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Marking Guide Agriculture

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PDF 172.34 KB 5 pages Jul 23, 2026

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Subject Agriculture
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1. (a) You are provided with soil samples A and B. Wet a small sample of A and rub it between the index figure and thumb and describe your observation. Repeat the same procedure with soil sample B. (02 marks) A: Observation : Its stickye and forms Ribbon e B: Observation: Its grittye / rough and does not form ribbone. (b) Pick a small sample of A and rub it between the thumb and index figure. Describe the feeling. Repeat the same procedure with sample B. (02 marks) A: Feels smooth B: Feels gritty / coarse / rough (c) To 40cm3 of A in a dry measuring cylinder, add 40cm3 of clean water and stir the mixture thoroughly until the two are fully mixed. Allow the mixture to settle and record the volume of the mixture. Repeat the same procedure with sample B and record your results in the table below. (03 marks) Sample Volume of soil used Volume of water used Expected volume of mixture Actual volume of mixture A 40cm3 40cm3 40 + 40e = 80cm3 60 – 64cm3 = 1 ½ mark B 40cm3 40cm3 40 = 40 = 80cm3 66 – 69cm3 = 1 ½ mark (i) Calculate; Volume of air in A and B. (02 marks) A: 80cm3 – 60, 61, 62, 63, 64 e = 20, 19, 18, 17, 16cm3 e = 1 B: 80cm3 – 66, 67,68, 69 e = 14, 13, 12, 11 cm3e = 1 (ii) State the factors that affect the amount of air in soil. (02marks) - Soil texture / size of soil particles - Soil structure - Soil drainage 1 ‘O’ LEVEL MARKING GUIDE AGRICULTURE Paper 2 - Number of pore spaces Any 2 points 1 mark @ = 2 marks (iii) Give the role played by soil …
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Marking Guide Agriculture , is an educational document on StudyUganda.com covering Subject Agriculture. This resource includes: "1. (a) You are provided with soil samples A and B. Wet a small sample of A and rub it between the index figure and ……" (Format: PDF) — 172.34 KB, 5 pages. Added July 23, 2026.

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