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Let us consider the height of the tower as AB, the distance between the foot of the tower to the point on the ground as BC. In ΔABC, trigonometric ratio involving AB, BC and ∠C is tan θ. tan C = AB/BC tan 30° = AB/30 1/√3 = AB/30 AB = 30/√3 = (30 × √3) / (√3 × √3) = (30√3)/3 = 10√3 Height of tower AB = 10√3 m.
Which clay mineral group is known for its ability to swell and expand when wetted?
The EC of Sodic soil is __mmho/cm at 25 ℃ .
Which soils are known as self-tilled soils
Which method measures soil moisture content by drying a sample in an oven and determining the percentage of moisture loss?
According to USDA classification of salt affected soils; a soil having EC >4 mmho/cm; ESP >15; pH
What is the color of the tag used for certified seed?
The indicator plant for zinc deficiency is ____
The study of soil from the stand point of higher plants is known as……………………….
Sodic soils are also known as_____
The Soil moisture potential at permanent wilting point is____