Nutrient Budget and Stratification in Long-Term No-till Soils.

Many crop production systems in the Southern Great Plains are adapting conservation tillage or no-till in place of conventional tillage. This study was conducted to determine if the distribution of nutrients under various winter and summer cropping systems differ in relationship to intensity of production. The effects of tillage system, crop species and production intensity on the soil profile distribution of nutrients was evaluated in Lahoma, OK on a Pond Creek silt loam (fine-silty, mixed, superactive, thermic Pachic Argiustoll). Soil samples from each plot were taken in three depth intervals from 0 to 30 cm and analyzed for pH and nutrient content. This data will provide insight into the potential need to change nutrient recommendations or sampling depths for no-till systems in the southern plains