Changli Institute of Pomology Hebei Academy of Agriculture and Forestry Sciences Changli 066600 China;
Changli Institute of Pomology Hebei Academy of Agriculture and Forestry Sciences Changli 066600 China;
Changli Institute of Pomology Hebei Academy of Agriculture and Forestry Sciences Changli 066600 China;
Changli Institute of Pomology Hebei Academy of Agriculture and Forestry Sciences Changli 066600 China;
Changli Institute of Pomology Hebei Academy of Agriculture and Forestry Sciences Changli 066600 China;
Changli Institute of Pomology Hebei Academy of Agriculture and Forestry Sciences Changli 066600 China;
Changli Institute of Pomology Hebei Academy of Agriculture and Forestry Sciences Changli 066600 China;
Organic nitrogen components; Profile; Apple-pear orchard soil; Distribution characteristics;