How many agricultural [general] seed planters (they plant most general
food crops for eg. maize, wheat, soya, sunflower, barley etc), also
known as seed drills, were sold worldwide each year starting from 2001
to 2005 and then to present and what was the overall monetary value of
the mahines
sold? If possible please split figures up into regions like North
America, Western Europe, Eastern Europe, Australia etc.
I would like independant figures, if possible, for the USA, Australia,
EU, Ukraine, Russia and China, but especially first three.
Please list your references and provide web addresses etc.

Seems to me you will also need a line on used, but overhauled drills
and Conversion kits to get full picture.

Hard to think of something the would make an existing drill obsolete,
now that Tractors are so big.

For this particular exercise please concentrate on new machines only.

These machines do not really become obsolete as such in terms of basic
working components, although technology in them does advance quite
rapidly in terms of precision and controls, however they do ware out
quite quickly due to the fairly harsh and abrasive environment they
work in.