The percentage concentration of calcium found in single superphosphate fertilizer:
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Answer: C. 19.5%
Explanation
Single superphosphate fertilizer contains a guaranteed concentration of calcium along with its primary phosphorus content. The manufacturing process involves treating rock phosphate with sulfuric acid, which creates gypsum as a byproduct. This chemical reaction results in an end product containing approximately nineteen and a half percent calcium. Single superphosphate was one of the earliest chemical fertilizers developed for modern agricultural crop production. The fertilizer provides three essential plant nutrients including phosphorus, sulfur, and calcium in readily available forms. Phosphorus pentoxide makes up roughly twenty percent of the total weight in standard single superphosphate materials.
Knowing the exact nutrient breakdown allows farmers to calculate precise application rates for multi-nutrient fertilizer programs. Calcium from superphosphate contributes to soil structure stability while simultaneously feeding growing plant tissues. Fertilizer labeling standards require manufacturers to clearly state the guaranteed analysis of all constituent elements. Option A overestimates the typical calcium percentage found in standard commercial single superphosphate formulations. Option B provides an incorrect higher percentage that does not match standard fertilizer chemistry calculations. Option D represents a much higher nutrient concentration typical of more processed concentrated superphosphate fertilizers.
- Subject
- Agriculture
- Category
- Agriculture
- Topic
- —
- Difficulty
- medium
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