____________ agriculture – a form of farming involving the tilling, and cultivation of land by hand with a great deal of manual labor.

_____________ are important because they replace the soil nutrients removed by plants.

______________ are the three primary nutrients often in short supply are nitrogen, phosphorus, potassium.

___________ are Certain necessary elements in extremely small amounts

___________ are a chemical used to control or kill populations of unwanted fungi, animals or plants.

__________ – unwanted populations of fungi, animals or plants.

________ are unwanted plants.

__________ – Anything that that kills something living.

___________ ____________ is when the actual pest targeted.

_________ organisms – unintended killing of plant, animal or fungus by a pesticide.

________ is a synthetic plant-growth regulators that mimic natural-growth regulators

_____________- The process of accumulating higher and higher amounts of material inside the body of an animal.

_____________ – A chemical released by insects to attract a mate.

__________ engineering – is the insertion of DNA in an organism to give it traits that are desirable in the crop, such as insect resistance, or immune to Roundup herbicide.