20.500.12556/RUL-180578 Agroclimatic indicators and maize yield variability in Slovenia a PCA and correlation analysis This study examines the influence of agroclimatic indicators on the variability of maize crop yield in Slovenia. Principal Component Analysis (PCA) was conducted on three categories of agroclimatic indicators: temperature and heat stress during the growing season, spring frost conditions, and precipitation conditions during the growing season. Six principal components were identified, each accounting for at least 64% of the variability in the initial datasets. Spearman correlation analysis between the principal components and maize yield at two trial sites revealed statistically significant correlations for three components: 'high precipitation conditions,' 'temperature conditions during the growing season,' and 'maize plant heat stress conditions.' Maize yield at the trial sites exhibited a positive correlation with slightly above-average precipitation during the growing season, whereas a weak negative correlation was observed with elevated growing season temperatures and maize plant heat stress conditions. The historical spatial distribution of the principal components indicated average conditions across most of the region, with some regional variations. Future projections suggest an increase in the frequency of high precipitation events, primarily in regions that already experienced sufficient precipitation historically. Warmer growing season conditions and significantly more frequent heat stress conditions are also anticipated under RCP4.5 and RCP8.5 scenario, particularly in the southwestern, central, and eastern parts of the country. The results of the study suggest a potential decline in future maize yields at the trial sites due to the projected increase in temperature and heat stress conditions. These findings offer valuable insights for agricultural planning and climate adaptation strategies in Slovenia. agroclimatic indicators principal component analysis crop yield climate change climate projections agroklimatologija PCA statistična analiza pridelek klimatske spremembe klimatske projekcije true false true Angleški jezik Slovenski jezik Članek v reviji 2026-03-11 12:48:43 2026-03-11 12:48:46 2026-03-12 04:44:54 0000-00-00 00:00:00 2026 0 0 17 str. art. 128066 Vol. 177 2026 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 551.50 1161-0301 10.1016/j.eja.2026.128066 271265539 1-s2.0-S1161030126000857-main.pdf 1-s2.0-S1161030126000857-main.pdf 1 57E9F9BC9FFB5A7ECDFE887F7A71ED53 bfb2c158d3e01be9ad3970b484b05156e673a31e669c96a63dd75c241a10c0e8 7cedd9a9-1d40-11f1-b0ab-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=230062 https://www.sciencedirect.com/science/article/pii/S1161030126000857 1 43f34240-1d40-11f1-b0ab-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=230055 Biotehniška fakulteta 0 0 0