Crop Production and Management
Crop Production and Management
Crop production gives 1 to 2 questions and is the topic where science meets Bihar's own economy, since the state is overwhelmingly agricultural. The agricultural practices in order, and the kharif and rabi split, are the two areas asked.
The Agricultural Practices in Order
- Preparation of soil — ploughing, levelling and manuring.
- Sowing — by traditional tool or by seed drill.
- Adding manure and fertiliser.
- Irrigation.
- Protecting from weeds — weeding.
- Harvesting.
- Storage.
The order is asked as a sequencing question, so learn it as a chain rather than as a list. Ploughing loosens and turns the soil, which brings nutrients up and lets roots breathe. A seed drill sows seed at the correct depth and spacing, which saves seed and gives even germination.
Kharif and Rabi
| Point | Kharif | Rabi |
|---|---|---|
| Sown | June to July, with the monsoon | October to December |
| Harvested | September to October | March to April |
| Water | Depends on rain | Needs irrigation |
| Crops | Rice, maize, jute, cotton, soybean | Wheat, gram, pea, mustard, linseed |
Bihar's main kharif crop is rice and its main rabi crop is wheat, with maize important in the north and east of the state. Since kharif depends on the monsoon and Bihar is watered by the Bay of Bengal branch, a delayed monsoon is a kharif crisis — which links this topic to the geography chapter.
✗ Wheat is a kharif crop sown with the monsoon | ✓ Wheat is rabi, sown in winter; rice is the main kharif crop
Manure and Fertiliser
| Point | Manure | Fertiliser |
|---|---|---|
| Source | Natural, from decomposed plant and animal waste | Chemical, made in factories |
| Nutrients | Fewer, released slowly | Rich in specific nutrients |
| Effect on soil | Improves texture and water retention | Does not improve texture |
| Long-term effect | Enriches soil | Overuse damages soil and water |
Excessive fertiliser use makes soil less fertile over time and pollutes groundwater, which is why crop rotation and the growing of leguminous crops are recommended. Legumes host Rhizobium in their root nodules and restore nitrogen naturally — the same fact that appeared in the plant nutrition topic, now applied.
Irrigation, Weeding and Storage
- Traditional methods: moat, chain pump, dhekli, rahat.
- Modern methods: sprinkler system for uneven land, drip irrigation for orchards and dry areas.
- Drip irrigation delivers water drop by drop to the root and wastes almost none — the reason it is recommended for water-scarce regions.
- Weeds compete with crops for water, nutrients and light, and are removed manually or with weedicides.
- Grain must be dried in sunlight before storage, or moisture allows fungus and pests to attack.
Storage is the step most often skipped in revision and most often asked. Dried grain is kept in silos and granaries, and dried neem leaves are a traditional protection at home.
Food from animals matters too: animal husbandry covers rearing for milk, eggs and meat, and it is a significant part of Bihar's rural economy alongside crop farming.
खरीफ — मानसून के साथ, रबी — जाड़े में।
TRE pointer: The kharif and rabi table is asked in both Part-II geography and Part-III science, so one revision covers two papers. The manure-versus-fertiliser comparison is the second item, and drip irrigation for water-scarce areas the third. For a Bihar candidate the rice-and-wheat pairing is worth learning with the state attached, since a question may name Bihar directly. With −1/3 negative marking, the sequencing question rewards learning the practices as a chain.
60-Second Recap
- Seven practices in order, from soil preparation to storage.
- A seed drill sows at correct depth and spacing, saving seed.
- Kharif is sown with the monsoon and includes rice; rabi is winter-sown and includes wheat.
- Manure improves soil texture; fertiliser adds nutrients but overuse harms soil and water.
- Legumes with Rhizobium restore nitrogen, which is why crop rotation is recommended.
- Drip irrigation saves the most water; grain must be dried before storage.
Frequently Asked Questions
What is the difference between manure and fertiliser?
Manure is natural, made from decomposed plant and animal waste, and improves soil texture and water retention while releasing nutrients slowly. Fertiliser is manufactured, rich in specific nutrients and fast acting, but it does not improve soil structure and overuse degrades soil and water.
Which are the main kharif and rabi crops in Bihar?
Rice is the main kharif crop, sown with the monsoon in June and July, and wheat is the main rabi crop, sown in winter. Maize is also important in the north and east of the state. Bihar's kharif harvest depends heavily on the monsoon.
Why is drip irrigation recommended for dry regions?
Because it delivers water drop by drop directly to the root zone through narrow pipes, so almost nothing is lost to evaporation or runoff. Sprinkler systems suit uneven land where channels cannot be dug, but drip irrigation is the most water-efficient method available.
Why must grain be dried before storage?
Because moisture allows fungi, bacteria and insect pests to attack the stored grain and spoil it. Drying in sunlight reduces the moisture content to a safe level. Grain is then stored in silos or granaries, with dried neem leaves used traditionally at household scale.