Neco Model Questions Vol1 2017 Agricultural Science Question 1

A student visits a mixed‑crop field (1 ha) and randomly places five 1 m² quadrats. The numbers of individuals of each plant species recorded in the quadrats are shown in the table. | Quadrat | Species A | Species B | Species C | Species D | Species E | |---------|-----------|-----------|-----------|-----------|-----------| | 1 | 12 | 5 | 0 | 3 | 0 | | 2 | 8 | 7 | 2 | 0 | 1 | | 3 | 10 | 4 | 1 | 2 | 0 | | 4 | 9 | 6 | 3 | 1 | 0 | | 5 | 11 | 5 | 0 | 2 | 2 | Using the data, answer the following: (a) Determine the species richness of the field. (b) Calculate the relative abundance (as a proportion of the total individuals) of each species. (c) Compute Simpson’s Diversity Index (D = 1 – Σp_i²) for the field and briefly interpret the value.