Cover crops and nitrogen fertilization effects on nitrogen soil fractions under corn cultivation in a no-tillage system

carbon (TC, Mg/ha), nitrate (N-NO3, mg/kg), ammonium (N-NH4, mg/kg), available phosphorus (P, mg/kg), and soil pH determined under the cover crop treatments (C, fallow control;

Re- duced tillage (HT and RT) with straw returned and rate of nitrogen (157.5 kg/ha for wheat and 202.5 kg/ha N for maize) were suitable to increase the yield and adjust the

For this purpose, certain parameters were measured, including soil total nitrogen (N), nitrate N, total phosphorus (P), available potassium (K)and the activities of the

KEYWORDS: Ammonium, Application rate, Corn, Corn yield, Cover crop, Critical growth stage, Fall applied anhydrous ammonium, Hypoxia, Illinois, Inorganic nitrogen, Mississippi

Above-ground biomass yields, nitrate and ammonium leaching, soil labile carbon (POX-C), soil potential mineralization of N (AnaN), and soil microbial activity (FDA) were

increase in nitrate nitrogen at the soil surface is probably the result of active mineralization of the organic matter of the manure under the effect of the mineral

Na mesma produtividade de grãos do feijoeiro, a quantidade necessária de N em cobertura é decrescen- te quando cultivado sobre as palhadas de milho em con- sórcio com

Fauna-induced litter decomposition and associated changes in soil organic carbon (SOC), total soil nitrogen (TSN), soil ammonium nitrogen (SAN), soil nitrate nitrogen (SNN) and