Agricultural Science Neco 2015 Answers Now Available!!!

By 05:00 Thu, 25 Jun 2015 Comments


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Friday 26th June Paper III & II: Objective &

Essay –

Agricultural Science – 10:00am –

12:30pm

AGRIC OBJ TYPE A:

1-ACEDBDDBAB

10-DBBDBABCEA

21-DAEEBACDBB

31-CBDAADDEBC

41-AECDBDBCBA

51-BAEEECBAEC

AGRIC THEORY

1 a )

- they assist in rural development by providing social

amenities

- they carry out research to improve new crop varieties

- they fund research for better farming method and also

develop farm implement

- they helps to control weeds, pests&diseases organism

by providing necessary chemical

1 b )

- IMPLEMENT&MACHINERY : science and technology has

aided the development of implements&machinery which

have replaced the olds tools

- PROVISIONS OF STORAGE FACILITIES : they help to

develop storage facilities for preservation of harvested

product.

- DEVELOPMENT OF FARM MANAGEMENT SYSTEM : this

also develop the farm system with the aid of science and

technology

- ANIMAL NUTRITION : this developed feeds, new

formulated to meet the nutrition demand of animal

1 c)

- Replacing of trees

- Crop rotation

- Bush fallowing

- Cover cropping

1 d )

Farm surveying is the measurement of land made on

farm , such measurement by tables , plans and done for

specific purpose .

1 e)

- it ensure the passage of grains and chaff through diff

nozzles

- it cleans the grain by separating them from chaff

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3 a )

Flooding : It consist of opening a water channel in a plot or

field so that water can flow freely in all directions and

cover the surface of the land in a continuous sheet .

- Basin irrigation : This method is suitable for orchids and

other high value crops where the size of the plot to be

irrigated is very small.

- Furrow method : Water is allowed to flow in furrow opened

in crop rows . It is suitable for sloppy lands where the

furrows are made along contours .

3 b )

i) . Soil Ph : The relative concentration of the hydrogen irons

and or hydroxyl irons may either increase or decrease

nutrient availability.

ii) . Leaching : This encourages the draining of mineral

salts from the topsoil to subsoil thereby depriving plants of

such nutrients .

iii) . Crop Removal : This may be in form of clean clearing ,

deforestation or cutting down of harvested crops which

lead to loss of nutrients in the soil .

iv ) . Burning: This kills soil organisms, destroys the texture

and structure of the soil and finally reduces plant

nutrients .

v ) . Erosion : This helps in washing away of soil nutrients

from one place to another, and may occur under the

influence of heavy rain or wind storm .

3 c)

- Evaporation : is water loss from the soil or from water

spray equipment . It occurs on hot , sunny and windy days .

- Transpiration : is water loss from leaf tissue . You can

reduce it by allowing plants to wilt in the afternoon sun .

- Percolation: is the downward movement of water through

the soil .

3 d )

percentage of water present in the soil = Mass of water /

Mass of fresh soil × 100 / 1

Mass of empty evaporating dish = 0 . 2 g

Mass of dish + fresh soil = 0 . 265 g

Mass of fresh soil only = ( 0 . 265 – 0 . 2 ) G

Mass of dish + dried soil = 0 . 25 g

Mass of dried soil only = ( 0 . 25 – 0 . 2 ) g = 0 . 05 g

Mass of water driven off = ( 0 . 065 - 0 . 05 ) g = 0 . 015 g

% of water by mass = 0 .015 / 0 .065 × 100 / 1

= 23 . 08 %

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4a )

- AMMONIFICATION : the process involving the formation

of ammonium compound from dead and decaying plants&

animals and their waste product of life urine and faeces

- NUTRIFICATION: Is the process that involve conversation

of ammonium compound first nitrite by nitrifying bacteria

called nitrosomonas , the nitrite are converted by oxidation

of nitrates by another bacterium called nitrobacter

4 b )

- topography

- population growth

4 c)

[ ORGANIC MANURE]

- it refers to decayed plant&animal product

- it conserve moisture&prevent evaporation from soil .

[ INORGANIC MANURE]

- it refers to non decayed plant&animal

- it does not conserve moisture

4 d )

- it does not support leaching hence , contain plant

nutrition

- the particles are sticky&mouldy when wet

- percolation in clay soil is low but capilarity is high

- it support water

- logging&erosion

4 e)

[ INTRUSIVE IGNEOUS ROCK ]

- are formed when motion magma cool&solidifies slowly

before it get the surface of the earth to form large crystal

Examples are:

- granites

[ EXTRUSIVE IGNEOUS ROCK ]

- are formed when molten magma cool&solidifies rapidly

on getting to the surface of the earth to form small crystal

Examples are :

- basalt

4 f)

- sprinkler irrigation

- drip irrigation

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5 a )

i) pasture is a piece of land or fuld containing grass for

sheep , goats and cattle to eat as it grows

ii) paddocking : is where animals are plugged in an

enclosed area so that they can be grase and trained

5 b )

i) it increase the farmer income

ii) it allows increase in the market value of the farm animal

5 c)

i) it increases soil nutrients

ii) it control weed

iii) more farmland can be under forest cause

iv ) there is reduction in the cost of establishment a forest

reserve .

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6 a ) This involves the importation of introduction or some

varieties of crop with desirable characteristics into area

where they are not existed before.

6 b )

- it lead to loos of organic matter

- it may lead to desert enchroachment as sand particle

are more likely to drop in area without trees

- it destroy micro - climate&warm up the environment

- it reduce the amount of rainfall in the area.

6 c)

- Remove and burn infected plant

- practice crop rotation

- plant diseases - resistant varieties of crop

- spray plant protection chemical such as fungicide&

nematicide

6 d )

- LAND PREPARATION : this is done manually using

cutlass&hoe to make ridges or mechanically by

ploughing .

- CLIMATIC REQUIREMENT : it required a temperature of

over 20 degree C, 75 cm to 120 cm of rainfall for upland

rice and over 250 cm for swamp

- CULTURAL PRACTISE :

( i ) Weeding :- it is done to ensure rapid growth of rice

( ii ) Fertilizer application: apply 150 kg or 3 bag of N. P . K

fertilizer per hectare at planting by broadcasting .

- ONE MAJOR DISEASES : Rice smut

- ONE MAJOR PEST: Rice weevils

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