S.2 Agric Holiday Work 2020 Caltec S.2

NAME…………………………………………………………SIGN…….. SENIOR TWO HOLIDAY WORK 2020 EXAMINATIONS AGRICULTURE TIME: 1 HOUR 30 MINUTES INSTRUCTIONS: attempt all questions. 1. Which of the following is not a characteristic of sandy soils? A. Rough texture. B. Good aeration. C. Poor drainage. D. Low pH. 2. Which of the following is an example of mechanical erosion control? A. Terracing. B. Deep ploughing. C. Minimum tillage. D. Crop rotation. 3. Soil erosion highly influenced by man is called A. accelerated erosion. B. geological erosion. C. natural erosion. D. mulching. 4. Volatilization in crop means A. lose of nutrient. B. unavailability of nutrients. C. evaporation of nutrients. D. Excess nutrients. 5. Soil temperature is important except A. controls moisture. B. affects aeration. C. affects mechanical activities. D. cause loss of water. 6. (a) Give six importance of nitrogen to crops (6 marks) ………………………………………………………………………. ………………………………………………………………………. ………………………………………………………………………. ………………………………………………………………………. ………………………………………………………………………. ………………………………………………………………………. (b) Mention five deficiency symptoms of nitrogen in crops. (5 marks) ………………………………………………………………………. ………………………………………………………………………. ………………………………………………………………………. ………………………………………………………………………. ………………………………………………………………………. 7.(a) Mention five importance of irrigation in crop production. (5 marks) ……………………………………………………………………….. ………………………………………………………………….......... ……………………………………………………………………….. ……………………………………………………………………….. ……………………………………………………………………….. (b) Give five factors that influence the choice of the irrigation method. (5 marks) ………………………………………………………………………. ………………………………………………………………………. ……………………………………………………………………….. ……………………………………………………………………….. ……………………………………………………………………….. (c) Outline five causes of soil erosion. (5 marks) ………………………………………………………………………. ………………………………………………………………………. ………………………………………………………………………. ………………………………………………………………………. ………………………………………………………………………. 8.(a) Mention five characteristics of a good fertilizer. (5 marks) ……………………………………………………………………..... ………………………………………………………………………. ………………………………………………………………………. ………………………………………………………………………. ………………………………………………………………………. (b) Mention five factors that affect response to fertilizers by crops. (5marks) ……………………………………………………………………… ……………………………………………………………………… ……………………………………………………………………… ……………………………………………………………………… ……………………………………………………………………… (c) A farmer applied 210 kg of NPK fertilizer which contained the elements in the ratio 25:5:5 per hectare of a tea plantation. Calculate the amount of each nutrient that the farmer applied per hectare. (8 marks) ……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………………………………………… (d) Determine the percentage of each element in the fertilizer. (8 marks) ……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………… ……………………………………………………………………………… (e) Mention five aims of soil sampling. …