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2. Labeling of fertilizer - Wikipedia

   en.wikipedia.org/wiki/Labeling_of_fertilizer

   Fertilizers with additional macronutrients (S, Ca, Mg) may add more numbers to the N-P-K ratio to indicate the amount. The additional numbers are similarly reported in the oxide mass fraction form. For example, a Polish fertilizer labeled "NPK (Ca,S) 4-12-12 (14-29)" has an equivalent of 14% soluble calcium oxide and 29% total sulfur trioxide. [6]

3. How to Care for an Indoor Fiddle Leaf Fig (And Actually Keep ...

   www.aol.com/care-indoor-fiddle-leaf-fig...

   During the growing season (March through September), feed your fiddle leaf monthly with a high-nitrogen plant food. An NPK (aka: nitrogen, phosphorus, and potassium) ratio of 16-5-11 works ...

4. How to Grow a Lemon Tree in a Pot: 12 Expert Tips for Success

   www.aol.com/grow-lemon-tree-pot-12-205500130.html

   Most fertilizers have an NPK ratio on the label that’s expressed in three numbers. The first number is the nitrogen, by weight, in the fertilizer. ... Related: The 6 Best Humidifiers for Plants ...

5. Plant nutrients in soil - Wikipedia

   en.wikipedia.org/wiki/Plant_nutrients_in_soil

   About 45% of a plant's dry mass is carbon; plant residues typically have a carbon to nitrogen ratio (C/N) of between 13:1 and 100:1. As the soil organic material is digested by micro-organisms and saprophagous soil fauna , the C/N decreases as the carbonaceous material is metabolized and carbon dioxide (CO 2 ) is released as a byproduct which ...

6. Neem cake - Wikipedia

   en.wikipedia.org/wiki/Neem_cake

   Neem cake has an adequate quantity of NPK in organic form for plant growth. Being a totally botanical product it contains 100% natural NPK content and other essential micro nutrients as N (Nitrogen 2.0% to 5.0%), P (Phosphorus 0.5% to 1.0%), K (Potassium 1.0% to 2.0%), Ca (Calcium 0.5% to 3.0%), Mg (Magnesium 0.3% to 1.0%), S (Sulphur 0.2% to 3.0%), Zn (Zinc 15 ppm to 60 ppm), Cu (Copper 4 ppm ...

7. Fertilizer - Wikipedia

   en.wikipedia.org/wiki/Fertilizer

   NPK ratings consist of three numbers separated by dashes (e.g., 10-10-10 or 16-4-8) describing the chemical content of fertilizers. [ 29 ] [ 30 ] The first number represents the percentage of nitrogen in the product; the second number, P 2 O 5 ; the third, K 2 O. Fertilizers do not actually contain P 2 O 5 or K 2 O, but the system is a ...