This chemical element is potassium (K).
potassium
The first element in the fourth period, which is used in making fertilizer, is potassium.
Nitrogen is.
Nitrogen.
The A is Potassium
The first element in the fourth period of the periodic table used in making fertilizers is potassium (K). Potassium is an essential nutrient for plant growth and is commonly found in fertilizers in the form of potassium chloride, potassium sulfate, or potassium nitrate. It plays a vital role in various physiological processes in plants, promoting strong root development and overall plant health.
Technetium is considered an extinct isotope, as is promethium. Their abundence is pretty much zero.
gypsum
Making up 5 percent of Earth's crust, iron is the fourth most abundant rock-forming element.
Sulfur
First you eat it...then you wait a bit...then it comes out the other end!!! There you have it...fertilizer!!
making fertile as by appliying fertilizer or manure.