The effect of between and within now spacing on soybean yield and its components.

Cao Van Nau

Date

5-1966

Degree

Bachelor of Science in Agriculture

Major Course

Major in Agronomy

College

College of Agriculture and Food Science (CAFS)

Adviser/Committee Chair

C. D. Molinyare

Abstract

Two soybean varieties, Improved Pelican and B.G. 5, were tested for two seasons at varying spacings between rows and hills set at two plants per hill. The former represented the tall and upright type; the latter, the tall and spreading.

In the dry-season trial, the seeds were planted late; hence, short day-length and lack of moisture suppressed the vegetative growth and induced early flowering in both varieties as a result, the yields were lower than those obtained in the wet-season planting.

Although no conclusive results can be obtained from this study, both varieties responded favorably to the 35 x 10 cm. spacing (571,428 plants per hectare) during the dry-season planting. This indicates that soybean can tolerate close spacing in the dry season.

In the wet-season trial, the spacing significantly affected seed yield. E. G. 5 gave significantly high yields at spacings of 50 x 30 cm. (133,332 plants per hectare) and 70 x 20 cm. (142, 856 plants per hectare); since the different, either the 70 x 20 or the 50 x 30 cm. spacing may be recommended. The recommended plant population for wet season was found to be around 130,000 to 140,000 plants per hectare for both varieties.

The components yield were also affected by the variation of spacings between and within rows. The soybean plants were found to be tall at close spacings but produced few branches, pod-bearing nodes and pods and light seed weight. However, with wider spacing, the plants were observed to be significantly shorter. Likewise, with increased spacing the plants of both varieties produced significantly more pods and heavier seeds.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 1966 A42 C36

Document Type

Thesis

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