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Luden [163]
2 years ago
9

How agriculture is affected by the saline soils?

Geography
1 answer:
Olegator [25]2 years ago
6 0

Answer: Salinity negatively affects the plant growth.

Explanation:

Salinity can be defined as the increase in concentration of salt in the soil. The increase in salinity negatively affects growth of the plants. The salinity restricts the uptake of essential minerals that are required by the plants for their survival and reproduction for example, nitrogen uptake is restricted by the salinity. Salinity reduces the growth of the plants and also restricts the reproduction process. Also some ions are toxic for plants, so it causes the death of plants and reduces the expected agricultural yields.

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by how much sun it receives.

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You have a wire that is 23 cm long. You wish to cut it into two pieces. One piece will be bent into the shape of a square. The o
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In explanation you see the answer but it I see it send it  different  so I just added a file so you can see clearly the way how this exercise works. Please, see the file attached

Explanation:

Let x = circumference of the circle

then

(53-x) = the perimeter of the square

and \frac{53-\times}{4} = the side of the square

and

\left(\frac{53-\times}{4}\right)^2 = the area of the square

:

Find the area of the circle using the circumference

find the radius (r)

2*pi*r = x

r = \frac{\times}{2*\mathbit{\pi}}

r = \frac{\times}{6.28}

Find the area of the circle

\mathbit{A}=\pi r^2

Replace r with \frac{\times}{6.28}

A = π * \left(\frac{\times}{6.28}\right)^2=  * \left(\frac{\times^2}{39.48}\right)      

cancel pi into 39.48

A =  \left(\frac{\times^2}{12.566}\right)

Total area of circle and square

A =  \left(\frac{\times^2}{12.566}\right)+\left(\frac{53-\times}{4}\right)^2  = \left(\frac{\times^2}{12.566}\right)  + \left(\frac{{2809-106\times+\times}^2}{16}\right)

:

convert these fractions to decimal coefficients

A(x) = .0796x^2 + .0625x^2 - 6.625x + 175.5625

A(x) = .1421x^2 - 6.625x + 175.5625

:

Find the axis of symmetry of this quadratic equation (min area)

x =   \frac{-\left(-6.625\right)}{2*.1421}

x =   \frac{6.625}{.2842}

x = 23.31 cm is the circumference when they have min area

Download docx
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To make laws while other laws are in the making of others
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If there is no atmosphere on earth what whould happen ?​
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