Extraction of the CowNflow dataset for the paper Animal-24-21504 by Ferreira et al.

This dataset represents the subset fo the CowNflow dataset used for determining nitrogen and truly digestible protein efficiencies of dairy cows fed fresh herbage- or maize forage-based diets though a meta-analysis (paper Animal-24-21504 by Ferreira et al.).本数据集为CowNflow数据集的子集，通过荟萃分析（Ferreira等人发表的论文Animal-24-21504），用于评估饲喂新鲜牧草或玉米饲草基础日粮的奶牛的氮与真可消化蛋白（truly digestible protein）利用效率。