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Agricultural Science Neco 2015 Answers Now Available!!!




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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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