emissions in agriculture, where 50% come from animal sector, obliges farmers to set up strategies destined to promote animal products obtained from more environment friendly technologies. [ABSTRACT FROM AUTHOR]

The paper analyzed Romania's agro-food export, import and trade balance with the EU-27 countries in the period 2013-2021 using the empirical evidence from National Institute of Statistics. Fixed basis and structural indices, as well as Herfindahl-Hirschman Index (HHI), Gini-Struck Index (GSI) and the Coefficient of Concentration (CC) were used to characterize the concentration degree of the agri-food trade. In 2021, export value accounted for Euro 5,471.8 Million, import value for Euro 8,459.7 Million and the trade balance registered a deficit of Euro -2,987.9 Million. The figures reflect an increase both in export and import, but import exceeded the export reflecting that Romania is a net importer of agro-food products. The highest market share in Romania's export is kept by Italy, Bulgaria, Netherlands, Spain, Germany, Hungary, France, Greece, Belgium and Poland, while the main import partners are Germany, Hungary, Poland, Netherlands, Bulgaria, Italy, Spain, France, Greece and Belgium. The concentration degree both in case of export and import is small as proved by the values of HHI, ranging between 0.0845 and 0.0996 for export and between 0.1065 and 0.1106 for import. GSI values ranged between 0.2220 and 0.2406 for export and between 0.2687 and 0.2764 for import. CC values were below 0.5 also reflecting a competitive market. To diminish the dependence of imports, agro-food export has to be stimulated by the increase of agricultural production which has to provide more products with high value added and of a higher quality to enhance competitiveness, and also imports have to be revised and a better resource allocation is needed to strengthen internal production and cover better domestic consumption. [ABSTRACT FROM AUTHOR]

The paper analyzed the importance of production and import in food availabilities in Romania in the period 2015-2020, using the data provided by National Institute of Statistics. the following indicators were studied: total consumption, consumption per inhabitant, production, production/consumption rate, import, import/consumption rate, export, trade balance, import/export ratio, food availabilities, production share and import share in food availabilities, self-sufficiency rate. Dynamic analysis, mean, growth rate in 2020 versus 2015, comparisons were the main tools used for data processing. The results showed that consumption increased for fruits, vegetables, meat, fish, and declined for potatoes, cereals, sugar and eggs, as consumers are more oriented to a healthier diet. Production increased for fruits (26.7%), meat(3.3%), potatoes (2.8%), but it declined for sugar (-65%), eggs (- 17%), milk (-5%), fish (-5%), and vegetables (-2.7%). In 2020 vs.2015, production covered consumption of cereals, potatoes, fruits, eggs and milk, but not for meat and fish. Imports increased for all the products, the growth rates varying between 136.7% for sugar and 17% for fish and cereals. The coverage rate of consumption by import was 101% for cereals, 97% for sugar, 91% for fish, 64% for fruits, 39% for meat, 38% for fats, 29% for potatoes, 23% for milk, 17% for vegetables and 10% for eggs. Agro-food export increased for all the products, but with a lower rate than import, resulting a negative trade balance, cereals and honey being excepted. Import/export ratio was the smallest for cereals (0.34), but high for the other products (21.5 for potatoes, 13.7 for fish, 12 for fruits, 10.1 for vegetables, 4 for milk, 3.8 for sugar, and 3.6 for meat). Self-sufficiency rate was over 100% for cereals and honey, and below 100% for all the other products, the lowest level being for fish and sugar. The share of import in food availabilities was 91% for fish, 89% for sugar, 39% for meat, 35.9% for fruits, 32.4% for cereals, 30% for fats, 20.7% for vegetables, 18.4% for milk, 17.6% for potatoes, and 8.1 % for eggs. As a conclusion, the high share of imports is a result of the incapacity of agricultural production to cover market needs for all the product categories. Farmers have to increase productivity, product quality, to join in associative forms, and create short supply food chains to sell their products. Imports are justified mainly in cases where production is not sufficient to cover the internal market. [ABSTRACT FROM AUTHOR]

The paper analyzed rural population, rural working age population, civil population occupied in agriculture and agricultural output value using the data from National Institute of Statistics for the period 2008-2020. Trend line, regression equations, coefficient of determination, Spearman's rank correlation coefficient represented the methodological means for processing the data. Romania had still a high labour resource accounting for 6.23 million persons in 2020, by 10% more than in 2008. In the period 2008-2020, the population able to work declined in almost all the regions, except North East and Bucharest Ilfov, but, the rural population having the age to work increased in various proportions in all the regions. However, civil population occupied in agriculture declined by - 30% from 2,407 thousand persons in 2008 to 1,681 thousand persons in 2020. Population aging and migration are the main causes of this decrease. The decline in the territory ranged between -31.3% in North East and -25% in Bucharest-Ilfov. Agricultural production value increased by +21.6% from Ron 66,993 Million in 2008 to Ron 81,400 Million in 2020. In 2020, the highest agricultural output value was achieved in South Muntenia, North East, North West, South West Oltenia, South East. Analyzing the linear dependency between the ranks of civil population occupied in agriculture and agricultural output value, we noticed that in 2008, it was not found such a connection, as Spearman's correlation coefficient was rS = 0.1004, tcrit 6;0.05 was 1,943 and RI = 0.4748 < 0.1943. However, in 2020, between the ranks of the two studied indicators was found a linear dependency reflected by rS = 0.739, RI = 2.26, tcrit 6;0.05 was 1,943, therefore RI > tcrit. As a final conclusion, while the population occupied in agriculture decreases, agricultural production value increases due to the decline in civil population occupied in this economic sector caused by aging and migration, increased performance in agricultural production, grace to technological progress and a better farm management, price volatility for agricultural products, financial support according to the CAP of the EU and Romania's Government. [ABSTRACT FROM AUTHOR]