The paper discusses the theoretical predictions for the cross-sections of squark and gluino production at hadron colliders, specifically at the Tevatron and the LHC. The authors determine these predictions at next-to-leading order (NLO) in supersymmetric QCD (SUSY-QCD), reducing the dependence on the renormalization/factorization scale. This reduction leads to more stable predictions, which can help reduce the errors in extracting the masses of squarks and gluinos from experimental data. The cross-sections increase significantly when NLO corrections are included, leading to improved lower bounds on the masses. However, the shape of the transverse momentum and rapidity distributions remains largely unchanged. The paper also reviews the lowest-order processes of squark and gluino production and provides a systematic analysis of NLO SUSY-QCD corrections for all possible supersymmetric pair channels. The renormalization of UV divergences and the treatment of real-gluon radiation are discussed in detail, with the aim of obtaining UV-finite cross-sections.The paper discusses the theoretical predictions for the cross-sections of squark and gluino production at hadron colliders, specifically at the Tevatron and the LHC. The authors determine these predictions at next-to-leading order (NLO) in supersymmetric QCD (SUSY-QCD), reducing the dependence on the renormalization/factorization scale. This reduction leads to more stable predictions, which can help reduce the errors in extracting the masses of squarks and gluinos from experimental data. The cross-sections increase significantly when NLO corrections are included, leading to improved lower bounds on the masses. However, the shape of the transverse momentum and rapidity distributions remains largely unchanged. The paper also reviews the lowest-order processes of squark and gluino production and provides a systematic analysis of NLO SUSY-QCD corrections for all possible supersymmetric pair channels. The renormalization of UV divergences and the treatment of real-gluon radiation are discussed in detail, with the aim of obtaining UV-finite cross-sections.