), O13 (Economic Development: Agriculture; Natural Resources; Energy; Environment), C93 (Field Experiments)
Q50, Q54, Q56, Q58, O13, O10
I15, J22, J24, J43, O13
O13, Q5
Q42,O13, Q51, Q57, C93
Q54; Q56; O13; I18
D81; D25; O12; O13; Q12; Q54
D91, D15, O16, O13
D83; D91; O13; O33; Q54
D81, O12, O13, Q54