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.