Assessment of energy use pattern for tomato production in Iran: A case study from the Marand region

abonos aceite diesel agricultural chemicals agua analyse input output azote consumo de energia cosecha crop yield cultivation cultivo diesel oil eau energy consumption engrais ensemencement exploitation agricole moyenne explotaciones agrarias grandes farm inputs farmyard manure fertilisation fertilizer application fertilizers fosfatos fumier grande exploitation agricole harvesting input output analysis insumos agricolas iran islamic republic irrigation labour large farms lycopersicon esculentum mathematical models medium size farms moyen de production agricole nitrogen petite exploitation agricole phosphate phosphates potasio potassium pratique culturale produit agrochimique rendement des cultures rendimiento de cultivos renewable energy riego seed semence semillas siembra small farms sowing spraying tomate tomatoes trabajo transport transporte travail water weeding