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P01 Nature conservation and land resources [14]
P06 Renewable energy resources [1]
P11 Drainage [1]
P30 Soil science and management [8]
P32 Soil classification and genesis [1]
P33 Soil chemistry and physics [14]
P34 Soil biology [3]
P35 Soil fertility [4]
P40 Meteorology and climatology [1]
Q Food science [2]
Q01 Food science and technology [32]
Q02 Food processing and preservation [8]
Q04 Food composition [5]
Q05 Food additives [1]
Q54 Feed composition [1]
S20 Physiology of human nutrition [1]
T Pollution [1]
T01 Pollution [2]
U10 Mathematical and statistical methods [7]
U30 Research methods [1]