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Some of the next articles are maybe not open access.
A Place to Start: Three Reasons to Participate in the NBPTS Project
Voices from the Middle, 1995openaire +1 more source
Influence of Humic Acid on the Effectiveness of NBPT in Different Types of Soils
Journal of Soil Science and Plant NutritionFurong Xiao +10 more
openaire +1 more source

