Zn-coated urea gave better grain and stover yields than soil application of Zn sulphate.

nitrogen · yield · Zea mays (maize)Positive and negative results

1,905 papers in the same direction as this claim · 234 in the opposite direction · 45 reporting no difference from an alternative

1. positive
   2.5% ZnCU raised grain yield by 9.9% over PU.

   RELATIVE PERFORMANCE OF BORON, SULPHUR AND ZINC COATINGS ONTO PRILLED UREA FOR INCREASING PRODUCTIVITY AND NITROGEN USE EFFICIENCY IN MAIZE · 2017 · compared with prilled urea (PU)

   Same directionCites this paper

2. negative
   Low nitrogen decreased maize grain yield.

   Within-Leaf Nitrogen Allocation in Adaptation to Low Nitrogen Supply in Maize during Grain-Filling Stage · 2016

   Opposite direction

3. no effect
   Nitrogen timing did not affect corn production in the other two years.

   Corn Production as Affected by Nitrogen Application Timing and Tillage · 2004

   Opposite direction

4. negative
   For the two years after 1992, losses were significantly higher for 134 kg N ha−1 on the clay loam.

   Nitrate Leaching and Nitrogen Budget as Affected by Maize Nitrogen Rate and Soil Type · 2000

   Opposite direction

5. negative
   Nitrogen stress reduced kernel number of maize in field conditions.

   Nitrogen Deficiency in Maize: II. Carbon‐Nitrogen Interaction Effects on Kernel Number and Grain Yield · 1995

   Opposite direction

6. no effect
   At high N rates, yields under the two tillage systems were approximately equal.

   Soil Nitrogen Availability after Long‐term Continuous No‐tillage and Conventional Tillage Corn Production · 1986

   Opposite direction

7. negative
   Pretreatment with inhibitors of NOS and nitrate reductase blocked the water stress-induced increase in NO production in maize.

   Nitric Oxide Reduces Hydrogen Peroxide Accumulation Involved in Water Stress‐induced Subcellular Anti‐oxidant Defense in Maize Plants · 2008

   Opposite direction

8. no effect
   Amending urea with KCI did not significantly change yield, ear-leaf nitrogen or nitrogen uptake in the tested year.

   Nitrogen Fertilizer Source, and Method and Time of Application Effects on No‐till Corn Yields and Nitrogen Uptakes¹ · 1986 · compared with unamended surface‐applied counterparts

   Opposite direction

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