Vergara - 1976 - Physiological and morphological adaptability of ri

YIELD AND YIELD COMPONENTS OF LO\\"L.=\1N'D RICE IN THE TROPICS 489
Appendlx. Climatic environment at Los Bahos, Phlllpplnes (14°N).
Temperature “O Solar radiation 1
Month Day-lengthl Max. Min. Mean Max-Min. | " Cm" 1131'"
January 12 o9 29 s. 21 2 25.3 e1 35B
February 12:24 30 2 20.5 25.4 9.6 432
March 12145 31.9 21.7 26.5 10.2 479
April 13:11 33.9 22.9 25.4 11.0 sea
May 13:33 34a 23.9 294 10.9 50o
June 13:44 33 2 23.8 28.5 9 4 442
July 1314B 31.9 23.6 27.8 8.3 402
August 1119 31.5 23.4 27.4 8.1 373
September 12:55 31 3 23.3 27.3 8.0 379
October 12:34 30.8 22 8 26.8 8.0 383
November 1212 29.9 22.4 26.1 7.5 317
December 12:04 29.2 22.1 25.7 7.1 295
' Every 15th day of the month, 1964. = 5-year average from 1966 to 197D, UPCA. 1 5-year average
from 1966 to 1970. lRRl.
REFERENCES
skoiuctrnruniu. Poucr STUDY COMMISSION. 1971. Technology of Japan No. 1 winners in rice
yield contest. Fuji Publishing Co. 234 p.
Ann. R.. H. SAVEAIMIIJRA. and S. Kouxo. 1959. Physiological studies on the mechanism of
crop plants. The etTect of the temperature upon the behavior of carbohydrates and related
enzymes during the ripening of rice plant. Proc. Crop Sci. Soc. Jpn. 27(4):405407.
ALLES, W. S. 1969. Drought incidence in relation to rainfed rice. Trop. Agric. 125137-44.
COCK, J. H. and S. YOSHIDA. 1973. Changing sink and source relations in rim (013120 sarrva
L.) using carbon dioxide enrichment in the field. Soil Sci. Plant Nutr. 19:229-234.
DE DATTA. S. KT. A. C. TAURU, and S. N. BALAOING. 1968. Effect of plant type and nitrogen
level on the growth characteristics and grain yield of indica rice in the tropics. Agron. J.
6U(6):643—646.
DE DATTA, S. K._ and P. 11/1. 7..-’\RATE. 1970. Environmental conditions afiecting the grovnh
characteristics. nitrogen response and grain yield of tropical rice. Biometeorology 4:71-89.
GANGOPADHYAYA. M.. and R. P. SARKER. 1965. Influence 01' rainfall distribution on the yield
of wheat crop. Agrie. Meteorol. 2331450.
HANYU. l. T. UtTHIJIMA. and S. SUGAWARA. 1966. Studies on the agroelimatological method
for expressing the paddy rice products. Part l. An agroclimatic index for expressing the
quantity of ripening of the paddy rice. Bull. Natl. Tohoku Agric. Exp. Stn. 34:27-36.
IITTAKA, N. I968. Experimental studies on the mechanisms of lodging and of its etfeirt on yield
in rice plants. Natl. Inst. Agric. Sci. Bull. A, 1511-175.
I-IITAKA, .\'.. and Y. OzAv-ta. 1970. Handbook of agricultural meteorology. Division of Research
Co-ordination, Ministry of Agriculture. ‘rbkendo Publishing Co. Tokyo. 397 p.
IRRI [Iarth RICE REs. [N811]. 1967. rtnnual report 1967. Los Bafios. Philippines. 308 p.
IRRJ [INT. RICE RES. INST]. 1968. Annual report 1968. Los Baiios. Philippines. 402 p.
IRRl [INT. RlcE RES. INST]. I970. Annual report 1969. Los Bafios. Philippines. 266 p.
IRRI [INT RICE REs. INST]. 1971. Annual report for 1970. Los Baflos. Philippines. 265 p.
IRRJ [1N'r. RICE RES. lxsr]. 1972. Annual report for 1971. Los Bafios. Philippines. 238 p.
IRR] [INT. RICE RES. INST]. I973. Annual report for 1972. Los Bafios. Philippines. 246 p.
IRRl [INT. RICE RES. INSL]. 1974. Annual report for 1973. Los Bafios. Philippines. 266 p.
Isuizuxii. Y.. Y. Sl-IIMAZAKI. A. TAMARA, T. SATAKE. and T. NAl-CAYAB-IA. 1973. Rice growing in
a cool environment. Food and Fertilizer Technology Center. ASPAC. Taipei. Taiwan.
Republic of China. 98 p.
IWAKI, S. 1956. Studies on the salt injury in rice plants. hlern. Ehime Llniv. Sec. 6 (Agrie)
211-156.