Testing, evaluation, and modification of the IRRI 10-Row liquid chemical marker-injector

Date

1982

Abstract

Liquid Chemical Marker-Injector. Major Professor: Dr. Reynaldo M. Lantin. The metering device of the IRRI 10-row marker-injector was proven to have cyclic variation in the nozzle discharge when operated at its normal operating condition. Furthermore, nozzle discharge was greatly affected by the suction lift, at a lesser extent by the suction head, and not at all affected by the pressure head and the viscosity of the highest urea-water ratio mixture possible. Field performance tests of the machine gave a significant increase in rice yield when used for fertilizer deep placement. The modified metering device with more rigid construction provided a more uniform discharge per injection. Two machine configurations were evolved from the original design the 15-row marker-injector and the 10-row post transplant injector. A 5-row injector was mounted on the IRRI TR1 transplanter. A nomogram was constructed to aid in determining the required urea-water ratio for a given rate of fertilization, calibration rate and planting pattern.

Document Type

Master Thesis

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 995 1982 A2 S25

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