Agric – pract- Ans

( 2 a )
G – PH 7 ( neutral)
H – 1 – 4 ( acidic )
I – PH – 8 – 14( alkaline OR basic)

( 2 b )
Specimen G :
When G is added to water sample in a glass beaker and stored with blue and red litmus paper , No colour change was observed, showing neutral.
Specimen H :
When H is added to a water sample in a beaker and stirred and tested with blue and red litmus paper . It changes blue litmus paper to red showing that it is acidic .
Specimen I :
When I is added to a water sample in a beaker and stirred/ tested with litmus papers . It changes the red litmus paper to blue showing that it is basic or alkaline .

( 2 ci )
If the PH is 45 it shows that it is slightly acidic / acidic

( 2 cii )
( i ) It destroys the root of plants .
( ii) It prevents the uptake of food from the root system .
( iii ) It prevents the normal growth of plants except plants like tomatoes .

( 2 ciii )
( i ) Washing away of soil nutrients by erosion
( ii) Planting operations like Monocropping
( iii ) Excessive use of land of a long period of time

( 1 a )
Specimen A
– It is used for falling of trees
– It is used for cutting the roots during stumping .
– It is used for cutting logs of woods into smaller pieces
Specimen B
– It is used for lifting and tuning the soil
– It is used for levelling of the soil
– It is used for digging holes during transplanting
Specimen D
– It is used for transplanting of seedling
– It is used for applying manure after and before planting
– It is used for nursery operation / practice
Specimen F
– It is used for pulverizing the soil
– it is used for aerating the soil
– It is used for transplanting seedlings

( 1 b )
– The Metal part should be sharpened when blunt
– The metal part should be oiled or greased to prevent rusty
– The wooden part should be stored or kept in a place that termite cannot eat it
– Store in a cool and dry place

3 a )
J is weavil
K is beetle
L is mosaic disease
M is fruit rot

3 b )
i ) It reduce the quality and quantity of farm products
ii) It reduces the market value of farm products
iii ) It aids decomposition and decay of plants

3 c )
SPECIMEN J
( i ) by the use of chemicals
( ii) by the use of pesticides
( iii ) through and picking
SPECIMEN K
( i ) through the use of pesticides
( ii) by handpicking
( iii ) by the use of chemicals
SPECIMEN L
( i ) through the practise of crop rotation
( ii) by using fungcidese
SPECIMENS M
( i ) through the use of rodenticide
( ii) by setting traos for the rodents

( 4 a )
( i ) Cattle
( ii) Sheep
( iii ) Goat

( 4 b )
SPECIMEN N
– it sucks the blood of its host
– it reduces the size of its host
– it reduces the market valve of its host
– It kills its host
SPECIMEN O
– It kills it ‘ s host
– it reduces the quality of it ‘ s host
– it causes anaemia to its host
– it sucks the blood of it ‘ s host

4 c )
– By proper sanitation measures
– By handpicking
– By dipping the infected host in chemicals
– By using insecticides
– By isolation of infected animals
– By quarantine WRONG ANSWERS