AGRICULTURAL MANAGEMENT PRACTICES · GRADE 11
Every distinction begins with one topic at a time.- start now
Grade 11 works the whole syllabus against ONE crop and ONE farm animal. Every worked example in this document uses maize as the crop and sheep as the animal, because CAPS asks for every Grade 11 topic to be learnt against one specific crop and one specific animal enterprise, and these two carry the worked examples here. Learn the PRINCIPLE, not only the maize number: your paper is set on the enterprise of your own agri-ecological region, so a question could arrive on wheat, potatoes, citrus or sunflower. Every rule below is written so that it transfers.
Crop production: the planned growing of a plant enterprise for grain, fibre, fodder or fruit, managed so that the yield and the quality justify the inputs spent on it. Cultivar: a cultivated variety of a crop species, bred and named for a specific set of characteristics such as growth period, yield potential and disease resistance. Critical period: the growth stage at which stress does the most permanent damage to final yield, because the yield component being set at that moment cannot be recovered later.
What you must be able to do
- Locate the main production areas of the crop in South Africa and justify why it is grown there
- Discuss the economic importance of the crop under food security, animal feed, employment and exports
- Classify crops according to their seed and plant characteristics, using the correct group name
- Interpret the growth curve and identify the critical period around flowering
- Distinguish between a crop, a cultivar and a classification group
- Motivate a cultivar choice against yield, disease resistance, growth period and market demand
Where the crop is produced in South Africa, and why there
Maize is the country's largest field crop by area planted. The core production region, often called the maize triangle, is the Free State, North West and Mpumalanga, with substantial areas in Gauteng, KwaZulu-Natal, Limpopo and under irrigation along the Vaal and Orange river schemes such as Vaalharts. Never answer this question with a list of province names only: the marks sit in the REASON each area suits the crop.
| Production area | Conditions | What the farmer does differently there |
|---|---|---|
| Eastern high potential (Mpumalanga highveld, eastern Free State) | Higher and more reliable summer rainfall, deeper clayey soils, longer frost-free window | Higher plant density, longer-growing cultivars, higher fertiliser rates, disease-resistant cultivars because humidity favours leaf disease |
| Western dryland (western Free State, North West) | Lower rainfall, sandy soils, high evaporation, higher production risk | Low plant density, wide rows, short to medium growing cultivars, moisture conservation tillage, drought-tolerant cultivars |
| Irrigation schemes (Vaalharts, Orange river, Douglas) | Water supplied on demand, high radiation, warm season | Very high plant density, full irrigation scheduling, split nitrogen top-dressings, highest yields per hectare |
| KwaZulu-Natal and Limpopo pockets | Warm, variable rainfall, some frost-free winters | Earlier or double planting windows, cultivars chosen for leaf disease resistance and ear rot resistance |
The transferable rule: an area suits a crop when its rainfall amount and distribution, temperature and frost-free period, soil depth and drainage, and distance to the market or processing plant all match the crop's requirements. Maize needs roughly 450 mm to 600 mm of well-distributed rain during the growing season, a frost-free window of about 120 to 150 days, and effective soil depth of at least 600 mm.
Economic importance and the crop's role in the industry
- Food security: white maize is the staple starch food of most South African households, so the size of the crop moves the national food price directly.
- Animal feed: yellow maize is the energy base of poultry, pig, dairy and feedlot rations, so the whole intensive animal industry rests on it.
- Employment: production, transport, silo storage, milling and the input trade all create rural jobs.
- Foreign exchange: in a surplus season the country exports maize into the SADC region, earning foreign currency; in a drought year it must import, spending it.
- Backward and forward linkages: demand for seed, fertiliser, fuel, remedies and machinery ahead of the farm gate, and starch, glucose, oil, silage and grits industries after it.
- Land use: the crop earns a return on arable land that would otherwise carry only extensive grazing.
Classification of crops by seed and plant characteristics
CAPS asks you to classify the crop on the agronomic characteristics of the seed and of the plant. Two lists, both examinable.
Seed characteristics
- Monocotyledon or dicotyledon: maize is a monocotyledon, so it has one seed leaf and parallel leaf veins.
- Endosperm type: dent, flint, floury, sweet, pop and waxy maize. Commercial grain maize in the RSA is mainly dent and flint types.
- Grain colour: white maize for human consumption, yellow maize mainly for animal feed. The colour decides the market.
- Seed size and mass: the thousand-kernel mass sets the kilograms of seed needed per hectare and the planter plate size.
- Germination percentage and purity: printed on the certified seed label and used in the seeding rate calculation.
Plant characteristics
- Life cycle: annual (maize), biennial or perennial (lucerne).
- Use group: grain or cereal, oilseed, fibre, fodder, root and tuber, legume, horticultural. Maize is a summer grain cereal.
- Photosynthetic type: maize is a C4 plant, which is why it uses strong sunlight and water efficiently in a hot summer.
- Root system: a fibrous, adventitious root system spreading in the top 600 mm to 900 mm.
- Flowering habit: monoecious, with a male tassel and a female ear on the same plant, so it is cross pollinated by wind.
- Growth period: short, medium or long season, measured in days or in accumulated heat units.
