Yoshida - 1981 - Fundamentals of Rice Crop Science

GROWTH AND DEVELOPMENT OF THE RICE PLANT 17
1.14. Nitrogen and starch content in lowland- and upland-grown rice seedlings
(Yamada and Ota 1957).
1.15. Rooting ability of rice seedlings raised in upland and lowland nurseries (variety: Norin 17;
45-day old seedlings) (Yatsuyanagi 1960).
tions, seedling quality may not have much effect on grain yield, as shown in Table
1.6.
In some parts of the Philippines, seedlings are raised by the dapog method.
Presoaked seeds are thickly spread on banana leaves to prevent contact with the
soil. Seeds can also be enclosed with wooden frames and spread on a concrete
floor. They are watered carefully and, in about 11 days, the thick mat is taken to
the field where the seedlings are separated and transplanted. In this method,
seedling growth is almost entirely dependent on the seed reserve.
1.4. LEAF
1.4.1. Morphology
A typical rice leaf is composed of the sheath, the blade, the ligule, and the auricles
(Fig. 1.16). The sheath is an elongated, ribbon-shaped leaf base rolled into a