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Vergara - 1976 - Physiological and morphological adaptability of ri

Vergara - 1976 - Physiological and morphological adaptability of ri

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446 airs-tars AND RICE<br />

a technology the intbrmation obtained from sophisticated expe<strong>ri</strong>ments.<br />

Rice cultivation is an enterp<strong>ri</strong>se to produce <strong>ri</strong>ce through the growth process o1‘<br />

the plant under va<strong>ri</strong>ous environmental conditions. How to utilize the environmental<br />

resources at maximum efficiency is the issue in conside<strong>ri</strong>ng <strong>ri</strong>ce technology.<br />

Given reasonable supplies <strong>of</strong> water <strong>and</strong> fertilizers. solar radiation <strong>and</strong><br />

temperature are the major natural resources which control the productivity <strong>of</strong><br />

<strong>ri</strong>ce. Thus. growth manipulation should be designed to utilize these resources<br />

most efficiently.<br />

REFERENCES<br />

Cont; J. H.. <strong>and</strong> S. ‘YosHnm. I973. Photosynthesis, crop gmwth. <strong>and</strong> respiration <strong>of</strong> a tall <strong>and</strong> a<br />

short <strong>ri</strong>ce va<strong>ri</strong>eties. Soil Sci. Plant Nutr. 19:53-59.<br />

DE DATTA, S. K" <strong>and</strong> P. M. KARATE. I970. Environmental conditions afTecting the growth<br />

characte<strong>ri</strong>stics. nitrogen response, <strong>and</strong> grain yield <strong>of</strong> tropical <strong>ri</strong>ce. Biometcreology 4:71-89.<br />

ISHIZUKA. Y.. Y. SHIMAZAKI. A. TAMARA. T. SATARE. <strong>and</strong> T. NAKNFAIHA. 1973. Rice growing<br />

in a cool environment. Fl~'l'C. ASPAC. Taipei. 98 p.<br />

lSHlZlfKA, Y.. <strong>and</strong> .-'\. TANAKA. 1954. Biochemical studies <strong>of</strong> the life history <strong>of</strong> <strong>ri</strong>ec plant [in<br />

Japanese. English summary]. J. Sci. Soil Manure. Jpn. 25:163-168.<br />

ISHIZUKA, Y., <strong>and</strong> A. TANAKA. I956. Studies on ecological characte<strong>ri</strong>stics <strong>of</strong> <strong>ri</strong>ce plant grovrn<br />

in different localities. especially from st<strong>and</strong>point <strong>of</strong> the nut<strong>ri</strong>o-physiological character <strong>of</strong><br />

plant (Part 4]. Studies on physiological relationship between dying <strong>of</strong> lower leaves <strong>and</strong> the<br />

grain-straw ratio [in Japanese. English summary]. J. Sci. Soil Manure. Jpn. 27:145-148.<br />

JENNINGS. P. R.. <strong>and</strong> J. JESUS. I968. Studies on competition in <strong>ri</strong>ce. I. Competition in ntixtures<br />

ol‘ va<strong>ri</strong>eties. Evolution 22:119-124.<br />

KAWANQ. K.. <strong>and</strong> A. T.-\.\EAKA. 1967. Studies on the competitive ability <strong>of</strong> <strong>ri</strong>ce plant in population.<br />

J. Fae. Ag<strong>ri</strong>c. Hokkaido Llniv. 55:339-362.<br />

KAWANO, K.. <strong>and</strong> A. TAMARA. I968. Growth duration in relation to yield <strong>and</strong> nitrogen response<br />

in <strong>ri</strong>ce plant. Jpn. J. Breed. 18146-52.<br />

LLAX. L. I968. Growth performance <strong>and</strong> yield <strong>of</strong> the <strong>ri</strong>ce plants in the first <strong>and</strong> second crop<br />

seasons in Pingtllng area. Pages l-I9 m Soil <strong>and</strong> fertilizers in Taiwan.<br />

MURATA. ‘i’. I964. On the influence <strong>of</strong> solar radiation <strong>and</strong> air temperature upon the local difference<br />

in the productivity <strong>of</strong> paddy <strong>ri</strong>ce in Japan [in Japanese, English suntmary]. Proc.<br />

Crop Sci. Soc. Jpn. 33:59-63.<br />

OKA, ll. I.. II. .\‘lf)RlSHllt-!.~\. T. T. CHANG, <strong>and</strong> O. TAGLllt-‘IPAY. I970. Analysis <strong>of</strong> genetic va<strong>ri</strong>ations<br />

in plant type <strong>of</strong> <strong>ri</strong>ce. V. Early vs. sustained vigor types in growth <strong>and</strong> their breeding on yielding<br />

potential. Theoret. Appl. Genet. 40:50-55.<br />

SAMDTO. K. K. SUGIMOTO. VI. LTDA, <strong>and</strong> K. SUZUKI. 1959. Some considerations upon the<br />

reason <strong>of</strong> increase <strong>of</strong>‘ paniele number. in early Season cultivation <strong>of</strong> paddy <strong>ri</strong>ce [in Japanese.<br />

English stimmaryt]. Proc. Crop Sci. Soc. Jpn. 27:182-184.<br />

TANAKA. A. I972. The relative importance <strong>of</strong> the source <strong>and</strong> the sink as the yield limiting factors<br />

<strong>of</strong> <strong>ri</strong>ce. Food. Fertilizer Tech. Cent. Tech. Bull. 7.46 p.<br />

Taxatca. A“ K. KAIVANU, <strong>and</strong> J. Yatuaoucnt. 1966. Photosynthesis. respiration. <strong>and</strong> plant<br />

type <strong>of</strong> the tropical <strong>ri</strong>ce plant. Int. Rice Res. Inst. Tech. Bull. 7.46 p.<br />

'l‘.a.var;a. .:-\.. S. A. Navassno. C. V. GARCIA. F. ‘II PARAO. <strong>and</strong> E. RANIREZ. 1964. Growth<br />

habit <strong>of</strong> the <strong>ri</strong>ce plant in the tropics <strong>and</strong> its effect on nitrogen response. Int. Rice Res. Inst.<br />

Tech. Bull. 3. 80 p.<br />

TANAKA. .-\.. S. PATNAIK. <strong>and</strong> T. ABICHANDANI. 1959. Studies on the nut<strong>ri</strong>tion <strong>of</strong> <strong>ri</strong>ce plant<br />

(Orlttza saliva L). Part IV. Growth <strong>and</strong> nitrogen uptake <strong>of</strong> <strong>ri</strong>ce va<strong>ri</strong>eties <strong>of</strong> ditlierent duration.<br />

Proc. Indian itcad. Sci. 49:21? 226.

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