Nassiri, Seyed Mehdi; Singh, Surendra - In: Applied Energy 86 (2009) 7-8, pp. 1320-1325
The energy-ratio (output energy to input energy ratio) and specific energy (input energy to yield ratio denoted by MJ/kg) of farmers in crop production systems are indices, which can define the efficiency and performance of farms. Technical efficiency (weighted output energy to weighted input...