soil, prepared soil or other substrates) is vital. The two most used soil treatments are pasteurisation and sterilisation. Depending on the necessity, pasteurisation is to be preferred as this does not kill all organisms. Sterilisation can be done when trying to grow truly difficult crops. To pasteurise the soil, the soil is heated for 15 minutes in an oven of 120 °C. See also Advance sowing Plant propagation Planter (farm implement) Priming (agriculture) Seed drill; a mechanical aid allowing much better and faster seed dispersal than when done by hand References Horticultural techniques Horticulture Agronomy Habitat management equipment and methods Plant reproduction Seeds