This experiment began in 1923. The land uses in the project are:
1923-66 "free" rotation, 50% cereals,50% non-cereals; since 1967 4
year rotation either fodder beet,winter wheat,potatoes,winter wheat ...
This experiment began in 1975 at a cool temperate site with brown
calcereous, slightly hydromorphic soil. Before the experiment began
the soil had been cultivated for at least 20 years according to ...
This experiment was initiated in 1965 at a site that has been in
arable use for a very long time. The land use in this experiment
consists of a cropping sequence: Sugar beet, Spring oats, Winter