Why learn agriculture with information
Agriculture is a practical subject. We learn by growing, but memory is not enough. When we write down what we did and what happened, we can compare, find causes and teach others. Information turns experience into learning.
Information we use: weather, soil test, seed details, dates, amounts of water and fertiliser, plant measurements, cost and income.
The learning loop: Plan, Do, Record, Review
- Plan: choose the crop, the plot, the dates, what to measure and what you expect.
- Do: sow, water, weed, protect. Follow the plan and note any change.
- Record: write dates and measurements in a farm diary, with units.
- Review: compare results with the plan, find causes, and decide what to change.
Then the loop starts again with a better plan.
Keeping a farm diary
A good diary has one line per visit.
| Date | Work done | Measure | Note |
|---|---|---|---|
| 5 June | Sowing | Seed 20 g | Soil damp |
| 12 June | Water 2 L | Height 3 cm | First leaves |
Rules: write on the same day, use the same units, record what is bad as well as what is good, and take a photo if you can. A computer spreadsheet helps to add up and draw charts.
Using the records to improve
After the season, add up costs and income, find the average growth per week, and draw a chart. Ask: did we follow the plan? Which change helped? Share the results with classmates and local farmers. Keep the diary for the next batch, so you do not start from zero.
Try it: grow a bean
Soak 3 beans overnight. Plant them in a cup with soil. Water a little each day. Every 2 days measure the stem and write it in a small table. After 14 days draw bars. Which two days grew the most?
Key formulas and definitions
- Learning loop: Plan, Do, Record, Review
- Average growth per week = total growth / weeks
- Profit = income - cost
- Good record: date + work + measure + unit + note
Worked examples
1. Plant height in cm at weeks 1 to 4: 3, 7, 12, 18. Find the growth in week 4.
Week 4 growth = 18 - 12 = 6 cm.
2. Using the heights 0, 3, 7, 12, 18 cm at weeks 0 to 4, find the average growth per week.
Total growth = 18 - 0 = 18 cm in 4 weeks. Average = 18 / 4 = 4.5 cm per week.
3. A school plot cost Rs 800 (seed, compost, water) and gave vegetables worth Rs 1,250. Find the profit.
Profit = 1250 - 800 = Rs 450.
4. The plan said 30 cm by week 5. The diary shows 25 cm. At the Review step, what should you do?
Find the cause using the diary (water, light, pests). Then decide a change, such as more sun or more compost, and write it in the next plan.
Common mistakes
- Skipping the plan and just planting. Without a plan you cannot compare.
- Writing records days later from memory, so numbers are wrong.
- Recording only good results. Problems are the best teachers.
- Not reviewing. Records that nobody reads teach nothing.