Question

Problem 16.3 An experiment was conducted to study the effects of irrigation, crop vari- ety, and aerially sprayed pesticide on grain yield. There were two replicates. Within each replicate, three fields were chosen and randomly assigned to be sprayed with one of the pesticides. Each field was then divided into two east west strips; one of these strips was chosen at random to be irrigated, and the other was left unirrigated. Each east-west strip was split into north-south plots, and the two varieties were randomly assigned to plots Rep 1 Rep 2 P P2 P3 P P2 P3 Irrig Var 53.4 54.3 55.9 46.5 57.2 57.4 yes1 53.8 56.3 58.6 51.1 56.9 60.2 yes 2 58.2 60.4 62.4 49.2 61.6 57.2 no 1 59.5 64.5 64.5 51.3 66.8 62.7 no 2 What is the design of this experiment? Analyze the data and report your conclusions. What is the standard error of the estimated difference in aver age yield between pesticide 1 and pesticide 2? irrigation and no irrigation? variety 1 and variety 2?

Answer 1

ne Split Plbt deign Aragze:_ gack repli che or block「s divided Info Pits el shale plob CEc pea ched aurmes to Whole plot). Ne다,Each cohole mote that Since the ohole -plot tedement fn the splrt- and the split-plot- hreahment- Anot confounded, sp Pokfele,仆k better to au )·ttefactor ue are. deign