Seeding method by means of a seed sowing machine (S) connected to a tractor corn- prising at least one hopper (20.1) for containing a mass of seeds and means (20.2) for distributing and separating the seeds contained in said at least one hopper, and furrower means (70) that, during advance of the tractor on said portion of ground to be sown, form at least one furrow, in which the seeds are deposited, said method comprising the steps consisting of: - providing in said seed sowing machine (S) of the seed conveying means (20.4, 20.52)； - providing in said seed sowing machine (S) pneumatic means (20.5, 20.51) that produce and direct a compressed air flow along said seed conveying means (20.4, 20.52)； - separately transporting each seed along said seed conveying means (20.4, 20.52)； - providing in said seed sowing machine (S) pneumatic ejection means (20.53) of the seeds to be deposited, which have an end part configured as seed ejection mouth； - arranging said seed ejection mouth of said pneumatic ejection means (20.53) above said at least one furrow； - propelling and ejecting by means of said compressed air flow each seed sequentially in said at least one furrow. According to the invention, said method is characterized by the steps consisting of: - providing in said seed sowing machine (S) means for supporting, deploying and de- positing a mulching sheet (P)； - arranging a portion of said mulching sheet (P), which is unwound from said at least one reel (80.7), below and close to said seed ejection mouth of said pneumatic ejection means (20.53) and above said at least one furrow, on which the mulching sheet (P) is superimposed； - forming in said portion of said mulching sheet (P), which is deposited on the ground during advance of said tractor, a series of holes (V) corresponding to said at least one furrow and produced by means of perforation of the sheet (P) by seeds propelled in sequence through said ejection mouth of said pneumatic ejection means (20.53) and which a
