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The paper purpose was to assess the impact of climate change on wheat, maize and sunflower yield in the period 2017-2021, using statistical data from National Institute of Statistics (NIS) and National Administration of Meteorology (NAM) and other sources. Comparison method was used to evaluate the deviations between the registered air temperatures and precipitations and the 1981-2010 climatological norm. Graphic method reflected the dynamics of monthly air temperatures and rainfalls in each year. Descriptive statistics for mean, standard deviation and coefficient of variation reflected an more comprehensive image upon air temperature, precipitations and yield. Correlations and regression equations were used to establish the intensity of the kinks between climate factors and yield. The highest average air temperature In Romania was 12.130C in 2019. In the period 2017-2020, the average annual temperatures exceeded the climatological norm 1981-2010 accounting for 9.10C. The lowest rainfalls, 614.2 mm, were recorded in 2019, being below of 633.1 mm the norm for the period 1981-2010. The high temperatures associated with drought and low precipitations have deeply affected yield of many agricultural crops, including maize, wheat and sunflower. The highest wheat yield 4,888 kg/ha was achieved in 2017, and the lowest one, 2,966 kg/ha in 2020. Maize registered the highest performance of 7,644 kg/ha in 2018, and the lowest one, 3,977 kg/ha in 2020. Sunflower carried out the high performance 3,041 kg/ha in 2018, and the lowest one, 1,858 kg/ha in 2020. The worst agricultural years for these three crops was 2020, but 2017 favored wheat, while 2018 favored maize and sunflower. The correlation coefficient had in general small values between average temperature and yield, but a higher link with precipitations level. The multiple correlation between yield, air temperatures and precipitations was: r= 0.817 for wheat, r = 0.116 for maize and r = 0.504 for sunflower. In the South Eastern Dobrogea, the driest area in Romania, the rainfalls declined by 65% in the period 2018-2020 having a deep negative impact on sunflower seeds yield, which decreased from 4,282 kg/ha in 2018, to 1,503 kg/ha in 2020. The correlation between precipitations and sunflower yield positive and very strong (r = 0.737). As a conclusion, the climate conditions should be analyzed in each farm and farmers have to take measure to adapt the technologies for sustaining production. [ABSTRACT FROM AUTHOR]

The paper analyzed the dynamics of cultivated area, production and yield in vegetal sector of Romania's agriculture in the period 2007-2020 and also in the decade 2014-2020 versus 2007-2013 in order to quantify the effects of the implemented agricultural strategy aligned to the EU CAP. The data from National Institute of Statistics were processed using fixed basis indices, structural indices, growth rate, mean, regression models, R square and comparisons between the two decades. In 2020, Romania had 8,263,672 ha cultivated by +6.25% more than in 2007. Crop structure included: cereals 64.6%, oil plants 20.3%, vegetables 2.4%, leguminous plants 1.3% and 1% potatoes. The area cultivated with cereals raised by +4.07% reaching 5,338,067 ha in 2020, of which maize and wheat 87.9%. In the decade 2014-2020 versus 2007-2013, it was registered a larger total cultivated area and also with cereals (wheat and maize), leguminous crops, oil crops (sunflower), but a reduced area with vegetables and potatoes. Cereals production increased by +132.29% accounting for 18,153,714 tons in 2020, of which maize 55.61% and wheat 35.2%. In the period 2007-2020, important production gains were carried out in leguminous grains, oil seeds, fruits and vegetables, but potatoes production declined by -49.63%. In the period 2014-2020 versus 2007-2013, production gains were registered in cereals, wheat, maize, leguminous grains, in oil seeds, sunflower seeds and fruits, but losses by -4.14% in vegetables and -21.26% in potatoes. In 2020 versus 2007, yield level was accounted for 3,400 kg/ha cereals (+123.24%), 2,966 kg/ha wheat (+92.47%), 3,977 kg/ha maize (+160.61%), 1,858 kg/ha sunflower seeds (+184.09%), 15,843 kg/ha potatoes (+15.95%), 21,858 kg/ha tomatoes (+57.07%). In the period 2014-2020 versus 2007-2013, yield gain accounted for: +50.08% cereals grains, +44.7% wheat, +54.18% maize, +61.5% sunflower seeds, +13.13% potatoes and +12.83% tomatoes. In conclusion, the implementation of Romania's strategy of agriculture development in the vegetal sector aligned to CAP has resulted in higher productions and yields of the analyzed groups of crops, except potatoes production which declined by about 50% in 2020 compared to 2007, and also, in the 2nd decade 2024-2020 versus 2007-2013, it was registered a decrease by -4.14% in vegetables and by -21.26% in potatoes, which is justified by the decline in cultivated area. This performance is due to the efforts made by farmers to obtain better results in their business and to the financial support given by the EU and Romanian Government. [ABSTRACT FROM AUTHOR]