Changes of the energy expense's structure in grains production, in relation to the land's category
2000
Ivanov, D. (Institut po Mekhanizatsiya i Elektrifikatsiya na Selskoto Stopanstvo, Sofia (Bulgaria))
The graphs showing the changes in the energy expense's structure per unit area in relation to the land's category were drawn for producing of wheat and corn at conditions average for the country. The respective empirical ratios were shown too.The graphs showing the changes in the energy expense's per unit basic production in relation to the land's category at conditions average for the country were drawn. The changes of the total energy expense for produsing of wheat may be expressed by a polynom of second power that stands: Eokg=0.1701.k2 - 0.9004.k + 6.8477; MJ/kg and for produsing of corn with the polynom: Eokg= 0.237.k2 - 1.3556.k + 8.8295; MJ/kg. The graphs were drawn and the relations were found for the changes of energy expense expressed in % from the total energy expense in relation to the land's category at conditions average for the country.
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