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<=Diploma in Agriculture module 1 : Principles of crop production I and Soil science past paper November 2022
Explain three factors that influence cation adsorption on colloidal complex.
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Questions List:
1. Describe nematode infestation in crops under the following: (i) damage and symptoms; (ii) control.
2. Define the term 'apomixis
3. Explain four types of apomixis
4. Highlight three advantages and three disadvantages of small scale farming system.
5. Outline the principles of crop rotation.
6. Explain zero-tillage under the following; (i) meaning: (ii) benefits
7. Describe layering method of crop propagation under the following: (i) meaning: (ii) importance.
8. Describe alley cropping system of agroforestry
9. Maize is planted at a spacing of 75 cm by 25 cm in one hectare of land. Given the following information: 100 seeds of maize=37.5 g Germination percentage = 85% One seed is planted per hole. Determine the seed rate in kilogrammes per hectare
10. Highlight six characteristics of agricultural produce
11. ) With reference to seed quality, highlight characteristics of the following: (i) physical purity: (ii) physiological quality.
12. Highlight the role of Kenya Plant Health Inspectorate Service (KEPHIS) in seed certification.
13. The fertilizer rate for planting a particular crop is given as 90 kg P:Os/ha. Determine: (i) the mount of DAP (18:46:0) fertilizer applied in one acre of land during planting. (ii) the amount of nitrogen that is contained in DAP fertilizer applied in one acre of land during planting.
14. Outline the procedure of preparing silage using the trench silo
15. Highlight the properties of the following soils: (i) sandy soils; (ii) clayey soils.
16. A soil sample weighing 800 g contains 180 g of moisture when 51% of the pore spaces are full. Given that: Particle density = 2.65 g/cm3 1 cm3 of water = 1g Determine the porosity of the soil sample.
17. Describe biological weathering of rocks
18. Differentiate between new comprehensive system and soil world map system of soil classification
19. The following equations shows one of the biochemical processes in soil. #(NH_4)_2SO_4+0_2# (i) Complete and balance the equation Explain the process.
20. Explain percent base saturation under the following: (i) moaning: (ii) significance.
21. Explain three factors that influence cation adsorption on colloidal complex.
22. Define the term ‘biochemical sedimentary rocks’
23. State six properties of sedimentary rocks
1. Describe nematode infestation in crops under the following: (i) damage and symptoms; (ii) control.
2. Define the term 'apomixis
3. Explain four types of apomixis
4. Highlight three advantages and three disadvantages of small scale farming system.
5. Outline the principles of crop rotation.
6. Explain zero-tillage under the following; (i) meaning: (ii) benefits
7. Describe layering method of crop propagation under the following: (i) meaning: (ii) importance.
8. Describe alley cropping system of agroforestry
9. Maize is planted at a spacing of 75 cm by 25 cm in one hectare of land. Given the following information: 100 seeds of maize=37.5 g Germination percentage = 85% One seed is planted per hole. Determine the seed rate in kilogrammes per hectare
10. Highlight six characteristics of agricultural produce
11. ) With reference to seed quality, highlight characteristics of the following: (i) physical purity: (ii) physiological quality.
12. Highlight the role of Kenya Plant Health Inspectorate Service (KEPHIS) in seed certification.
13. The fertilizer rate for planting a particular crop is given as 90 kg P:Os/ha. Determine: (i) the mount of DAP (18:46:0) fertilizer applied in one acre of land during planting. (ii) the amount of nitrogen that is contained in DAP fertilizer applied in one acre of land during planting.
14. Outline the procedure of preparing silage using the trench silo
15. Highlight the properties of the following soils: (i) sandy soils; (ii) clayey soils.
16. A soil sample weighing 800 g contains 180 g of moisture when 51% of the pore spaces are full. Given that: Particle density = 2.65 g/cm3 1 cm3 of water = 1g Determine the porosity of the soil sample.
17. Describe biological weathering of rocks
18. Differentiate between new comprehensive system and soil world map system of soil classification
19. The following equations shows one of the biochemical processes in soil. #(NH_4)_2SO_4+0_2# (i) Complete and balance the equation Explain the process.
20. Explain percent base saturation under the following: (i) moaning: (ii) significance.
21. Explain three factors that influence cation adsorption on colloidal complex.
22. Define the term ‘biochemical sedimentary rocks’
23. State six properties of sedimentary rocks
