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smudging: the process of burning oil to produce smoke to prevent loss of heat from the ground and so to minimise or prevent frost damage to crops and orchards. Using smudging techniques protects crops from frost damage, ensuring better yields and quality.

snap beans: US beans which are eaten in the pod, e.g., green beans or French beans, or of which the seed is eaten after drying, e.g., haricot beans. As opposed to broad beans or Lima beans, the seeds of which are eaten fresh. Growing snap beans provides farmers with a versatile crop for fresh and processed markets, enhancing farm income.

stem eelworm: a pest affecting cereals, in particular oats. The plant stem swells and is prevented from growing and producing any ears. Managing stem eelworm populations protects crops from damage, ensuring healthy growth and better yields.

straw walker: the part of a combine harvester where straw is carried away from the threshed grain after it has been separated from the stalks. Properly managing straw walkers ensures efficient combine harvester operation and crop quality.

suckler: a calf or other young animal which is suckling. Properly managing sucklers ensures healthy growth and development, supporting livestock productivity and farm profitability.

shifting cultivation: An agricultural practice using the rotation of fields rather than of crops. Short cropping periods are followed by long fallows and fertility is maintained by the regeneration of vegetation. A form of cultivation practised in some tropical countries, where land is cultivated until it is exhausted and then left as the farmers move on to another area. In shifting cultivation, the practice of clearing vegetation by burning is widespread. One of the simplest forms involves burning off thick and dry secondary vegetation. Immediately after burning, a crop like maize is planted and matures before the secondary vegetation has recovered. Where fire clearance methods are used, the ash acts as a fertiliser. Farmers benefit from understanding and managing shifting cultivation for sustainable land use and productivity.

salivary gland: A gland which secretes saliva. Farmers benefit from understanding the function of salivary glands to maintain the digestive health of their livestock.

sweetener: an artificial substance such as saccharin added to food to make it sweet. Properly managing sweeteners ensures product quality and consumer health, supporting market value and farm profitability.

staple crop: A crop that is grown in large quantities and forms the basis of a traditional diet. Understanding staple crops helps farmers meet food security needs.

silty soil: Soil containing a high proportion of silt. Such soils are difficult to work and drainage is a problem. Farmers benefit from managing silty soils to improve drainage and soil structure.