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

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

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: -

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