Nitrogen use efficiency of summer maize was significantly increased with urea containing different urease inhibitor concentrations compared with normal urea.

EC 3.5.1.5 (urease) inhibitor · nutrient: efficiency · Zea mays (maize)Positive and negative results

1 paper in the same direction as this claim · 2 in the opposite direction

1. no effect
   Urease inhibitors combined with humic substances in treated urea did not improve maize nitrogen use efficiency during vegetative stages.

   ¹⁵ N-Urea Efficiency in Maize as Influenced by Humic Substances and Urease Inhibitors Treatments · 2018

   Opposite direction

2. no effect
   Urease inhibitor did not affect corn grain yield, net economic return or agronomic efficiency.

   Comparing nitrogen timing and sidedressing placement strategies on corn growth and yield in Michigan · 2020

   Opposite direction

3. positive
   Grain nitrogen use efficiency increased by 7.1% with 80%U+UI versus CF.

   Adding NBPT to urea increases N use efficiency of maize and decreases the abundance of N-cycling soil microbes under reduced fertilizer-N rate on the North China Plain · 2020 · compared with CF

   Same direction

nitrogen · nutrient: efficiency · Zea mays (maize)Positive and negative results

141 papers in the same direction as this claim · 42 in the opposite direction · 10 reporting no difference from an alternative

1. negative
   NUE decreased with increasing N rate.

   Nitrogen Use Efficiency in Maize as Affected by Nitrogen Availability and Row Spacing · 2008

   Opposite direction

2. negative
   Higher N rates can reduce agronomic efficiency.

   Corn Yield and Foliar Diagnosis Affected by Nitrogen Fertilization and Inoculation with Azospirillum brasilense · 2016

   Opposite direction

3. no effect
   Nitrogen source did not significantly affect corn grain yields, residual nitrate or NFUE.

   Corn Response to Nitrogen Fertilization in a Soil with High Residual Nitrogen · 2005

   Opposite direction

4. negative
   Increasing nitrogen addition decreased nitrogen uptake efficiency in both years.

   Effect of nitrogen rate and fertilizer nitrogen source on physiology, yield, grain quality, and nitrogen use efficiency in corn · 2016

   Opposite direction

5. negative
   Nitrogen application beyond the optimal N rate decreased maize nitrogen use efficiencies (NUEs).

   Impact of Nitrogen Rate on Maize Yield and Nitrogen Use Efficiencies in Northeast China · 2014 · compared with optimal N rate

   Opposite direction

6. negative
   Nitrogen addition beyond the MERN decreased NUE and soil pH.

   Under‐ or Over‐Application of Nitrogen Impact Corn Yield, Quality, Soil, and Environment · 2016 · compared with MERN

   Opposite direction

7. no effect
   At low N application rates, crop yields and NUE did not significantly increase with manure substitution.

   Effect of replacing synthetic nitrogen fertilizer with animal manure on grain yield and nitrogen use efficiency in China: a meta‐analysis · 2023

   Opposite direction

8. negative
   Urea feeding strongly reduced nitrogen uptake efficiency relative to nitrate or ammonium feeding in maize.

   Urea Use Efficiency of Hydroponically Grown Maize and Wheat · 2008 · compared with nitrate or ammonium fed-plants

   Opposite direction

185 papers more in this group