REP50142

• Permit No: M1993041
• IBM Index Class Name: Report
• Doc Date: 5/26/1987
• Doc Name: DOWE FLATS AGRICULTURAL REPORT
• Media Type: D
• Archive: No

rruun~

The emaunC or annual replace•
meat varies with different greeeee.
But it ranges from 20 percenC to 60
percent of the total root system.
Yee, Indeed, IL's necessary that
these roots be replaced If the plant
is W remain healthy snd produc•
five.
In one comprehanelva..teet in
which the effecC of leaf removal on
root development .wee studied, it
was found that In all greeeee the'
amount of leaf volume removed
had s direct effect on the ¢rowth of
new roots.
All root growth stopped for 12
days when 80 percent o[ the leavee
were clipped. Removal ~ of 90
perceDC of the leavee etapoed.aLl'
root' growth for. 18.deye.
And, these roots didn't again
resume growth • until the Jpavee
were once again actively growing,
The: affects of repeated clippings
were much',ipore severe, tao,,and
the duratiop of rook'gTOwth etop:~
•paga was inaeeeed• (Contlnuedl:
How grazing affects root growth 'and plant health
~!
tl

•

10%,... ............... .... 0%'
20%• ..,..,..,....,...,.,,0%
30% ....' ........... ..........0%
40% ..............................0%
50% ................. 2-4%
'60%....... ......... ....... ij0%
0% 1896 •
,., ,.
80%...•,• ....... .......... .100% la«n~a, p~ae for
% .................:......... 100%
This taCla illuetratea the truth I~ the old saying, "Take half
and {save halt: 'Notice that as you grere off up to half the
leaves of your grass that root growth continues
unimpaired. But lust look al what happens when you try
to sneak in another lan percent "hsrveet": Hell the root
eIMMEHTAI ^HIlLD
growth le stopped:, At B0 percent root growth ;tope
completely-end at Ieeat 30 percent la rieeded annually.
to replete roots neturPlly pruned. Removing Q0 percenl
of the leaves ~ also atopa~~ root ~growth~ for l2-days.
Taking oft 90 oercan! stops root growth.lor~1B~~.days~
Percent leaf Percent root'
volume removed, growth stoppage