when the acidity of soil increases, a. some nutrients are dissolved and washed away. b. the ph reaches levels as high as 7.0 to 9.0. c. the number of bacteria increases as well. d. both (a) and (b)

For a plant to develop and reproduce, it needs seventeen nutrients or components. They are iron (Fe), boron (B), manganese (Mn), copper (Cu), zinc (Zn), molybdenum (Mo), nickel (Ni), phosphorus (P), potassium (K), sulphur (S), calcium (Ca), magnesium (Mg), and chlorine (Cl) (Cl). The nutrients that plants need to complete their life cycle are referred to as vital nutrients. Non-essential nutrients are those that aid in plant growth but are not required to complete the life cycle of the plant. The nutrients originate from the mineral component of the soil, with the exception of nitrogen, which is provided by nitrogen fixation, and carbon, hydrogen, and oxygen, which are supplied by carbon dioxide and water, respectively. According to the Law of the Minimum, if a nutrient is not present in sufficient quantities in the soil solution, it prevents plants from utilizing other nutrients at their full potential. Thus, a certain nutrient ratio of the soil solution is necessary for optimum plant growth, a ratio that may differ from those derived from plant composition.

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