1- Beneficial insects are important in agriculture because they kill bugs that are bad to crops, they help with the earth's soil such as earth worms providing nutrient in their waste, and they also polinate crops which help them to grow.
2- Same insects are not always beneficially in different systems this is because they ruin some crops for example the cabbage butterfly babies, they eat the cabbage but the butterfly polinates it.
3-  Yield potential is how much your plant produces and you can maximize this by making sure your plant your plant gets enough water, sunlight, etc. Basically taking care of it good so that it grows strong.

1- Soil and water conservation is important  because without  the two you would not have the building blocks to grow anything. Soil is important because soil gives the plant the nutrients it needs in order to grow. Water is important because it provides moisture to the plant without it drying out and essentially dying.
2- Framers use cover crops in order to keep soil from what is called soil runoff were soil is washed away and flushed into the ocean which kills off the reefs and pollutes the sea. They also use cover crops to keep the soil compact and for it to be able to keep the soil to grow other crops. The cover crops help Hawaiis Ahapua`a because it distinctively shows where each land division is, without cover crops the land will be washed away and into the sea.

​1) The soil is important for the plants because that is where they get their nutrients  and food to help them grow  and healthier plants or crops. Water conservation is important  to manage the water as a sustainable  resources and to protect the water environment  for human needs for everyday living. 
2) The reason why people and farmers plants cover crops is because it helps reduce heavy water flows when it rains and lead  to dirty water and ruin the soil nutrients. The roots on the plants impact together the soil leading to a somewhat clean water. Prevent to loss the nutrients  and to keep  the soil in one place to hold the nutrients. 
They help the Hawaii Ahupua'a by reducing the soil erosion going to other place like river or beach. 
3) Three career  in agriculture that I know are plant pathology, soil scientist  and conservation  specialist 

Attachments area

This is a water shed model it tells you what will happen if it got heavy rain where would all the soil and other stuff will end up after the heavy rain.