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# Internal Assessment:Observing and testing standard of soil

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Introduction

Gimazija Bezidgrad Suhrob Mahkamov Biology Sl 3Q Andrej Podobnik 11.05.09 Observing and testing standard of soil. Introduction: The main issue of growing up the plants in good condition is dependent on many factors like soil, the pH, the amount of humus and water and etc. This gives to plant different options. In this experiment specimen of soil from the 1-15cm and after 15cm from every examined named: transition, pathway, meadow will be taken. The main purpose of this lab work was to observe the properties of soil and to find the values of their pH, amount of water, amount of humus and amount of limestone. Hypothesis - The pH of the soil has to have neutral results (7), because the plants would be slaughtered by acidic soil. - The least limestone consist area is meadow, as observation shows meadow have most plants in comparison with all areas. With high concentration of CaCO3 that amount of plants would be able to growth. Variables The fixed variable: in this experiment is rate of heat, Independent: the mass and type of soil. Dependent: is the mass of water, humus, CaCO3 and pH. ...read more.

Middle

Only beakers have to be changed to the smaller beakers. Write down results. III) Finding pH of the soil: - Add 10 cm� of potassium chloride to one teaspoon of soil. - Shake the test tube, and wait till solutions becomes clean, test pH using indicator paper - Write down results IV) Finding the Amount of CaCO3: - Add 10% of HCl to soil sample on a Test tube. - Observe, and using the table given (appendix) to find the amount of CaCO3 in the soil. Data Collection Here are results of Soil 1-15 cm: pH CaCO3 Transition 7 5% Pathway 7 5% Meadow 7 Less than 1% Amount of humus: * 1-15cm SOIL Before heating (g) After heating (g) Transition 30,01 - 20,56 = 9,45 26,04 - 20,56 = 5,48 Pathway 26,43 - 20,45 = 5,98 23,86 - 20,45 = 3,41 Meadow 28,12 - 20,27 = 7,85 25,07 - 20,27 = 4,8 (mass before heating - mass after heating) (g) Transition 3,97 = 42,01 % Pathway 2,57 = 42,97 % Meadow 3,05 = 38,8 % Amount of water: * 1-15cm SOIL Before heating (g) ...read more.

Conclusion

This can be caused by people, bicycles, cars who walk their day by day. And can be reason why plats can't growth freely there and why so little types of species growing there. Observation of meadow showed that it has most amount water and because of that it have most amounts of spices and development of plants. The same case can be observed under 15cm too. Meadow has the richest plants and their growth is the highest. Turning to humus, meadow has it less then pathway. Pathway and transition soil are near in percentage while meadow has less. Deeper in the soil observed the percentage of humus in the pathway soil increases while in both, transition and meadow it lowers. This again causes trouble for the growth and developing of plants. The pH value is the same for all soils which proves that neutral soil is the best solution to growth for plants. The CaCO3 content is highest again in the pathway soil, while in the meadow it is the lowest. Knowing that the meadow was much richer with plant species conclusion can be that lower percentage of limestone is better for the life of the plant. Having high limestone percentage can harm the plant. ...read more.

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