Question

a chemical use to making the soil fertile​

Answer 1

Answer:

Fertilizer is the right answer

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Answer 2

Answer:

rea,Indole-3-acetic acid,And Nitrogenous compounds like nitrate,nitrite,somehow ammonia

Explanation:

Usually a fertile soil will also have some organic matter that improves soil structure, soil moisture retention, and also nutrient retention, and a pH between 6 and 7. ... They focus on using commercial fertilizers, manures, waste products, and composts to add nutrients and organic matter to the soil.