Nitrogen Fertilization of Maize at Varying Population Densities

Date

11-1971

Degree

Bachelor of Science in Agriculture

Major Course

Major in Agronomy

College

College of Agriculture and Food Science (CAFS)

Adviser/Committee Chair

Antonio C. Mercado, Jr.

Abstract

The influence of nitrogen and varying population densities on yield and other agronomic characters of UPCA VAR-2, -4, and Tiniguib was studied in two separate seasons, from October 1969 dry season, to September 1970 wet season, at the UPCA Central Experimental Station.

Grain yield, plant height, ear height and leaf area index increased with increasing nitrogen rates and population densities. However, maximum yields and optimum LAI for UPCA VAR-2 and -4 were obtained at 60,000 plants per hectare and at 100 kg N per hectare.

Nitrogen rate x population density, nitrogen rate a variety, and population density x variety interactions on grain yield were highly significant. These may be primarily due to the differential response of the native and recommended varieties to nitrogen rate and population density. Tiniguib responded slightly to added nitrogen fertilizer but was largely affected by increased seeding rate. UPCA VAR-2 and -4, on the other hand, responded markedly to added nitrogen fertilizer; the optimum population density was 60,000 plants per hectare.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 1971 A42 P33

Document Type

Thesis

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