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Agriculture · Karatasi 3 · 2025

5 maswali

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Maswali (5)

Sehemu A

1. 0 alamas

You are provided with specimens’ C and D, source of water, graduated hand sprayer, measuring cylinders and a stop watch. Perform the following procedures then answer the questions that follow: Procedures (i) Use water to make the plants grown on specimen C wet. (ii) Pour 1,000 cm3 of water into a graduated hand sprayer. (iii) By using 10 cm3 measuring cylinder, measure 10 cm3 of specimen D. (iv) Put 10 cm3 of specimen D into a graduated hand sprayer containing 1,000 cm3 of water. (v) Shake the mixture for about 10 seconds. (vi) Spray the mixture on the plants grown on specimen C until all plant parts become covered. (vii) Observe the results of the plants grown on specimen C after 20 minutes.

(a) What is the aim of the experiment? 0 alama
(b) What have you observed to plants grown on specimen C after 20 minutes? 0 alama
(c) What fault has been noted from your observations in part (b)? Give the cause of the fault. 0 alama
(d) If the quantity of specimen D used can spray an area of 1000 m2, calculate the amount of the specimen D a farmer should buy in order to spray his 10 hectare of maize field. 0 alama
(e) Advise the farmer on the proper ways of handling and using specimen D. Give seven points. 0 alama
(f) Account for the three modes of action of specimen D. 0 alama

Boresha ili kuona majibu ya mfano.

Sehemu B

2. 0 alamas

You are provided with specimens T and U, X and Y, two syringes, two test tubes and two groves. Perform the following procedures then answer the questions that follow: Procedures (i) Wear the gloves. (ii) By using forceps, hold and place specimen T into the test tube labeled 1. (iii) Measure 5 cm3 of specimen X by using syringe. (iv) Release specimen X into the test tube labeled 1 drop wise until you observe changes to the specimen T. (v) Repeat the same procedures to specimen U in a test tube labeled 2 by using Y.

(a) What is the aim of the experiment? 0 alama
(b) What have you noticed from the experiment? 0 alama
(c) From the results of experiment, which specimen would you recommend for use between X and Y? 0 alama
(d) Briefly explain the stages of development from the egg to adult that specimens T and U can pass if the farmer is keeping only one cattle. 0 alama
(e) The farmer was keeping a large number of cattle which were severely infected with various species of specimens T and U. Suggest the possible disease that may occur to the farmer’s heard if the recommended specimen in part (c) is not used. 0 alama
(f) Briefly explain three methods of applying specimen X on animals. 0 alama

Boresha ili kuona majibu ya mfano.

3. 0 alamas

You are provided with specimen M, knapsack sprayer and a wall clock. Perform the following procedures then answer the questions that follow: Procedures (i) Fill a knapsack sprayer with specimen M. (ii) Take a knapsack sprayer containing specimen M from its position and put it on your back and adjust the shoulder straps until you feel comfortable. (iii) Pump the operating handle until you notice a difference and direct the delivery tube into the water sink. (iv) Stop pumping after noticing the difference. (v) Grip and press on-off lever for 30 seconds (a half a minute). (vi) Observe the pattern of mist of liquid coming out for 30 seconds (a half minute). (vii) Remove a sprayer from your back and place it in its original position.

(a) What difference was noticed when pumping the operating handle? 0 alama
(b) Briefly explain the implication of the difference noticed in part (a). 0 alama
(c) Why is the on-off lever not pressed before and during pumping the operating handle? 0 alama
(d) Briefly describe the pattern of liquid observed coming out. 0 alama
(e) Which part of the sprayer is responsible for making liquid pattern in part (d)? 0 alama
(f) Proper working of the part named in (e) is essential for efficient functioning of sprayer. How would you maintain the part? 0 alama
(g) What are the factors to consider when carrying out procedure (i) – (iii) in the field of crops for controlling pests? Give five points. 0 alama

Boresha ili kuona majibu ya mfano.

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