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Organic waste of animal origin, commonly referred to as manure, has become a problem since the beginning of intensive pig farming. The objective of this study was to evaluate the productivity of soybean and maize crops subjected to the application of different doses of liquid pig manure (LPM). The treatments consisted of applying eight doses of pig manure to the second corn crop and seven doses to the soybean crop, plus a chemical treatment. Simple superphosphate and potassium chloride were used as chemical fertilisers. The phytotechnical characteristics evaluated in corn were hectolitre weight, thousand-grain weight, and grain productivity, and in soybeans, thousand-grain weight and estimated productivity. Pig manure has fertilising potential as a complement to chemicals in the crops tested. There were no chemical changes in the soil with only one application of pig manure in the fertilisation of the maize crop. In the first application, the dose of 350 m3 ha-1 of DLS provided higher productivity for the maize crop. After two applications, the dose of 233 m3 ha-1 of DLS provided higher productivity for the soybean crop.

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