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
Recommended Citation
Salazar, Godofredo C., "Testing, evaluation, and modification of the IRRI 10-Row liquid chemical marker-injector" (1982). Graduate Student's Output. 2033.
https://www.ukdr.uplb.edu.ph/etd-grad/2033