Part I – Field Crops
(35 marks)AROID CROPS(10 marks)1. Discuss three (3) management practices that a farmer can use to increase the number of suckers on acultivar of Colocasia esculenta (L) Schott in order to produce more planting materials.3 marks2.
Compare Xanthosomaand Alocasiain terms of the following:a. Tolerance to droughtb. Ability to yield well on hard, stony soilsc.Time to maturityd. Main edible part(s)4 marks3. Discuss the cultivation of Cyrtosperma under the following broad topics:
a.Production systemb.Land preparationc.Nutrient supply3 marksTUBER CROPS(15 marks)4. Discuss how and why
Manihot esculenta yields well under marginal soil fertility and soil moistureconditions.2 marks5. Discuss the development physiology (growth stages) of
Dioscorea spp.5 marks6. Outline some cultural control methods for dieback or anthracnose disease of yams.
2 marks7. Discuss the production of
Ipomea batatas under the following topics:a. Hardening of vine cuttingsb. Curing and storage2 marks8. Why are sweet potato yields lower in the rainy season than in the dry season?2 marks9. Why is ‘hilling up’ important in sweet potato cultivation?
2 marksPage 3of 5
CEREALS(6 marks)10. Briefly describe the basis of the classification system for
Zea mayscultivars 1 mark11. How would you identify when a maize cob reaches physiological maturity.
1 mark12. Discuss land preparation required for wetland/swamp paddy production.
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Araceae, Taro, Black pepper, Faculty of Business and Economics