Recent research with annual crops such as wheat, sunflower and sorghum in the Great Plains region suggests that, compared to continuous cropping, soil quality, crop productivity and farm profitability are likely to be greater when crops are grown in a field only every second year with the soil keep free of weeds in the non-crop year by repeated cultivation of herbicide application.

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Recent research suggests that continuous cropping can improve soil quality and productivity compared to fallow systems, as fallow can lead to soil degradation and reduced organic matter.

Recent Research with Annual Crops Such as Wheat, Sunflower and Sorghum