Long Term Effects of Crop Rotations with Fallow or Groundnut on Soil Fertility and Succeeding Sorghum Yields in the Guinea Savannah of West Africa

The effects of crop rotations with fallow, groundnut (Arachis hypogea) and cotton (Gossypium sp) on soil and subsequent sorghum (Sorghum bicolour) yields were studied with a 14-years (1993–2007) old experiment at Farako-Ba (4° 20′ West, 11° 6′ North and 405 m altitude) in the Guinean z one of Burkina Faso. A factorial design in a split plot arrangement with four rotation and eight fertilizer treatments were used.

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