HISTOGRAM, USES AND HOW TO CONSTRUCT IT

HISTOGRAM, Meaning of histogram

 Histogram is a graphical representation of frequency distribution. It is made up of a set of rectangles that have their bases on the horizontal axis, i.e. X – axis, and their frequency on the vertical axis, Y – axis. They also have their rectangles at the centre on the class mark (i.e mid point) of each interval.

SSHISTOGRAM

WEED AND THEIR BOTANICAL NAMES

1. ENVIRONMENTAL FACTORS AFFECTING AGRICULTURAL PRODUCTION
2. DISEASES
3. 52. SOIL MICRO-ORGANISMS
4. ORGANIC MANURING
5. FARM YARD MANURE
6. HUMUS
7. COMPOST
8. CROP ROTATION
9. GRAZING AND OVER GRAZING

  1. IRRIGATION AND DRAINAGE
  2. IRRIGATION SYSTEMS
  3. ORGANIC MANURING
  4. FARM YARD MANURE
  5. HUMUS
  6. COMPOST
  7. CROP ROTATION
  1. IRRIGATION AND DRAINAGE
  2. IRRIGATION SYSTEMS
  3. INCUBATORS
  4. MILKING MACHINE
  5. SIMPLE FARM TOOLS
  6. AGRICULTURAL MECHANIZATION
  7. THE CONCEPT OF MECHANIZATION
  8. PROBLEMS OF MECHANIZATION
  9. SURVEYING AND PLANNING OF FARMSTEAD
  10. IMPORTANCE OF FARM SURVEY
  11. SURVEY EQUIPMENT
  12. PRINCIPLES OF FARM OUTLAY
  13. SUMMARY OF FARM SURVEYING
  14. CROP HUSBANDRY PRACTICES

HOW TO DRAW A HISTOGRAM

 The areas of the rectangles are proportional to the class frequencies. In drawing a histogram, there is no gap or space between two bars, unlike the bar chart.

fabiohistogram

EXAMPLE OF THE USE OF HISTOGRAM

A farmer harvested 60 tubers of yam for eight days. The number of yam harvested per day is shown in table 2.9. Draw a histogram to represent the information.

Table 2.9: Number of tubers of yam harvested in a farm.

No. of days12345678
Tubers of yam4127202915
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