Alfalfa Harvesting System Essays

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3. Results and discussion
3.1. Analysis of input-output energy use in different alfalfa harvesting systems
Table 3 shows the inputs and output in different alfalfa harvesting systems. The results indicated diesel fuel and human labor for alfalfa silage production was lower than alfalfa hay production, but the machinery was higher. As it can be seen in table 3 output was determined as 6865.28 Kg ha-1 for alfalfa silage production which more than alfalfa hay production (5721.07 Kg ha-1). Differences in alfalfa yields were related to different cutting in different harvesting systems.
Table 4 displays the energy values for inputs and output in different alfalfa harvesting systems. The total energy requirements for producing the alfalfa hay and alfalfa silage crops in the year were 25922.94 MJ ha-1 and 26821.59 MJ ha-1, respectively. Tsatsarelis and Koundouras [2] calculated the energy inputs for alfalfa whole production life (4 years) in Greece as 116 GJ ha-1, and Mobtaker et al. [20] calculated the energy inputs for alfalfa whole production life (7 years) in Iran as 810.57 GJ ha-1
Among the different energy sources, electricity for irrigation was the highest energy consumer in different alfalfa harvesting systems. Having deep wells in the region and not using modern efficient irrigation methods are among the reasons of high consumption of electrical energy in the studied region. In order to reduce the electricity consumption, using of modern methods of irrigation with high…