Object

• soil: Basically, composting uses decaying organic material to fertilize the soil.

• ground: It is a memory of ancient bull sacrifice to fertilize the ground.

• field: That is to say the animals are fed on what is produced from the fields fertilized with manure.

Preposition: with

• seaweed: If it's turning yellow, fertilize with seaweed and green sand.

Modifying Another Word

• once: If you are going to fertilize only once or twice a year, get a slow release fertilizer.

• n't: If you choose to repot, do n't fertilize at the same time or the plant might go into shock.

• heavily: Chinese cabbage in Austria is heavily fertilized to produce big heads.

• not: If the egg was not fertilized, progesterone encourages the uterus to shed the lining, and the result is menstruation flow.

Preposition: by

• sperm: For conception to occur an egg has to meet and be fertilized by sperm, travel down to and implant in the uterus.