Question
In case of degraded alkali soil, if the extensive
leaching of saline-sodic soil occurs in absence of any source of calcium and magnesium, part of exchangeable Na is frequently replaced by __ ?Solution
If extensive leaching of a saline-sodic soil occurs in the absence of any source of calcium or magnesium, part of the exchangeable sodium is gradually replaced by hydrogen. Such soil may be slightly acidic in nature, yet it may contain enough sodium to give it an unstable structure. Such a soil is designated as a degraded sodic soil, earlier known as degraded alkali soil.
I). p2 - 20p + 51 = 0,
II). 2q2 - 7q + 6 = 0
Equation 1: x² - 90x + 2025 = 0
Equation 2: y² - 88y + 1936 = 0
1.3wx = 40 – wy
2. b2 = 2b + p
3. d2 + d = q
Now, observe the given conditions:
One root of equation...
I. x³= ((4)5+ (15)³)/(3)4
II. 8y³=(-13)3÷ √1521+ (3y)³Â
I. 4x2 + 3√7 x-7 =0
II. 7y2 + 4√7 y-5=0
- Suppose both the roots of q² + kq + 49 = 0 are real and equal, then determine the value of 'k'.
If x² + 2x + 9 = (x – 2) (x – 3), then the resultant equation is:
I. x3 = 1728
II. y2 – 15y + 56 = 0
- If the quadratic equation x² + 18x + n = 0 has real and equal roots, what is the value of n?
In the question, two equations I and II are given. You have to solve both the equations to establish the correct relation between 'p' and 'q' and choose...
