We need extra runs to design two-level factorial experiments in blocks of size two to estimate all the available effects, as is possible in experiments without blocking. The number of runs suggested is (n − p)2n−p for 2n−p fractional factorial experiments. In designing such an experiment, two issues need to be considered. First, the precision of estimates is usually different because different ...

an experiment was conducted to study the effects of enzyme and phytogenic product (thymol+carvacrol) on the ileal microbial population and jejuna and ileal histomorphology of broilers fed wheat based diet. the experiment was conducted as a 2 × 3 factorial arrangement with 2 levels of enzyme endofeed w (0 and 0.05%) and 3 levels of next enhance 150® (0, 100 and 200 mg/kg). each of the 6 dietary ...

in order to investigating the effects of planting date and harvest time on the quality performance of pear millet, an experiment was conducted in agriculture research station of gorgan in a randomized complete block design with four replications and factorial arrangement. this experiment included five planting dates (may 5th, may 25th, june 14th ,july 4th, july 24th) and three harvest times (90...

an experiment was conducted to determine the dietary digestible lysine requirement of male and female broiler chickens (arian) during the period from 6 to 21 days post-hatching. an amino acid-fortified basal diet containing corn and soybean meal as intact protein sources provided 20 % cp, and 3200 kcal amen / kg. in this experiment 150 male and 150 female chicks were allocated on the basis of b...

     Drought stress is one of the most important factors affecting plant growth. Plant growth under drought stress may be enhanced by the application of microbial inoculation including plant growth promoting rhizobacteria. This research was conducted as a factorial experiment in a completely randomized design. The first factor included the bio-fertilizer (A. vinelandii (A)), P. agglomerans+ P. ...

Previous experimental research demonstrates that inefficient replenishment decision making in the supply chain can be caused by specific judgment and decision biases. Based on the literature we use controlled experiments involving both student subjects and supply chain managers to test debiasing interventions that provide declarative knowledge, which is theorized to enhance the acquisition of p...

abstract extensive application of atrazine and its toxicity in environmental has attracted researcher attention for finding new degradation methods to this organic pollutant. biodegradation is one of most effective methods for removing atrazine. due to the importance of atrazine herbicide as an organic pollutant, a design carried out at factorial experiment in completely randomized design with ...