GENIUS TOY TAIWAN CO. LTD 7447-W85-B Manual De Usuario

To ensure proper plant growth soil must also have the 

correct soil chemistry. The two fundamental factors in 

soil chemistry are fertility and pH.

pH is a measure how acidic or basic a solution is. An acid is a 

substance that gives off hydrogen ions (H

+

) when dissolved in 

water. While bases are substances that give off hydroxide ions 

(OH

–

) when dissolved in water. You encounter many acids and bases 

every day. Vinegar and lemon are examples of acids, while baking 

soda and ammonia are bases.

The pH scale goes from 0 to 14. Values below 7 are acidic and 

values above 7 are basic. Pure water has a pH of 7, which is 

considered neutral — neither acidic or basic.

The pH of soil is measured by mixing the soil in water and using an 

The indicator changes color if it is placed in an acid or 

base. pH is important for plant growth and health because it 

influences many different chemical process. For example, pH 

affects the availability of different nutrients. The proper pH range 

for most plants is between 5.5 and 7.5.

The fertility is a measure of the nutrients available in 

soil, primarily the amount of nitrogen, phosphorus, and 

potassium or NPK. These three elements are vital to the 

growth of plants. You can often see the amount of NPK 

in fertilizers on their label.

A seeder sows seeds by me

tering out individual seed

s, 

placing them in the soil, and t

hen covering them up. A 

seeder ensures that the s

eeds are planted at the c

orrect 

depth and space from ea

ch other and ensures that t

hey 

are not eaten by birds. Th

e use of seeders makes sure t

hat 

more of the seeds grow into plant

s, increasing crop yield.