Re: Oil proportion of biodiesel.

Dean Hoffman wrote: 
Ed Earl Ross wrote:

Center pivot irrigation is limited to flat fields, and there are many. However, there are also many fields on rolling hills where a center pivot system cannot be used. 


    ??????????

One of the advantages pivots have over ditch irrigation is the ability
to irrigate rough ground. There is no need to level the land to make the
water flow. They can probably irrigate almost all farmable ground
if the pivot spans are short enough.
There are plenty of examples of this up in the Nebraska Sandhills.
Actually, there are a few within a few miles of my house that are on some
fairly rough ground.

Agreed, a center pivot for irrigation works on rolling hills. I should have said that center pivot *plowing* is limited to flat fields. Plowing a contour with a center pivot is impractical.

--
Humbly--Ed

"If the man doesn't believe as we do,
we say he is a crank, and that settles it.
I mean, it does nowadays, because now we
cant burn him."  (Mark Twain)
.