field of yellow flowering oilseed on a cloudy blue sky in springtime (brassica napus), blooming canola

agricultural agriculture background bio biofuel bloom blooming blossom blue brassica canola cloudy cole coleseed color colza country countryside crop day eco ecologic ecology energy environment farm farming farmland field flora flower flowering fossil gold green industry land landscape napus natural nature oil oilseed pla plant rapa rapeseed rural season seed sky spring springtime yellow