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Introduction to Growing Sugarcane

Sugarcane is a tall perennial grass of the genus Saccharum, native to Southeast Asia and parts of the South Pacific. It can grow in warm temperate or tropical climates. The internodes of the plant stalk are rich in the sugar sucrose, and the plants can grow to a height of two to six meters.

Every cultivar of commercially-grown sugarcane is a complex hybrid between several species and subspecies, all of which can potentially cross.

PLANTING CONDITIONS

Climate

Though sugarcane can be cultivated in temperate zones, productivity is much higher in tropical climates. A long, sunny, and hot (32 °C to 38 °C, 90 °F to 100 °F) growing season with moderate to high levels of rainfall (1100 and 1500 mm total), combined with a dry and cooler (12 ˚C to 14 ˚C, 54 °F to 57 °F) harvest season is ideal.

The amount of sugar accumulated in the dry weight at harvest is highly variable, and depends on the climate conditions during the various phases of the plant’s growth.

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Soil

Sugarcane can grow in various types of soils – sandy, loamy, and clay soils, as well as both acidic and alkaline soils (within the pH range of 5 to 8.5). A well-drained loam with a pH of roughly 6.5 is absolutely ideal, but mechanical factors, such as soil compaction, are much more consequential to crop success than soil composition and pH. Therefore, when uploading the soil test in SMART FERTILZIER SOFTWARE all these factors such as CEC, soil texture, and pH are assessed by the algorithm in order to calculate a tailored fertilization plan.

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GROWTH AND HARVEST

Planting

Sugarcane is vegetatively or clonally propagated, in order to ensure consistent cultivar characteristics. Planting is usually the most expensive procedure in the growing season.

Stalk sections, called “billets,” “setts,” or “seed pieces”—containing one or more buds—are usually planted in late summer, rooting and developing into a stand over winter.

During this time, the rooting plants are very vulnerable to rot and predation, and are thus often sprayed with insecticide and fungicide before being placed in the seedbed.

Growing

Sugarcane can take between 9-24 months to harvest, depending on the climate. There is one harvest of the primary crop, and then 3-4 harvests of the “ratoon”, or re-growth.

In areas with less than 1500 millimeters meters of annual rainfall, the crop requires drip irrigation.

Ripening

Ripening lasts for about three months, in which time the stalk dries out and accelerates the synthesis and storage of sugar. Simple sugars like fructose are converted into sucrose during ripening.

Harvest

A cane harvester is used to cut down the full stalks, and cut them into smaller sections (around 30 cm). The harvester is trailed by a cane haul out, which collects the billets.