Knowledge of production and energy expenditure in agriculture is crucial
due to strategic importance which occupies as a producer of energy inputs to other economic
sectors, such as biodiesel produced from oilseed crops, so this study aimed to determine partial
costs of deployment and conduct of corn intercropping agroecosystem with physic nut, under
three different management systems (rainfed, irrigated and fertirrigated with wastewater from
pig farming) in terms of energy and economic experiment carried out in accordance with the
productive system of family farming in the west of Paraná. Such a study is justified due to the
shortage of both energy and economic data of the culture of physic nut under Brazilian
conditions, as well as in intercropping system under technological conditions of the family
farm west of Paraná, and especially environmental issues involved in this study as the reuse of
water and the rational use of nonrenewable energy sources. The experiment was conducted in
accordance with the techniques employed by farmers in the region, from February 2008 to
May 2008 for corn and from February 2008 to November 2009 for the cultivation of physic
nut in Experimental Center of Agricultural Engineering (NEEA), belonging to the State
University of West Paraná (UNIOESTE), campus of Cascavel/PR, in the area of no-tillage.
The itinerary for all technical training systems consisted of: the site preparation (application of
desiccant), mechanized planting of corn, corn plant by hand, production of seedlings of physic
nut, coveamento and transplant seedlings of physic nut, mowing manual, manual application
of insecticide and harvesting of maize, differing only by irrigation and fertirrigation. The final
product was assessed only corn. The technical coefficients, the workload, performance,
identification of the tractor, implements and equipment, their specifications and their
consumption of fuel, lubricants and greases, as well as quantification of manpower used were
derived from primary data and secondary. The methodology consisted of assessing the
productivity, followed by the transformation of energy in physical units and monetary
determination of the "Cultural Partial Efficiency," Energy Efficiency Part "," Production Costs
"and" Economic Efficiency Partial "and" Balance Partial Budget. " Regarding the assessment
of productivity, the treatment led to fertigation of wastewater from hog raising was the one
that had the highest level of productivity, already with respect to energy balance and partial
efficiencies and cultural energy partial treatment led to fertirrigation of wastewater from hog
(ARS) was the one that had better rates. From the economic point of view none of the systems
analyzed to the point proved to be economically viable, but one must take into consideration
that the main crop, jatropha, an annual crop has not yet produced, so it was not evaluated.
Therefore, we conclude that the system fertilized with ARS is the best energy performance,
however, all systems evaluated economically proved unprofitable.
