a.
To describe: Sustainable agriculture.
Introduction: Agriculture is defined as the process of cultivating plants and livestock. In the soil, agriculture removes mineral nutrients, whereas fertilization replaces them. Commercially produced fertilizers, phosphorous, nitrogen, and potassium, quickly leach out from the soil and as a result, lakes and streams get polluted.
b.
To describe: N-P-K ratio.
Introduction: In general, the soil lacks essential nutrients that are required for the optimal growth of the plant. Plants require six essential nutrients, namely carbon, oxygen, nitrogen, hydrogen, potassium, and phosphorous. All fertilizer label may provide the information relating to the contents of its N-P-K and it is expressed as number ratio.
c.
To describe: The way how soil is associated with toxic aluminium ions (Al3+)?
Introduction: The productivity of the crop on acid soil is majorly affected by the aluminium (Al) toxicity. Plants grow in soil that has increased levels of toxic Al and may show symptoms of nutrient deficiency, like pale color and stunted growth.
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Study Guide for Campbell Biology
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