BRAE 340 Midterm 2

The soil infiltration rate needs to be ____ than the application rate so that all of the water that is applied infiltrates and does not runoff the field

higher

The application rate of any irrigation system should always be

less than the infiltration rate of the soil

Water will only move down to lower layers after

upper layers have come to Field Capacity

Too much moisture in the root zone can cause '________' because insufficient oxygen is available to the roots

aeration problems

What is Pre-Irrigation

practice of watering a field before the crop is planted

Plants respond directly to what

tension with which water is held by the soil

Any micro irrigation system calls for what kind of MAD

relatively small

Remaining crops or situtations call for a relatively ___ MAD.

large

What is the soil matrix potential at PWP?

-15 bars

Consider sandy loam and clay soils The moisture tension at which crop relative transpiration begins to decline

at the same time for both soils