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Let the age of Q be x years. Then the age of P = x + 10 years, And the age of R = (x + 10) - 5 = x + 5 years. The sum of their ages = 120, so: x + (x + 10) + (x + 5) = 120, 3x + 15 = 120, 3x = 105, x = 105 / 3 = 35 years. The age of Q is 35 years.
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____