Studies on direct seeding of tropical rice. II. yield response of early-maturing improved rice varieties to direct seeding under two levels of soil fertility

Date

4-1969

Degree

Bachelor of Science in Agriculture

Major Course

Major in Agronomy

College

College of Agriculture and Food Science (CAFS)

Adviser/Committee Chair

Basilio B. Mabbayad

Abstract

Statistical analysis of the results showed that the grain yield, number of grains per panicle and panicle wei1ht were significantly affected by the nitrogen fertilizer levels and planting methods. In the wet season, higher grain yield was obtained from the shorter statured and higher tillering variety, like nt.i3(68), than fray the taller and medium tillering varieties like G4-113. At low nitrogen fertilizer level, the taller varieties yielded more grains than the short statured ones. The effects of planting methods were not consistent in both planting seasons although results tended to show that the drilled method at 88 kg./ha. seed rate was better than the 66 kg./ha. seed rate in the dry season. The better method was, however, much better at high nitrogen level in the wet season. in comparison, the trans-planted crop showed better performance at low level of nitrogen fertilizer particularly during the dry season. It was also noted that the medium statured varieties with spreading leaf arrangement gave lighter panicles but more number of filled grains in the wet season. In the dry season, the short statured variety gave heavier panicles but lower number of grain. The taller varieties had longer panicles. On the other hand, IH-8(68) which is a short-statured variety yielded few ,rains in the wet season at any level of nitrogen fertilizer.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 1969 A42 S24

Document Type

Thesis

This document is currently not available here.

Share

COinS