available nutrient的用法和样例：
例句
- The store of nutrients in the soil which is available to plants is an important constraint upon plant productivity.
土壤中植物有效养分的储存对于植物生长量是一个重要的制约因素。 - This paper studies the fertilization of gangue weathering matter centered around its serious deficiencies in organic active matter and available nutrients.
围绕煤矸石缺乏有机活性物质及有效养分的问题，在矸石山复垦种植时，对施肥作了试验研究。
