pneumatic pump feeding seeds from the hopper into drums and openers before sowing into the soil

aggregate agriculture and angle attack automation bearing before chisel combined complex coulters cracking crop crust cultivation discs disks drums earth ecology equipment farm feeding fertilizer field fluffing food from grain harrow harvest haze hopper industry insertion into land modern opener openers pneumatic possibility pump rack seeder seeds shattering simultaneous smashes soil sowing spring summer technique technology tillage unit work