An agronomist is investigating the effect that different types of soil have on the growth and yield of maize. Sweet corn (Zea mays) is planted in loamy soil of varying proportions of sand, silt, and clay. Growth is measured in inches after 15 days, again after 50 days and finally at 100 days. Dry mass of the yield is measured in grams at the same day intervals.

     Four experiments are conducted such that the average amount of sunlight per day is 15 hours at 75° F for the duration of each experiment. All plants where watered at exactly an inch of water per week. All plots where the sweet corn was grown were equally fertilized at about 25 pounds per 1,000 square feet.

     Weed growth and pest attack was mitigated by assiduous attentiveness and insecticide.

Experiment 1

     Sweet corn is planted in loamy soil of sand 33%, silt 33%, and clay 33% after soil was warmed to 50° F.

                                            Table 1

            Height (inches)                           Day                              Yield (g)

            7                                              15                                 0

            84                                             50                                 9

            94                                             100                               45

Experiment 2

     Sweet corn is planted in loamy soil of sand 40%, silt 40%, and clay 20% after soil was warmed to 50° F.

                                            Table 2

            Height (inches)                           Day                              Yield (g)

            8                                              15                                 0

            91                                             50                                 8

            101                                           100                               65

Experiment 3

     Sweet corn is planted in loamy soil of sand 40%, silt 20%, and clay 40% after soil was warmed to 50° F.

                                            Table 3

            Height (inches)                           Day                              Yield (g)

            7                                              15                                 0

            86                                             50                                 8

            96                                             100                               40

Experiment 4

     Sweet corn is planted in loamy soil of sand 20%, silt 40%, and clay 40% after soil was warmed to 50° F.

                                            Table 4

            Height (inches)                           Day                              Yield (g)

            9                                              15                                 0

            90                                             50                                 6

            98                                             100                               45