Various sequences of crops have been grown (see Lapa et al (2011) for rotations between 1992 and 2007)
farmyard manure exposure
With FYM (40 t/ha)
Applied once per rotation at 40 or 60 t ha-1.
NPK fertilizer exposure
To provide N at 83 kg N ha-1, P at 61 kg P ha-1 and K at 112 kg ha-1
Lapa, V.V., Seraya, T.M., Bogatyreva, E.N. et al. The effect of long-term fertilizer application on the group and fractional composition of humus in a soddy-podzolic light loamy soil. Eurasian Soil Sc. 44, 100–104 (2011)