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N01 Agricultural engineering [15]
N20 Agricultural machinery and equipment [5]
P Natural resources [3]
P01 Nature conservation and land resources [6]
P06 Renewable energy resources [1]
P30 Soil science and management [2]
P33 Soil chemistry and physics [3]
P35 Soil fertility [2]
Q01 Food science and technology [8]
Q02 Food processing and preservation [2]
S20 Physiology of human nutrition [1]
T Pollution [1]
U10 Mathematical and statistical methods [3]