1. Key points of walnut fertilization technology and evaluation of actual effect: This question highlights the core points of walnut fertilization technology and implies the evaluation of actual effect. This may arouse the interest of farmers, especially those who are trying to increase walnut production.

2. Farmers fertilizing walnuts: the combination of traditional methods and modern technology: This topic emphasizes the combination of traditional methods and modern technology when farmers fertilize walnuts. This may interest readers, especially those who are interested in agricultural technology and traditional agricultural methods.