Table 2: Energy equivalent coefficients for various sources of energy in faba bean production.

Particulars Unit Energy Equivalent
(MJ unit−1)
Reference Remarks
A. Inputs
1. Human labor h 1.96 [12, 52, 53] Human Male (1.78 MJ as direct and 0.18 MJ as indirect)
2. Machinery h 62.70 [54, 55] Distributing the energy used in manufacture over the lifetime of the machinery
3. Diesel fuel L 56.31 [18, 54, 56] The production of one liter of petroleum-derived diesel Including lubricant
4. Phosphorus (P2O5) fertilizer kg 12.44 [26, 52] Energy required for manufacture of kg P2O5 as fertilizer
5. Herbicide L 238.00 [47, 54] Energy required for manufacture of 1 liter of herbicide; Requires dilution at the time of application
6. Seeds (faba bean) kg 21.00 [47] Dry weight as an output of crop production system
B. Outputs
1. Dry grain kg 20.00 [12, 47] Gross energy in faba bean grain (dry weight)
2. Faba bean straw kg 17.65 - Calculated value from Feedipedia [23] and Hadjipanayiotou et al. [24] based on the amount of energy released as heat (gross energy) in faba bean straw (dry matter)