Fall applied nitrogen and slash pine (Irwin et al. 1998: SJAF)

• Fall treatments

• Control

• 150 lbs ammonium nitrate - Nov 15 50 lbs N/acre

• 150 lbs ammonium nitrate - Nov 15 150 lbs N/acre150 lbs ammonium nitrate - Nov 29 150 lbs ammonium nitrate - Dec 13 

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In one study, the effect of fall fertilization increased nutrient concentration….