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53 с о 11 I. D. The study of primordial buds and the reaction of roots to defolia­

tion as the basis of grassland management, 1956.

S n o w R. Correlative inhibition of the growth of axillary buds. Ann. Bot. 39,

1925.

. - Sp r a gu e H. B. Utilisation of nutrients by colonial bent (Agrostis tenuis) and

Kentucky bluegrass (Poa pratensis). Bull. 570. New Jersey Agric. Exp. Sta.,

1934.

: S p r a g u e V. G. The effect of temperature and day length on seedling^ emer­

gence and early growth of several pasture species. Proc. Soil Sci. Soc.

Amer.

8

, Г944.

S t a p

1

e d о n R. G., M i 11о n W. E. The effect of different cutting and manu-

rial treatments on the tiller and root development of cocksfoot.

Welsch.

Journ. Agric. VI, 1930.

;S t a p

1

e d о n R. G., D a v i s N. Experiment to test the yield and other proper­

ties of various species and strains of herbage plant under different methods

of management. Welsch. Plant. Breed. Sta.,, 1930.

' S t o d d a r t I. How long do roots of grasses live? Science, 81, 1935'.

S t u c k e y I. H. Seasonal growth of grass roots. Amer. Journ. Bot. 28,

6

, 1941.

:S t u г к i e D. C. The influence of various top cutting treatments on root stocks

of Johnson grass Sorghum halapense) J. Amer. Soc. Agron.

22

, 1930.

S u l l i v a n J. T., S p r a g u e V. G. Composition of the roots and stuble of

perennial ryegrass following partial defoliation. Plant Physiol. 18, 1943.

:S u 11 i v a n J. T., S p r a g u e V. G. Reserve carbohydrates in orchard grass cut

for hay. Plant Physiol. 28,

2

, 1953.

. ' Su l l i v a n J. T., S p r a g u e V.G. The effect of temperature on the growth and

composition of the stuble and roots of perennial ryegrass. Plant Physiol,

24, 1949.

:S u n d I. M., W r i g h t M. I., Z e h n e г С. E., Ah l g г e n H. L. Comparation

of the productivity of permanent and rotation pastures on plowable cropland,

Second Six-year cycle and summary. Agr. Journ., 50, 10, 1958.

:S у 1v e n Ni l s . Der Einfluss der Schnittzeiten auf die Leistungsfahigkeit und

Winterfestigkeit der Luzerne. Verhandlungsbericht des III griinland Kong-

• ress des Nord-und Mitteleuropeischen Lander in der Sweiz. 1934.

T h a i n e R., H e i n r i c h s D. H. The effect of clipping frequency on the pro­

ductivity and root development of Russian wild rye (Elymus junceus Fisch)

in the greenhouse. Sci. Agrikulture. Agr. Inst, of Canada, 37, 7, 1951.

Г h i m a n n R. V., S с о о g F. On the inhibition of bud development and other

functions of growth substance in Vicia faba. Proc. Roy. Soc. 114, 1934.

(Her. abs).

T i n с к e r H. The effect of cuting to the ground level upon the growth of establi­

shed plants of Dactylis glomerata and Phleum pratense. Welsch. Journ.

Agric.

6

, 1930.

T r o u g h t o n A r t h u r M. Sc. The underground organs of herbage grasses.

Bull. 44, 1957.

W a t e r s H. I. Studies of the timothy plant. Part I, Univer. of Miss. Agr. Exp.

Sta., 19, Г915.

W a t к i n s J. M. The growth habits and chemical composition of bromegrass

(Bromus inermis Leyss) as affected by different enviromental conditions.

Jour. Am. Soc. Agr., 32, 1940.

W e a v e r J. E. and Z i n k E. Annual increase of underground materials, on

three range grasses. Ecology 27, 1946 a.

W e a v e r J. E. and Z i n k E, Lenght of life of roots of ten species of perennial

range and pasture grasses. Plant Physiol. 21. 1946 b.

W e a v e r J. E., Z i n k Ellen. Extent and longevity of the seminal roots of

certain grasses. Plant. Physiol., 20, 1945.

We i n m a n n H. Underground development and reserves of grasses. J. Brit.

Grassl. Soc. 3, 1948.

364

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