Effect of long-term N fertilization on soil organic C and total N in continuous wheat under conventional tillage in Oklahoma

Influence of long-term mineral fertilization on metal contents and properties of soil samples taken from different locations in Hesse, Germany

“…Increased plant biomass produced by fertilizers results in increased returns of organic material to the soil in the form of decaying roots, litter, and crop residues (Haynes and Naidu, 1998). Our results are similar with the findings of Raun et al (1998) and with the study of Halvorson et al (1999), who demonstrated a rise in C org with the applied increasing N ratios. Messiga et al (2013) noted a tendency of greater total carbon concentration with increasing N application.…”

Fertilization regimes affect the soil biological characteristics of a sudangrass and ryegrass rotation system

“…Similar results have already shown that SOM and total N increase with increasing N applied in continuous wheat under conventional tillage [48]. The benefits of bal-anced fertilization in maintaining SOM levels have been increasingly emphasized, and the increasing level of SOM due to proper fertilization regimes also means an improvement in soil fertility [42,49,50].…”

Effects of cattle manure compost combined with chemical fertilizer on topsoil organic matter, bulk density and earthworm activity in a wheat–maize rotation system in Eastern China

“…Nevertheless, still some argued that significant increases in organic carbon concentration or storage might also happen under chemical N fertilization alone management (Verma and Sharma, 2007;Olsson et al, 2005;Purakayastha et al, 2008). Those differences seem to mainly depend on the added N rate, the crop residue management and the tillage regime (Raun et al, 1998;Su et al, 2006).…”