Energy economics, supply and demand; energetics, energy accounting, budget, subsidy, cost; energy flow,

energy ratio;

Conservation, requirements and use of energy (including animal draught, animal traction energy) in the

production, processing, marketing and transportation of agricultural products;

Energy storage; power conversion devices; power distribution;

Power plants for agricultural or rural use.

For: non-renewable energy resources, see P07

renewable energy resources, see P06

rural electrification, electrical and electronic engineering, see N01