AGROVOC

Also called the walking tractor or hand tractor, two-wheel tractors have a forward mounted engine which is counter-balanced by the equipment attached behind the two drive wheels. The operator walks behind the tractor. (Adapted from IRRI. nd. The use of 2-wheel tractors. http://www.knowledgebank.irri.org/ericeproduction/Tractors/2wheel.htm)

A penetrometer is any device forced into the soil to measure resistance to vertical penetration. (Davidson, 1965. Penetrometer measurements. C.A. Black, D.D. Evans, L.E. Ensminger, J.L. White, F.E. Clark (Eds.), Methods of Soil Analysis. Part 1. Physical and Mineralogical Properties, Including Statistics of Measurement and Sampling, American Society of Agronomy, Madison, Wisconsin (1965), pp. 472-484)

Eliminating undulations on the soil surface. (Adapted from FAO, 2016. Save and Grow in Practice: Maize, Rice, Wheat. A Guide to Sustainable Cereal Production http://www.fao.org/3/a-i4009e.pdf Cited 14 April 2023.)

A prototype is an early sample, model, or release of a product built to test a concept or process. (https://en.wikipedia.org/wiki/Prototype)

A harrow with discs, typically used for heavy work, such as following ploughing to break up the sod. (BonaRes project)

Compressed between or under rollers. Rolling may entail tempering or conditioning. (Adapted from Tacon, A.G.J., 1987. The nutrition and feeding of farmed fish and shrimp - A training manual 2. Nutrient sources and composition. FAO Field Document. Project GCP/RLA/075/ITA, Field Document No. 5/E Brasilia, Brazil, 129 p. https://www.fao.org/4/ab468e/AB468E00.htm)