Agriculture Paper 3, WASSCE (SC), 2022

Question 3

     

    (a)        State the botanical names of each of the crops from which specimens I, J, K and L
    were obtained.                                                                                                [4 marks]


    (b)        Classify each of specimens I, J, K and L according to their uses.                [4 marks]


    (c)        Outline the steps involved in the processing of specimen I to obtain
    vegetable oil.                                                                                                   [4 marks]


    (d)       List three diseases of the crop from which specimen K was obtained.         [3 marks]

Observation

     

    Candidates’ performance in Question 3 was below average due to
    (a)        failure of candidates to adhere to the scientific convention of writing
    botanical names and wrong spellings;
    (b)        inadequate knowledge of classification of crops based on their uses;
    (c)        failure to sequentially outline the steps involved in processing groundnut
    into vegetable oil;
    (d)       lack of knowledge of diseases of oil palm.

    The expected answers include:


    3.   (a)   Botanical names of crops from which specimens I (Groundnut seeds), J (Cotton lint) and
             K (Oil palm fruit) and L (Rubber latex) were obtained

    Specimen I   (Groundnut)    -  Arachis hypogea
    Specimen J   (Cotton)          -  Gossypium spp
    Specimen K  (Oil palm)     Elaeis guineensis
    Specimen L  (Rubber)         - Hevea brasiliensis    

                        

                 (b)   Classification of specimens I (Groundnut seeds), J (Cotton lint), K (Oil palm fruit) and
                        L (Rubber latex) according to their uses

                           Specimen I (Groundnut seeds) -  Legume/pulse/grain legume/Oil crop
                           Specimen J (Cotton lint)          -  Fibre crop/Oil crop
                           Specimen K (Oil palm fruit)    -  Oil crop
                           Specimen L (Rubber latex)      -  Latex crop  

       
    (c)   Steps involved in the processing of specimen I (Groundnut seeds) to obtain vegetable oil
    -    Drying                                   
    -    Threshing /dehulling/picking
    -    Winnowing  
    -    Shelling/decortication
    -    Winnowing
    -    Roasting
    -    Milling/pressing/pounding
    -    Oil extraction/Filtration

    (d)  Diseases of the crop from which specimen K (Oil palm fruit) was obtained


      -    Anthracnose              
    -    Leaf spot/Freckle 
    -    Ganoderma disease/Galadema
    -    Algae spot
    -    Blast
    -    Vascular wilt
    -    Brown Germ