neha wants to keep a check on a growth of a plant sapling suggest her how she can measure the rate of growth of a plant
Answers
Answer:
1
Measuring Plant Height
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Set the ruler at the base of the plant. Smaller plants can be measured with a ruler, while taller plants may require a measuring tape, yardstick, or meter stick. Make sure that the ruler begins at zero on the bottom.
If you are measuring a plant in a pot, the ruler should begin at ground level.[1]
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Record the height of the plant. You will want to measure the plant from its base to its highest point. Write this down in a chart with both the date and the height recorded. Repeat every two to three days.[2]
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Calculate the average using the growth rate formula. You can see the average daily growth rate by taking the change in size and dividing it by the amount of time it has been growing.
The equation for the growth rate formula is (S2−S1)T{\displaystyle {\frac {(S2-S1)}{T}}}where S1=first measurement, S2=second measurement, and T equals the number of days between each.[3]
This is an extremely general figure. Plant growth rate is extremely fluid and can be subject to major variations day by day. Currently, there is no way to accurately predict exact daily growth rate without the use of sophisticated laboratory equipment.
Method 2
Judging Leaf Size
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Create a chart. Your chart should have rows for each date that you measure your leaves. The columns should be labeled “number of leaves,” “average length,” and “average width.” You should check your leaves every two to three days.
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Count the leaves on your plant. Be extremely thoroughly, but make sure you do not count the same leaves twice. Include new leaf tips and sprouts in your count. Record the number of leaves down in your chart.
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Mark the length and width. Choose a random sampling of four or five leaves. Hold the ruler from the bottom to the tip of the leaf. Add up the measurements, and divide by the number of measurements you took. (For example, if you measured by five leaves, divide by five). This is the average leaf length for that day. Record this down in your chart.
Repeat this process to find the width of the leaves. Measure the leaves at their widest part.
Be as specific as possible; get the measurement down to centimeters and millimeters if you can.
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Trace your plant's leaves on grid paper. Keeping the leaf on the plant, draw around the leaf on grid paper. The grid should have squares that are one inch in area. Count the number of squares covered to get the surface area of each leaf.
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Repeat measurements every two or three days. Leaves can grow quickly. Check the size of your leaves every few days to see how they are growing. You can use a modification of the growth rate formula for this purpose.
You can calculate the leaf number growth rate. This modification of the growth rate formula will tell you how many leaves are approximately growing per day. The equation for this growth rate is (L2−L1)T{\displaystyle {\frac {(L2-L1)}{T}}}where L1=first leaf count, L2=second leaf count, and T equals the number of days between each.
The leaf size formula is the same as the plant height formula. Instead of height, the variable is the surface area. The equation for the growth rate formula is (S2−S1)T{\displaystyle {\frac {(S2-S1)}{T}}}where S1=first surface area measurement, S2=second surface area measurement, and T equals the number of days between each.[4]
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Create a growth template. Once you have gathered a few weeks’ worth of leaf tracings, you can use those shapes to create a template. Take a piece of paper or cardboard. Take the smallest tracing, and create a circle roughly that size, starting from the bottom of the paper. Create up to six larger circles that contain all of the measurements up to the largest. These should form concentric rings outside of the first circle. Label each of these circles with a number. One should be the smallest and six, the largest.[5]
In the future, you can use this template to measure leaves with greater ease. Hold up the leaf at the bottom of the paper with it centered around the smallest circle. Mark the largest circle it fills without going over and record that as the leaf size.
hope it helps.
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