The growth curve and the critical period
Plot dry matter accumulation against time and every annual crop draws the same S-shaped (sigmoid) growth curve. Three phases, and each one carries a different management job.
| Phase of the curve | What the maize plant is doing | Management job |
|---|---|---|
| 1. Slow establishment (lag phase), emergence to about six leaves | Germination, emergence, a small leaf area and a root system building out; dry matter gain is slow | Correct planting depth and stand, cutworm control, the weed-free window, starter fertiliser banded at planting |
| 2. Rapid linear growth (log phase), six leaves to tasselling | Stem elongation, fastest leaf and stem growth, tassel and ear initiation, highest nutrient and water uptake per day | Nitrogen top-dressing, stalk borer scouting and control, weed control finished, irrigation not allowed to fall behind |
| 3. Plateau and ripening, silking to physiological maturity | Grain filling, dry matter moved from leaves and stem into the kernels, then a black layer forms and the plant senesces | Protect leaf area from disease, keep water available through grain fill, then let the grain dry down to safe storage moisture |
The critical period for maize runs roughly from two weeks before to two or three weeks after silking, that is, around flowering. Kernel number per ear is fixed in that window, and a kernel that never sets cannot be recovered by good rain in March. Water stress, nitrogen shortage, hail or heavy leaf disease during the critical period cuts yield more than the same stress at any other stage.
Choosing a cultivar, and defending the choice
A cultivar question is never "name a cultivar". It is "give THREE reasons why a farmer would use this cultivar", and the reasons must fit the farm described in the question.
| Criterion | What the farmer looks at | Reason for using it |
|---|---|---|
| Growth period | Short (about 120 to 130 days), medium, or long season | The crop must reach physiological maturity before the first frost. A late planting or a short season area needs a short growing cultivar. |
| Yield potential and yield stability | Trial results across several localities and seasons | A high potential cultivar pays on irrigation or deep soil; a stable cultivar that yields moderately in a bad year suits dryland risk. |
| Disease resistance | Grey leaf spot, northern leaf blight, common rust, maize streak virus, ear rots | Resistance is the cheapest disease control there is: it costs nothing extra per hectare after the seed is bought. |
| Insect resistance and herbicide tolerance | Insect-resistant and herbicide-tolerant genetically modified cultivars | Cuts spray costs and simplifies the weed programme, but brings a legal duty to plant a refuge area and to keep records. |
| Standability | Stalk strength, root anchorage, ear height, husk cover | A cultivar that lodges cannot be harvested mechanically and loses grain to ear rot and birds. |
| Grain colour and quality | White or yellow, hard or soft endosperm, hectolitre mass | The market decides: white for the milling trade, yellow for the feed trade. |
| Seed price and availability | Cost per bag against the seeding rate | Seed is a fixed cost per hectare that must be earned back by the extra yield the cultivar delivers. |
Scenario: A farmer near Bothaville in the western Free State plants dryland maize on sandy soil with an effective depth of 800 mm. Long-term rainfall for the growing season is about 420 mm. He plants in the second half of November. Recommend a cultivar profile and justify it.
Answer:
- Short to medium growing season: a late November planting must reach the black layer before the first frost in about May, so a cultivar of roughly 125 to 135 days is needed. (2)
- Drought tolerance and yield stability rather than top yield potential: at 420 mm on sandy soil the plant available water is limited, so a cultivar that still sets a reasonable ear under stress earns more over five seasons than one that only shines in a wet year. (2)
- Good standability and insect resistance: stalk borer damage plus a weak stalk equals lodged plants that the combine cannot lift, and the crop stands in the land into the dry winter. (2)
Transfer note: swap the crop and the logic holds. On wheat you would ask the same three questions about growing period against the frost or heat window, yield stability against the rainfall, and resistance against the dominant disease of the district.
The cultivar decision is made once a year, costs nothing extra to get right, and sets the ceiling on everything the farmer does afterwards.- crop planning note
- Where: this topic carries about 20 of the 200 marks, mostly inside the crop question in Section B plus a share of the Section A terminology items. Which numbered question the crop content lands in is decided by the school that sets your paper, so prepare the content, not a question number.
- Typical questions: "Name the main production areas and give a reason for each", "Discuss the economic importance of the crop", "Draw and label the growth curve and indicate the critical period", "Give THREE reasons why a farmer would choose this cultivar".
- What earns marks: a reason attached to every name, categories rather than one long paragraph, a labelled sketch when the question says draw, and cultivar reasons matched to the farm described in the scenario.
- Remember the paper is set on YOUR school's enterprise. Write the principle first, then the maize example, so the answer still works if the crop in front of you is wheat or potatoes.
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Feeling the pressure? Take a breath.
Exam stress is completely normal. Here are a few things that actually work. None of this replaces a doctor or a trusted adult.
Box breathing: 4 counts in, 4 hold, 4 out, 4 hold. Do it four times.
Anxiety
- Grounding: name 5 things you see, 4 you hear, 3 you can touch.
- Exam morning: eat, drink water, arrive early, avoid last-minute cramming.
- Reframe "I am going to fail" into "I have prepared, I will do my best".
Concentration
- Work in 25-minute blocks, then a 5-minute break (Pomodoro).
- Put the phone in another room while you study.
- One task at a time. Multitasking costs more than it saves.
Sleep
- Cramming all night backfires: sleep is when the brain locks in memory.
- No screens for 30 minutes before bed.
- The same bedtime every night keeps the brain sharp.
Study habits
- Active recall (testing yourself) beats passive re-reading by far.
- Space your study across days; do not cram it all into one.
- Practise past papers under time. That is exactly how these notes are built.
Build your own revision plan
Look at the worked example below first, then make your own. Tick off each topic as you finish it.
Example (already filled in)
| Date | Subject | Topic | Done |
|---|---|---|---|
| Mon 8 Jul | Agricultural Management Practices | Your weakest topic, notes + summary | ✓ |
| Tue 9 Jul | Agricultural Management Practices | Next topic + 10 practice questions | ✓ |
| Wed 10 Jul | Agricultural Management Practices | A full past paper under time | – |
| Thu 11 Jul | Agricultural Management Practices | Mark the paper, revise weak spots | – |
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|---|---|---|---|
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