Truck and shovel are the most common raw material transportation system used in the cement quarry operations. One of the major challenges associated with the cement quarry operations is the efficient allocation of truck and shovel to the mining faces. In order to minimize the truck and shovel operating cost, subject to quantity and quality constraints, the mixed integer linear programing (MILP)...

This study was aimed at evaluating the effect of crop rotation and various tillage systems onthe chemical and biological properties of soil in the years 2013-2015. The first order factorincluded cropping systems: a) crop rotation (pea – winter wheat – spring wheat) and b)monoculture of winter wheat, whereas the second order factor were tillage systems:1) conventional (CT), 2) reduced (RT) and 3...

the increasing needs for energy, its high price and its environmental impact on greenhouse gases emission and limited energy resources due to increased research on energy balance in crop production systems. the objective of this research was to compare seedbed preparation and sowing methods in wheat production in kordkoy region with respect to energy use and efficiency. fifteen wheat fields wer...

In English, many words can be used flexibly to label artifacts, as nouns, or functional uses of those artifacts, as verbs: We can shovel snow with a shovel and comb our hair with a comb. Here, we examine whether young children form generalizations about flexibility from early in life and use such generalizations to predict new word meanings. When children learn a new word for an artifact, do th...

For the peanut combine harvester excavation process resistance, poor soil crushing effect and reliability of problem, shovel optimization needs improvement. Firstly, a mechanical model resistance was established to investigate key factors affecting degree shovel. Next, design main parameters done determine range values EDEM software used simulate analyse explore influence law on resistance. Imp...

field experiments were conducted in amirkabir sugarcane agro-industry (khuzestan province, iran) farms to evaluate the efficacy of integrated chemical and mechanical methods in controlling weeds. experiments were carried out in a split plot-randomized complete blocks design with four replications. the main plot consisted of four mechanical treatments, namely: hilling up, sweep cultivator, disc ...