), O13 (Economic Development: Agriculture; Natural Resources; Energy; Environment), C93 (Field Experiments)
J28, J46, J81, O12, O17
J08, J41, O12, O14
D82, L11, O12
O12, D22.
I38, J46, C93, O12, D91, D90, H55, J18
O12, I32
I14, I15, J16, O12
O12; C93; D62; N55; Q16; Q53
D14, G22, G41, G52, G53, H53, H55, I38, J32, O12, O17