苗圃要广开肥源，常年积肥和种植绿肥。
The nursery should open fertilizer sources, manure and planting perennial green manure.
禽粪便同许多工业污染源不同，其中含有丰富的肥源。
Poultrymanure is different from many sources of industry pollution with its fertility.
传统农业时代广东地区山区和平原分别以获取灰粪和泥肥作为主要肥源。
During the time of traditional agriculture in Guangdong, the main manure source of mountainous areas was ash, while in the plains, the main manure source was the river filth.
传统农业时代广东地区山区和平原分别以获取灰粪和泥肥作为主要肥源。
During the time of traditional agriculture in Guangdong, the main manure source of mountainous areas was ash, while in the plains, the main manure source was the river filth.
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