abstract: Modern technologies of production of crops should strive to optimise energy expenditure incurred for the cultivation of the soil. In justified cases, one can use the plate or reduce the soil treatments. Numerous studies show that potatoes and cereals should be fertilised with sulphur. In most of the Polish soils under agricultural use the quantity of sulphate sulphur does not exceed 25 mg kg-1 of soil and thus does not cover the demand of plants for this element. Because there are no studies on the impact of technology taking into account the effects of sulphur fertilisers on the production effects (yield) and on the economic viability and energy effectiveness of the production of potatoes and spring Triticale, appropriate studies have been undertaken. In the years 2006-2009, two three-year field experiments were conducted, involving the cultivation of potatoes (variety Irga) and spring Triticale (Vanad) under the conditions of the traditional and simplified cultivation of soil (without pre-winter ploughing), and with mineral NPK and NPK + S fertilisation. Sulphate sulphur at the dose of 50 kg S ha-1 (potassium sulphate) was applied under potatoes and 40 kg S ha-1 (ammonium sulphate) under spring Triticale. The experiments were carried out on a leached brown earth with loamy silty soil texture (clay - 13%), classified in the good rye-complex soil. Reaction of the soil was 5.2. The levels of phosphorus and potassium were average, and the content of magnesium and sulphur - low. The field experiments were conducted in a split plot design with four replications. The traditional cultivation with sulphur fertilisation had the best effect on the yield and quality of potato tubers (content and yield of starch, total protein and the content of sulphur and total nitrogen) and on the yield and quality of the grain of spring Triticale. The traditional cultivation and sulphur fertilisation had a favourable effect on the yield of the largest fractions of tubers (above 50 mm), while simplified soil tillage and NPK fertilisation favoured the development of the intermediate fractions, which may be used in the production of commercial tubers or seed potatoes. The use of traditional cultivation of soil and NPK + S fertilisation under potatoes and spring Triticale was economically justified, as it permitted the the best direct surplus and the highest energy efficiency index. The size of the direct surplus, in addition to the agrotechnical factors, was significantly influenced by the selling prices of crops and the direct payments. In the structure of the direct costs of production and energy input of both crop plants the largest share was that of harvesting and transport, seed potatoes, seeds and mineral fertilisers. Whereas, the share of soil cultivation in the costs of production was relatively small. The application of simplified soil tillage in potato and spring Triticale production may be justified for reasons of organisation.