S5 Agric P1 Holiday Work 2020 Caltec S.4

S.5 HOLIDAY REVISION WORK 2020 P515/1 – PRINCIPLES & PRACTICES OF AGRICULTURE Paper One TIME: 2 Hours INSTRUCTIONS: Answer all questions. Untidy work will lead to loss of marks. SECTION A When a change in price of a commodity produce only a slight change in demand, the demand for a commodity is elastic B. stable C. rigid D. inelastic An epithelium tissue lining the walls of the alveoli and capillaries is columnar B. cuboidal C. stratified D. squaremous Which of the following factors may make crop rotation inefficient in controlling crop diseases? Loss of soil fertility Absence of resistant crop variety Late planting of crops Presence of pathogen spores from previous crop Sub-soiling is carried out in order to; mix the soil C. discourage soil erosion encourage soil drainage D. encourage soil erosion Which one of the following factors does not cause a change in gene frequencies in a population? Mutation B. Migration C. Genetic drift D. Epitasis Organic matter content contains the following except; Carbohydrates B. Fats C. Lignin D. Gravel A soil profile with A and C horizons only Lacks organic matter C. is a young soil Lacks the present maternal D. has been eroded In mitosis DNA replication and chromosome duplication occur during anaphase B. Metaphase C. interphone D. prophase Which of the following quickens rooting in cutting? Ethylene dichromide C. Phosphate fertilizers Indole Acetic Acid D. Amino acid The yellowing of leaves between their veins is a symptom of Water logging C. magnesium deficiency Nitrogen deficiency D. high soil pH Which of the following rainfall characteristic is most critical for the growing of a perennial crop? Total amount per year B. Distribution C. Reliability D. Intensity The term soil reaction refers to; mineralization of elements in organic matter Antagonism between soil nutrients. fixation of nitrogen in …