用自然肥料是好的。
废弃物可以丢入堆肥箱进行自然分解逐渐形成土壤和液体肥料。
Waste drops into the compost where it is naturally processed into soil and liquid fertilizer over time.
由于这些耕作体系里已经引入病虫害联合防护体系，那些肥料和农药的需求量也就自然减少了。
And since they have those safeguards built into their farming system, they have less need for fertilizers and pesticides.
图中展示的是从藻床中取下的自然绿色海藻，海藻可以有效地分离出水源中的氮和磷，用完之后自身转化为有机肥料还可以进一步利用。
Nature's Green Cleaner Air-dried algae (shown above) from an algal turf scrubber captured most of the nitrogen and phosphorus in the manure.
这个过程在1956年本来可以自然开始的，那时在位于密克罗尼西亚的吉尔伯特群岛上英国管理部门对出口用作肥料的磷酸盐-鸟的粪肥-强制增税。
That process may have started inadvertently in 1956 when the British administration of the Gilbert Islands in Micronesia put a levy on the export of phosphates-bird manure-used in fertiliser.
可是光靠自然界的力量太慢了，能不能把石头直接捣碎研磨成粉末，再加上农家肥料用来种植庄稼。
But it was too slow to change rocks into soil by the energy in nature. He wondered if he could make soil by grounding the rocks into powder and adding farmyard manure to grow crops.
可是光靠自然界的力量太慢了，能不能把石头直接捣碎研磨成粉末，再加上农家肥料用来种植庄稼。
But it was too slow to change rocks into soil by the energy in nature. He wondered if he could make soil by grounding the rocks into powder and adding farmyard manure to grow crops.
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