CROP PRODUCTION Notes, Quizzes & Revision
📘 Revision Notes • 📝 Quizzes • 📄 Past Papers available in app
Subject: subject_replace
Topic: topic_name_replace — Subtopic: CROP PRODUCTION
Target learners: age_replace (Kenya context). These notes give clear, practical points on crop production appropriate for Kenyan farming systems, schools and extension classes.
1. What is crop production?
Crop production is the process of growing plants for food, cash or industrial use. It covers site selection, soil management, planting, crop care (weed, pest and disease control), water management, harvesting and post‑harvest handling.
2. Why is crop production important in Kenya?
- Food security: maize, beans, cassava, sweet potatoes and vegetables feed households.
- Income: tea, coffee, horticulture (flowers, vegetables, fruits) and sugarcane are major earners.
- Employment: farming employs many Kenyans in rural areas.
- Raw materials: crops supply industry (cotton, sugar, oil seeds).
3. Major Kenyan crops and where they grow
Cereal & staple crops: maize (high and medium rainfall areas), sorghum, millet (arid and semi‑arid), wheat (highland areas).
Roots & tubers: Irish potato (highlands), sweet potato and cassava (lower rainfall areas).
Cash crops: tea (highlands: Kericho, Nandi), coffee (central highlands), sugarcane (lake and coastal lowlands), cut flowers (Nairobi and Rift Valley greenhouse areas).
Horticulture: tomatoes, onions, kales, avocado and mangoes—important close to urban markets.
Roots & tubers: Irish potato (highlands), sweet potato and cassava (lower rainfall areas).
Cash crops: tea (highlands: Kericho, Nandi), coffee (central highlands), sugarcane (lake and coastal lowlands), cut flowers (Nairobi and Rift Valley greenhouse areas).
Horticulture: tomatoes, onions, kales, avocado and mangoes—important close to urban markets.
4. Key factors affecting crop production
- Climate: rainfall amount and distribution (long rains Mar–May, short rains Oct–Dec), temperature.
- Soil: texture, fertility, pH and depth.
- Seed quality: improved/ certified seed gives better yields.
- Pests & diseases: fall armyworm, stem borers, potato late blight, maize streak; timely control is essential.
- Management: planting date, spacing, fertilizer, weeding, and water control.
5. Practical steps in crop production (simple sequence)
- Choose site & variety: match variety to climate (drought-tolerant in ASALs, early maturing where rains are short).
- Soil testing & preparation: test pH and nutrients where possible; plough/rotavator, break clods and level seedbed.
- Planting time & spacing: plant at the start of reliable rains; follow recommended spacing (e.g., maize 75 cm x 25–30 cm for many Kenyan varieties).
- Fertilizer & manure: apply basal and top dressings based on crop needs and soil tests (e.g., DAP on planting, CAN top dressing for maize).
- Water management: use rainfed methods, supplemental irrigation (furrow, drip for vegetables) or water harvesting in dry areas.
- Weed control: timely hand-weeding, hoe or herbicide as appropriate.
- Pest & disease management: monitor crops, use integrated pest management (IPM): cultural, biological and chemical controls only as needed.
- Harvesting: harvest at correct maturity to maintain quality and reduce losses.
- Post‑harvest handling & storage: drying, cleaning, safe storage (PICS bags, proper cribs), sorting to reduce aflatoxin and pests.
6. Simple visual: maize planting spacing (example)
Example spacing for many Kenyan maize varieties: rows about 75 cm apart and plants 25–30 cm within the row. Closer spacing suits short-season hybrids; wider spacing for bulky landraces.
7. Pest & disease management (IPM approach)
- Regular scouting; early detection reduces losses.
- Cultural control: crop rotation, timely planting, removal of infected residues, use of clean seed.
- Biological control: use of natural enemies (parasitoids, predators).
- Chemical control: use approved pesticides, follow label rates, use protective equipment and avoid overuse.
- Resistant varieties: choose varieties tolerant to common local pests/diseases.
8. Harvesting and post‑harvest handling
When to harvest: harvest at physiological maturity (drying signs for cereals; size/color for fruits).
Drying: reduce moisture to safe levels (e.g., maize <13.5%) to avoid aflatoxin and mold. Use solar driers, raised platforms or tarpaulins.
Storage: clean and dry stores; use hermetic bags (PICS) or metal silos where possible.
Value addition: milling, drying, canning or packaging increases market value and shelf life.
Drying: reduce moisture to safe levels (e.g., maize <13.5%) to avoid aflatoxin and mold. Use solar driers, raised platforms or tarpaulins.
Storage: clean and dry stores; use hermetic bags (PICS) or metal silos where possible.
Value addition: milling, drying, canning or packaging increases market value and shelf life.
9. Soil conservation & sustainable practices
- Contour farming and terracing on slopes to reduce erosion.
- Mulching and cover crops to retain moisture and add organic matter.
- Minimum tillage and conservation agriculture: crop rotation, residue retention, timely planting.
- Integrated soil fertility management: combine organic manure with recommended fertilizers.
10. Health, safety and environment
- Wear gloves, masks and protective clothing when mixing or spraying chemicals.
- Store chemicals in locked, labelled places away from food.
- Dispose empty pesticide containers at approved collection points.
- Reduce overuse of chemicals — practice IPM and follow extension advice.
11. Quick classroom/farm checklist (use before planting)
- Have you chosen the right variety for your zone?
- Is the seed certified or good quality?
- Has the soil been tested or refreshed with compost/manure?
- Do you have recommended fertilizer and planting tools?
- Is there a plan for pest scouting, watering and harvest?
12. Where to get help in Kenya
County agricultural extension offices, Kenya Agricultural & Livestock Research Organization (KALRO) centres, and farmer cooperatives provide region-specific advice, certified seed, trainings and market information.