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Th is resented or tne degree of • g. c. in ield u b nury of the Univ rLJity of New al nd.
"H o TY ;
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(b)
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The J:'lunt oota 1crobi l ctiv1ty
Th YP ot Cover
i and ~ n r
Th • hosphoru in the oil The ~ot h in the oil
he mmoni nd itrat r1trog n 1n the ·oil The Or nic utter in the Soil
S ec1es nd Distribution '" rthworm .t'opul tion Se son l ctivi ty .
lts Ei'i'ect on oil Productivity
( ) Chemic lly and 1olog1c lly (b) hysically
l..J~L
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(b)
M t r1 l nd e thod
ggre t1on Under tur&
h ntluence
or
tb onThe V1 l Difference in
ti.on
t1on
TICS.
The o1d-Solu'ble and deorbed .. hosphorua 1n the oil
Speci l ppendixi- Ot the feet o~ Lime nd Super on the cid olubl Pno phoru nd pH of the 011.
T >ot h in the Soil
The n1 and NitP te 1trogen 1n th So1l The Or n1c tter 1n the Soil
(c)
-ter1 l nd ethod
etor rectin Nu er and eight of rt wor
aso l ct1v1ty
.i: ctore ec1 1 tr1but.ion rteet on oil ~ro uct1v1ty
( ) Cheml.c l
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