Table Showing Number Of Plants, At Given Distances, Contained In A Square Rod, Pole, Or Perch

Inches apart.

No. of Plants

3x3 ......

4356

4x4 ......

2450

5x4 ......

1960

6x4 ......

1633

6x6 ......

1089

8x6 ......

816

Inches apart.

No. of Plants.

8x8 ......

612

10 X 8 ......

490

10 x 10 ......

392

12 x 12 ......

272

15 x 10 ......

261

By multiplying the number of plants to a square rod by 160 the number per acre is obtained.

Table Showing Number Of Plants Contained In 1 Acre Of Land At Different Distances Apart

Inches apart.

No. of Plants.

30 X 12 ......

17,424

30 X 18 ......

11,616

30 X 24 ......

8,712

Inches apart.

No. of Plants.

30 x 30 ......

6,969

30 X 36 ......

5,808

30 x 42 ......

4,978

The Rectangle

If it is desired to lay out an acre of ground in the form of a rectangle, the area is divided by the length of one side to ascertain the other. Thus an acre of land = 4840 sq. yd. = 160 sq. poles = 10 sq. chains. A rectangle may be obtained by having sides 88 yd. X 55 yd., by 16 poles x 10 poles, or by 5 chains x 2 chains.

If the length of a rectangle is to be a certain number of times the width, the following rule will serve: Divide the area by the ratio of length to the width, and the square root of the quotient will be the shorter side required; whence the longer is also known. If it is desired to lay out 30 ac. in the form of a rectangle three times as long as broad, proceed thus: 30 ac. = 300 sq. chains. Divide the ratio of length = 300/30 = 100 sq. chains. Extract the square root: 2√100 =10 chains. Then the rectangle will be 10 chains wide and 30 chains long.

The following table relating to the proportions of a circle, and its equal and inscribed square, will prove useful in calculations: -

1. Diameter of a circle x .8862

side of an equal square.

2. Circumference of a circle x .2821

3. Diameter of a circle X .7071

side of an inscribed square.

4. Circumference of a circle x .2251 =

5. Area of a circle X .6366

6. Side of inscribed square x 1.414 =

diameter of a circumscribed

circle.

7. „ „ x 4.443

circumference of an equal

circle.

8. „ a square x 1.128 =

diameter of an equal circle.

9. „ „ x 3.545 =

circumference of an equal

circle.

From this table one may describe any square or circle of equal dimensions.