Table 2. Factor component score of Italian ryegrass yields, climatic and jitter transformed soil physical variables to check the reduction effectivity in the paddy data

Variables (unit)	Components
Variables (unit)	1	2	3	4	5
Autumnal growing days (day)	0.31	0.34	0.88	0.02	−0.17
Autumnal accumulated temperature (°C)	0.44	0.23	0.81	−0.07	−0.08
Spring growing days (day)	0.80	0.33	0.31	0.29	0.04
Spring accumulated temperature (°C)	0.78	0.26	0.40	0.36	0.07
Spring amount of precipitation (mm)	0.11	0.27	0.11	0.94	−0.14
Spring days of precipitation (day)	0.26	−0.10	0.03	0.58	0.15
Jitter transformed drainage class	0.63	0.21	0.37	0.16	−0.14
Jitter transformed gravel content	0.04	0.00	0.22	0.09	0.09
Jitter transformed slope	−0.38	0.06	−0.13	−0.06	0.88
Jitter transformed effective soil depth	−0.37	−0.10	−0.13	−0.10	−0.65
Fresh matter yield (kg ha⁻¹)	0.22	0.97	0.15	−0.02	0.04
Dry matter yield (kg ha⁻¹)	0.21	0.85	0.23	0.18	0.12
Explained variance (%)	19.87	17.93	16.58	12.68	10.99
Accumulated variance (%)	19.87	37.80	54.38	67.06	78.05