He formulated 13 sound rules for the use of fertilizers.

Something should also be said about the use of water-soluble fertilizers.

There is no question that fertilizer use is one way to increase production.

He did experimental work on the use of fertilizers in dry and liquid form during the next several years.

The use of liquid fertilizers will be necessary when watering.

Agriculture was increased through use of commercial fertilizers and modern farming equipment.

The use of better fertilizers and seed strains became widespread.

It was not until June 8, he said, that scientists at the agency devised a plan for testing the use of fertilizers.

Excess plant material from production is recycled for internal fuel and fertilizer use.

After years of trending upward, fertilizer use slowed in 2008.