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The combine harvester is one of the most valuable machines on a grain farm. Its ability to perform multiple tasks in a single field pass saves time, fuel, and labor. However, many operators only use a fraction of its potential. This article explains the uses of combine harvester in detail, from standard grain harvesting to specialty crop applications. It also refers to the broader types of harvesting machines for context. Reliable equipment from manufacturers like Shijiazhuang Tianren Agricultural Machinery Equipment Co., Ltd helps farmers achieve consistent results across seasons.
A combine performs three basic operations:
Reaping – Cutting the crop at the base.
Threshing – Separating grain from the ear or pod.
Winnowing/cleaning – Removing chaff, dust, and small debris.
Beyond these, modern combines include yield mapping, moisture sensing, and automatic adjustment systems. The uses of combine harvester have expanded with precision agriculture.
| Crop | Header Type Needed | Special Consideration |
|---|---|---|
| Wheat / Barley | Grain platform (auger or draper) | Adjust concave clearance for grain size |
| Rice | Track-mounted combine or high-clearance | Wet field operation requires floatation tires |
| Corn (maize) | Corn head with snapping rolls | Remove ear snappers for shelled corn |
| Soybeans | Flexible grain platform | Low cutting height to pick up low pods |
| Sunflowers | Sunflower header (with row dividers) | Slow drum speed to avoid seed damage |
| Canola | Draper header with pick-up reel | High air flow to prevent wrapping |
1. Moisture management – Harvesting grain above 18% moisture increases drying costs. Below 12% may cause shatter loss. Aim for 13–15% for most cereals.
2. Speed vs. loss – Higher ground speed increases throughput but also increases grain loss over the rear of the machine. The optimal speed is where header loss equals separator loss.
3. Concave and rotor settings – For wheat, a wide concave clearance (10–15 mm) reduces crackage. For rice, tighter clearance (5–8 mm) improves threshing.
4. Header height control – Automatic height control systems reduce soil ingestion and blade wear. This is especially important when using a combine for lentils or chickpeas.
Some farmers employ a combine for non-grain tasks:
Harvesting grass seed – Requires a pickup header and fine sieve adjustments.
Harvesting medicinal herbs (seed stage) – Low drum speed prevents seed crushing.
Cleaning stored grain – A stationary combine with a feeding conveyor can act as a large cleaner.
Terminating cover crops – A rolling crimper mounted on the combine header flattens and kills cover crops before cash crop planting.
While the combine is versatile, it is not universal. For root crops (potatoes, beets) or forages (silage), other types of harvesting machines perform better. A forage harvester, for example, chops the entire plant into 10–20 mm pieces for anaerobic fermentation. A combine cannot produce silage because it leaves the straw behind. Therefore, knowing the types of harvesting machines helps avoid misapplication.
Q1: Can a combine harvester harvest sunflowers?
Yes, with a special sunflower header that includes row dividers and a stalk puller. The rotor speed should be reduced to avoid seed breakage.
Q2: What is the most common use of combine harvester worldwide?
Wheat and rice harvesting. These two crops account for the majority of combine operating hours globally.
Q3: How does a combine harvester separate grain from straw?
Threshing happens between a rotating drum (rotor) and concave grates. Grain and chaff fall through the concave, while straw moves to the rear. A cleaning fan and sieves then separate grain from chaff.
Q4: Can a combine be used for silage making?
No. A combine leaves the straw on the field. For silage, you need a forage harvester with a silage header. Some combines have a whole-crop attachment, but the result is not true silage – it lacks proper chopping length and kernel processing.
Q5: How do I choose between different types of harvesting machines for my farm?
Evaluate your primary crops. For grains, a combine is essential. For hay and silage, buy a mower-conditioner and a forage harvester. For roots and tubers, specialized harvesters are required. Consult a supplier like Shijiazhuang Tianren Agricultural Machinery Equipment Co., Ltd for specific recommendations.
The uses of combine harvester go far beyond simple grain cutting. From wheat to sunflowers, from seed cleaning to cover crop management, a well-operated combine is a multi-tool for the modern farm. However, it is one part of a larger family of types of harvesting machines. Understanding each machine’s role helps build an efficient, low-cost harvest system. Regular maintenance and proper header selection unlock the full potential of your combine. Always refer to your equipment manual and seek professional training for best results.