Page 177 - Primary Five Science

a) Green manure. This is got from decayed green plants which

are buried in soil.

b)Compost manure. This is obtained from decayed household

refuse like left over foods, rubbish and other plant remains.

Advantages of Natural Fertilizer

 They improve soil texture

 They improve water retention in the soil

 They release nutrients slowly. it’s very difficult to over ferti-

lize (and harm) your plants. There’s little to no risk of toxic

buildups of chemicals and salts that can be deadly to plants.

 They stay longer in soil

 They are made from plants and animals which are less

harmful to the environment than chemicals.

 They are cheap. You can make your own organic fertilizer by

decomposing organic material or find inexpensive sources;

such as local dairy farms that may sell composted manure.

 Organic fertilizers are renewable, biodegradable, sustaina-

ble, and environmentally friendly.