1. You are interested in the response of two seeding rates of Minica 4 under four application rates of urea. The two seeding rates are 15cm and 30cm between plants. The four fertilizer rates are 0, 30, 60 and 120kg/ha. You will setup a trial using a suitable experimental design with three replicates. (a) Suggest an appropriate experimental design and justify your choice. (b) Provide the treatment design to be used. (c) Suggest an appropriate experimental design. (d) Formulate an appropriate null hypothesis. (e) Draw a diagram illustrating the field layout used in the trial. 2. A researcher recorded seed yield and plant heights for 24 cowpea plants. She wishes to determine whether there is a significant relationship between these attributes. Suggest an appropriate statistical tool for this purpose and justify your choice 3. From a paddy field, 36 plants were randomly selected. Panicle lengths and number of grains per panicle were recorded. The researcher chose to examine the relationship between the two variables using Regression Analysis. Was this an appropriate statistical tool for the purpose? If not, why not and what alternative would you suggest and why?