Q54, Q51, D83, C91, Q58
O13 (Economic Development: Agriculture; Natural Resources; Energy; Environment; Other Primary
Products), Q48 (Energy: Government Policy), C93 (Design of Experiments: Field Experiments), L94 (Industry
C81, C93, D81
C93, D83, J16, L26, O12
C93, J15, J61, J71
J22, J16, J38, D83
F22, J61, O15, C93, O12
D83, D84, G11, G12, G41, G51
Q48, Q54, D83, C93
C93, D14, D15, E21