Agriculture and industry Gauteng's agricultural sector is geared to provide the cities and towns of the province with fresh daily produce. This includes dairy products, vegetables, fruit, meat, eggs and flowers. A large area of the province falls within the so-called maize triangle. The districts of Bronkhorstspruit, Cullinan and Heidelberg are important agricultural land, where groundnuts, sunflowers, cotton and sorghum are produced. This summer-rainfall area enjoys hot summers and cold winters with frost.
Hail is common during the summer thunderstorms.
Snowfalls rarely occur. Gauteng is an integrated industrial complex with major areas of economic activity in five subregional areas, namely the Vaal Triangle, the East, West and Central Rand, and Pretoria. All these sectors rely heavily on the Vaal Dam on the Vaal River, from where water is piped across the province. Gauteng has a greater proportion of its labour force in professional, technical, managerial and executive positions than any other province. Its economic magnetism draws a large inflow of migrant labour from poorer regions in the country.