Sorghum

Sorghum is grown across a wide range of production systems, from subsistence food-grain farming in semi-arid Africa and Asia to large-scale mechanized grain and forage production in the Americas and Australia.

Because input requirements are often lower than for crops such as maize, sorghum is frequently grown on more marginal or moisture-limited land, though it also responds well to more favorable growing conditions and inputs where they are available.

Family

Poaceae (grass family)

Genus

Sorghum

Principal species

Sorghum bicolor

Growth habit

Warm-season annual grass producing a terminal panicle of grain, using C4 photosynthesis

Sorghum was domesticated in northeastern Africa, in the region spanning present-day Sudan and Ethiopia, several thousand years ago, and subsequently spread across Africa and into South Asia before later introduction to the Americas.

Sorghum remains a staple food grain in parts of Africa and Asia and is a major feed and industrial grain crop in the Americas. Production and trade statistics are compiled by FAO and USDA and should be taken from those primary datasets.

Sorghum is a warm-season crop, sensitive to frost and cool soil temperatures at planting, but notably tolerant of heat and drought once established, relative to many other cereal crops.

This drought tolerance reflects a deep root system and physiological mechanisms that reduce water loss under moisture stress, allowing the crop to resume growth once conditions improve rather than failing outright.

Sorghum is adaptable to a wide range of soils, including loams and silt loams, and shows somewhat greater tolerance of marginal conditions, including transient waterlogging and moderate salinity, than many other cereals.

Sorghum is sown once soils have warmed sufficiently in spring or early summer, into a firm, shallow seedbed suited to its relatively small seed size, with seeding rate and row spacing set locally according to moisture availability and end use.

• Variety selection matched to grain, forage, or sweet-sorghum end use
• Crop rotation to manage soil-borne pests and diseases
• Timely weed control during early crop establishment
• Seedbed preparation suited to local tillage and moisture conditions

Nitrogen strongly influences grain yield and tillering, while phosphorus supports early root establishment. Overall input requirements are often lower than for maize, reflecting sorghum's comparatively efficient water and nutrient use.

Sorghum is predominantly grown under rain-fed conditions in semi-arid production regions, where its drought tolerance is a key advantage relative to more water-demanding cereals. It is also grown under irrigation, including sprinkler systems, in higher-input production systems.

Even with its drought tolerance, adequate moisture during flowering and grain fill remains important for maximizing yield potential.

Anthracnose is a major foliar and stalk disease of sorghum in many production regions, and sorghum downy mildew is a classic disease particularly associated with humid or tropical growing conditions. Aphids, including species with a broad host range across grasses, and fall armyworm are among the key insect pests affecting sorghum.

Management combines resistant hybrids and varieties, rotation, monitoring, and — where justified — locally authorized control products applied according to their labels.

Grain sorghum is harvested with a combine-harvester once the grain has matured and dried to a moisture content suitable for safe storage, while forage and silage types are cut at a growth stage matched to their intended feeding use.

• Food grain, especially in parts of Africa and Asia
• Livestock feed grain, particularly in the Americas
• Forage, silage, and hay production
• Sweet sorghum for syrup, and grain sorghum for industrial and brewing uses