Soil humat application gave the highest available soil NPK content.

application · nutrient: content · Zea mays (maize)Positive and negative results

150 papers in the same direction as this claim · 9 in the opposite direction · 1 reporting no difference from an alternative

1. positive
   The combined 75% nitrogen rate and ascobein spray increased their uptake by grains and straw.

   The Effect of Spraying with Ascobein and Soil Addition of Nitrogen Fertilization on the Maize Crop in the Middle Delta · 2025

   Same directionCites this paper

2. no effect
   Spray timing did not affect plant-part nitrogen content relative to controls.

   Uptake, Distribution, and Remobilization of ¹⁵N‐labeled Urea Applied to Maize Canopies¹ · 1985 · compared with controls

   Opposite direction

3. no effect
   Humus did not significantly affect P and Ca uptake.

   Effects of soil applied humic substances to dry weight and mineral nutrients uptake of maize under calcareous soil conditions · 2008

   Opposite direction

4. no effect
   Low boron use and zinc solution spray did not affect grain boron uptake.

   Application of Different Levels of Zinc and Boron on Concentration and Uptake of Zinc and Boron in the Corn Grain · 2010

   Opposite direction

5. negative
   Osmotic stress before or during the absorption period reduced Rb absorption to 20% or less of controls.

   INFLUENCE OF MANNITOL ON ABSORPTION AND RETENTION OF RUBIDIUM BY EXCISED CORN ROOTS · 1973 · compared with controls

   Opposite direction

6. no effect
   Phosphite application number generally did not change phosphorus concentrations in corn grain, leaf and stem.

   Does phosphite, a reduced form of phosphate contribute to phosphorus nutrition in corn (Zea mays L.)? · 2019

   Opposite direction

7. negative
   Four foliar CaCl 2 applications increased shoot cadmium concentration relative to two.

   Effects of Ca on growth and some physiological characteristics of maize under Cd stress · 2001 · compared with foliar application CaCl 2 two times

   Opposite direction

8. no effect
   Leaf nutrient content did not differ before and after chelate application in either hybrid.

   Agronomic characteristics and management of diseases in maize with chelate-based products containing calcium, copper, manganese, and zinc · 2020 · compared with before

   Opposite direction

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