A study in Niger looked at how to improve millet growth by using manure and fertilizer more effectively. They found that applying manure before planting increased millet grain yield by 16-20% and nitrogen utilization by 25-31%. Adding mineral fertilizer also boosted grain yield by 5-57%. This shows that applying manure before planting can help meet millet's nutrient needs, leading to better crop growth and higher yields under zai pits.