1) Surplus a) Extra production that allows trading b) Agricultural technique to prepare soil for seeds c) Irrigation technique to water crops d) Mineral that provides fertility to the soil e) Cradle of agriculture and civilizations f) Exchange and negotiaition of products among different territories 2) Trade a) Extra production that allows trading b) Agricultural technique to prepare soil for seeds c) Irrigation technique to water crops d) Mineral that provides fertility to the soil e) Cradle of agriculture and civilizations f) Exchange and negotiaition of products among different territories 3) Plow a) Extra production that allows trading b) Agricultural technique to prepare soil for seeds c) Irrigation technique to water crops d) Mineral that provides fertility to the soil e) Cradle of agriculture and civilizations f) Exchange and negotiaition of products among different territories 4) Mesopotamia a) Extra production that allows trading b) Agricultural technique to prepare soil for seeds c) Irrigation technique to water crops d) Mineral that provides fertility to the soil e) Cradle of agriculture and civilizations f) Exchange and negotiaition of products among different territories 5) Canal a) Extra production that allows trading b) Agricultural technique to prepare soil for seeds c) Irrigation technique to water crops d) Mineral that provides fertility to the soil e) Cradle of agriculture and civilizations f) Exchange and negotiaition of products among different territories 6) Limo a) Extra production that allows trading b) Agricultural technique to prepare soil for seeds c) Irrigation technique to water crops d) Mineral that provides fertility to the soil e) Cradle of agriculture and civilizations f) Exchange and negotiaition of products among different territories

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