All experiments are managed with no-till techniques which allows us to maintain as much crop residue on the soil surface as possible. Cropping systems for each of the original sites in 1999. Wheat Wheat Sorghum 1999 Corn Corn Corn 2000 Austrian Winter Pea Austrian Winter Pea Soybean Table 2b. Cropping systems for the new sites in 1999. Annual yield fluctuations concern growers because they increase risk.
Stable yields translate into stable income levels in their operations.
Figure 4 provides a summary of 14 years' average yield history for wheat, corn, sorghum, and proso millet at our three study locations of Sterling, Stratton and Walsh. Wheat has been grown all 14 years at all sites, corn every year at Sterling, and sorghum every year at Walsh. Other crops have been grown for shorter periods of time. Grain yields averaged over soil position and 14 years of production for each location. Complete data for each crop are available in previously published bulletins.