Vergara - 1976 - Physiological and morphological adaptability of ri

470 CLIMATE AND RICE
tlviurata: By treating the NAR data with appropriate measures such as the ont I haw shown
in my report. we can estimate the net photosynthetic ability (not the actual value). which is
alwvays an imponant factor for dijv-matter production even with closed canopy stands.
A. T)\N.'\K.|‘\: l. Please comment on the significance oftop-dressing with nitrogen fertilizers in
increasing grain yield, in relation to Fig. S.
2. How about the solar radiation in this case‘?
3. Is there correlation between temperature and solar radiation?
Almura: 1. As this eajaeriment was carried out with sufficient nitrogen supply, I do not expect
much effect from top-dressing with nitrogen.
2. Roughly from about 350 to 550 cal-cm“ day“ (as regards Fig. '7).
3. 'l'here is. but very small.