Correct Answer: C. having a large land area for cultivation

Correct Answer: A. I

Correct Answer: D. forage yield will be high

Correct Answer: A. high feed intake

Explanation

(a) Edaphic factors that influence crop growth

-Soil pH Soil texture

-Soil structure

-Soil colour

-Soil temperature

-Soil consistency

-Soil type

-Topography

(b)(i)Gravitational water: This is the excess water above field capacity drains out of the soil under the influence of gravity. This type of water is unavailable for plant use OR This is the water held in soil macro pores that drains out under the influences of gravity This type is unavailable for plant use

(ii) Hygroscopic water : This is the water present in an air-dry soil held tightly by soil solids. This type of water cannot be removed by evaporation and roots of higher plants. It is water unavailable for plant use crops

(c)Deficiency symptoms of nutrient elements in Crops

(i) Nitrogen

- Yellowing or leaves

- Stunted growth

- Premature dropping of leave

- Poor formation of fruits and flowers

(ii) Phosphorus

- Purplish coloured leaves

- Scorched leaves

- Stunted growth with few branches

- Lodging of plants due to Poor root development

- Inhibition of flowering, fruit and seed formation

(iii) Potassium

- Mottling, curling and spotting of leaves

- Streaking of older leaves

- Delayed maturity

- Weak and slender stems

- Premature loss of margins

- Browning of leaf margins

(d) Benefits derived from draining farmlands

- Facilitates planting

- Makes tillage operations easy

- Improves soil aeration

- Improves soil temperature

- Allows for cultural practices on the land

- Favours the growth of aerobic soil organisms

- Means of reclaiming land for agricultural purposes/makes more land available for

cultivation

- Helps to flush excess salts from soils

- Enhances seed germination

- Increases the depth of the root zone in the soil.

- Decomposition of plant and animal residues is increased

- Improves soil structure

- Increases soil productivity

Explanation

(a) The law of demand states that the lower the price, the more or higher the quantity of agricultural produce that will be demanded or the higher the price, the lower the quantity of produce that will be demanded.

(b) Six basic assumptions as related to agricultural products are that:

(i) No very close substitutes for commodity exist.

(ii) There is no change in tastes and preference of the consumers.

(iii) The amount of money or income of the consumers remain constant.

(iv) There is no change in the quality of products.

(v) The habits of consumers remain unchanged.

(vi) The prices of other goods remain constant.

Example of a Demand schedule

Explanation

(a) Four methods of harvesting fish are: (i) The use of Nets: This involves the use of various types of nets like gill net, trawl net which have been woven into various sizes and thickness and are thrown into water for fish haulage. (ii) Use of Traps: These are gears made from ropes woven into various models of enclosures for capturing fishes. (iii) Draining of ponds: Draining off pond water and using net to catch large fish. (iv) The use of Hooks and Line: The use of hooks which are baited and tied to strings and set across the water to catch fish.

(b) Four fishery regulations are: (i) No vessel (except canoes) shall fish within the first two nautical miles of the waters of the Nigerian continental shelf (ii) Catch quota is a form of control in which a fisherman is allowed to catch a specific quantity or regulating the number of fishermen by issuing them fishing permits at a specified amount. (iii) The use of any explosive substances is prohibited. (iv) The use of noxious or poisonous materials is prohibited as this can kill virtually all categories of fishes in the water.

Correct Answer: B. ley farming

Correct Answer: D. granite

Correct Answer: D. MAGNETIC ATTRACTION