One‐Time Tillage of No‐Till: Effects on Nutrients, Mycorrhizae, and Phosphorus Uptake

• DOI: 10.2134/agronj2006.0261
• Publication Date: 2007-06-27T00:54:00Z
• Authors: J. P. Garcia; C. S. Wortmann; M. Mamo; R. Drijber; D. Tarkalson
• Keywords: Plough; Chisel; Conventional tillage

Stratification of nutrient availability, especially P, that develops with continuous no‐till (NT) can affect runoff concentration and possibly uptake. The effects composted manure application one‐time tillage NT on the distribution soil chemical properties, root colonization by arbuscular mycorrhizae (AM), plant P uptake were determined. Research was conducted Typic Argiudoll Mollic Hapludalf soils under rainfed corn ( Zea mays L.) or sorghum [ Sorghum bicolor (L.) Moench.] rotated soybean Glycine max Merr.] in eastern Nebraska. Tillage treatments included NT, disk, chisel, moldboard plow (MP), mini‐moldboard (MMP). Subplots had either 0 87.4 kg ha −1 applied compost before tillage. Bray‐P1 five to 21 times as high for 0‐ 5‐cm compared 10‐ 20‐cm depth. Greater redistribution nutrients incorporation resulted from MP than other treatments. One‐time chisel disk did not effectively redistribute while MMP an intermediate effect. Compost reduced AM roots at R6 all crops. reductions due 58 87%. effect persisted through second year no indication recovery. Root increased negatively correlated colonization. Decreased result decreased Infrequent reduce surface potential loss runoff, but may roots, reducing some low soils. results do indicate any advantage if is a concern.