The table below illustrates a basic economic principle in agriculture. Use it to answer questions 6(a) to 6(a)(iii)
| Quality of fertilizer used (bag | Tomato yield (kg) |
| 0 | 2 |
| 2 | 6 |
| 4 | 9 |
| 6 | 11 |
| 8 | 10 |
| 10 | 5 |
| 12 | 4 |
(a)(i) On the graph sheet provided, plot a graph showing the relationship between fertilizer used and tomato yield. Use a scale of 2 cm to 2 units on the x-axis and 2 cm to 2 units on the y-axis.
(ii) Describe the relationship between the fertilizer used and tomato yield.
(iii) Suggest the most appropriate quantity of fertilizer to be applied on the tomato farm.
(b) State three effects of subsidy withdrawal on agricultural production.
(c) List four print media that could be used to disseminate information about a new variety of maize to farmers.
(d) Name two insect pests each of the following crops: (i) maize; (ii) orange.
Explanation
(a) (i) Graph showing the relationship between fertilizer used and tomato yield. The relationship between fertilizer used and tomato yield
Scale{x-axis 2cm rep. 2 units y-axis 2cm rep. 2 units
(ii) Description of the relationship between fertilizer used and tomato yield As more fertilizer is applied to the tomato farm, total output (yield) first increases sharply but after a point, further addition of fertilizer results in reduction in yield of tomato.
(iii) Most appropriate quantity of fertilizer to be applied on the tomato farm - 6 bags of fertilizer
(b) Effects of subsidy withdrawal on agricultural production -Reduction in agricultural production - High cost of farm produce - Reduction in number of farmers/creates unemployment - Discourages investment in agricultural production - High cost of farm inputs
(c) Print media that could be used to disseminate information about new varieties of maize to farmers - Newspapers -Handbills -Posters -Bulletins -Magazines -Pamphlets -Journals -Periodicals -Banners -Flyers -Billboards -Newsletters -Proceeding -Leaflets
(d) Insect pests of crops
(i) Maize Stem borer - Locust Weevil - Cotton stainer - Aphid - Leaf hopper - Grasshopper - Earworm
(ii) Orange - Thrips - Red - mite - Scale insect - Aphid - Fruit borer - Caterpillar - Mealy bug - Leaf hopper - Fruit fly - Citrus Butterfly - Leaf Miner - Moth