Envirothon: 2019 Current Events

Approximately how long ago did the agricultural revolution begin?

Farmers are recommended to grow ___ the second year after a legume crop

Which of the following is not stable in soil due to no cation exchange capacity (- charge):

Which of the following "small grains" grows well in low nitrogen soil:

What has the ability to hold nutrients in the soil better than cation exchange?

Since 1945 ____% of GLOBAL cropland has become seriously degraded

Before planting a crop that needs high nitrogen, what type of cover crop is recommended?

What is the "traditional" plowing tillage called?

Which plant residue is best in NYS?

The max capacity of soil to store organic carbon is determined by...

For every 1% SOM increases, there is a __% increase in crop yield.

The number of soil organisms are ____ organic matter concentrations in upper 15 inches

If soil organisms are NOT present/active, then more ____ is needed

Cons to conservation tillage:

Pros to conservation tillage include all of the following EXCEPT:

What % of soil carbon content in surface layer has been lost since farming began?

Which particle type has a negative charge? (making cation exchange capacity more difficult)

How many people will be living in 2050? (31 years from now)

What concept has been developed for no-till farmers to decrease herbicide needs?

Increasing total soil organic carbon can decrease

Since 1945 it has been estimated (by UN) that ___ acres have suffered erosion

How do plants get the 16 other chemical elements (not carbon/oxygen) broken down?

Where did the agricultural revolution begin?

Which of the following is NOT rescued from leaching by chelates:

How much soil organic matter (SOM) is in agricultural topsoil?

Best bet against major pest outbreaks & soil fertility problems is

All of the options are "small grains." Which is most cold tolerant?

How deep into the soil is "organic matter" found?

All of the following are deeply rooted crops EXCEPT:

What is a big plus for choosing ridge tilling?