We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
No-tillage and nitrogen fertilization on soil chemical properties under dryland wheat-sorghum-fallow rotation.
- Authors
Obour, Augustine K.; Holman, Johnathon D.; Simon, Logan M.; Assefa, Yared
- Abstract
The main objective of the present study was to investigate changes in soil organic carbon (SOC), pH, as well as macro- and micronutrient concentrations in the top 0- to-5- and 5-to-15-cm soil depths under no-tillage (NT) and conventional tillage (CT) practices at different nitrogen (N) application rates. The soil analysis was conducted in 2019 and 2020 from CT and NT treatments from a long-term study conducted near Hays, KS, with N fertilizer rates of 0, 45, 90, and 134 kg N ha-1. Averaged across years, SOC in the top 0-to-5-cm soil depth under NT was 19% greater than that measured in CT, but SOC was not different between the two tillage practices in the 5-to-15-cm depth. The SOC concentration increased by 24-25% within the top 0-to-5-cm soil depth with increasing N rate from 0 to 90 or 134 kg N ha-1. Soil pH declined at rates of 0.004 and 0.007 for every kg ha-1 increase in N rate for CT and NT treatments within the 0-to-5-cm soil depth. Nitrate-N concentration under NT at the top 0-5 cm soilwas 55% more than CT but ammonium-N concentration was unaffected by tillage or N rate. Phosphorus (P), zinc (Zn), and iron (Fe) concentrations measured in the top 0-5 cm were 24, 34, and 33% greater in soils under NT compared with CT, respectively. Findings of the study suggest pH and SOC stratification in long-term NT systems can affect soil macro- and micronutrient concentrations and availability in dryland crop production systems.
- Subjects
FERTILIZERS; NO-tillage; NITROGEN in soils; CHEMICAL properties; SOIL testing; NITROGEN fertilizers; SOIL depth
- Publication
Agrosystems, Geosciences & Environment, 2023, Vol 6, Issue 1, p1
- Publication type
Article
- DOI
10.1002/agg2.20330