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Variable	Model driver group	Used_in	Description
Increase in irrigated area - grid	Technological change in agriculture and forestry	Land-use allocation	Increase in irrigated area, often based on external projections (e.g., FAO).
Production system mix	Technological change in agriculture and forestry	Livestock systems Nutrients	Livestock production is distributed over two systems for dairy and beef production (intensive: mixed and industrial; extensive: pastoral grazing), and to three systems for pigs (backyard, intermediate, intensive) and poultry (backyard, boilers, laying hens) with specific intensities, rations and feed conversion ratios.
Irrigation project efficiency	Technological change in agriculture and forestry		Ratio of quantity of irrigation water required by the crop (based on soil moisture deficits) to the quantity withdrawn from rivers, lakes, reservoirs or other sources. This parameter is given at country level.
Irrigation conveyance efficiency	Technological change in agriculture and forestry		Ratio of water supplied to the irrigated field to the quantity withdrawn from the water source, determining the quantity of water lost during transport. This parameter is defined at country level.
Animal productivity	Technological change in agriculture and forestry	Livestock systems	Effective production of livestock commodities per animal per year.
Livestock rations	Technological change in agriculture and forestry	Livestock systems Nutrients	Determines the feed requirements per feed type (food crops; crop residues; grass and fodder; animal products; scavenging), specified per animal type and production system (extensive/intensive/backyard/intermediate/intensive/broiler/laying hens).
Manure spreading fraction	Technological change in agriculture and forestry	Nutrients	Fraction of manure produced in staples that is spread on agricultural areas.
Energy intensity parameters	Technological change in the energy system	Energy demand	Set of parameters determining the energy use per unit of economic activity (in absence of technical energy efficiency improvements).
Technology development of energy conversion	Technological change in the energy system	Energy supply and demand Energy conversion	Learning curves and exogenous learning that determine technology development.
Learning rate	Technological change in the energy system	Energy supply	Determines the rate of technology development in learning equations.
Energy efficiency technology	Technological change in the energy system	Energy demand	Model assumptions determining future development of energy efficiency.
Technology development of energy supply	Technological change in the energy system	Energy supply and demand Energy supply	Learning curves and exogenous learning that determine technology development.
Trade policy	Trade regimes, tariffs and barriers	Agricultural economy	Assumed changes in market and non-market instruments that influence trade flows, subject to WTO rules and country and region regulation.
Trade restriction	Trade regimes, tariffs and barriers	Energy supply	Trade tariffs and barriers limiting trade in energy carriers (in energy submodel).

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