Prospectives of monitoring biological activity in a red-legged partridge incubator with a carbon dioxide probe

This study focuses on the relationship between CO2 production and the ultimate hatchability of the incubation. A total amount of 43316 eggs of red-legged partridge (Alectoris rufa) were supervised during five actual incubations: three in 2012 and two in 2013. The CO2 concentration inside the incubator was monitored over a 20-day period, showing sigmoidal growth from ambient level (428 ppm) up to 1700 ppm in the incubation with the highest hatchability. Two sigmoid growth models (logistic and Gompertz) were used to describe the CO2 production by the eggs, with the result that the logistic model was a slightly better fit (r2=0.976 compared to r2=0.9746 for Gompertz). A coefficient of determination of 0.997 between the final CO2 estimation (ppm) using the logistic model and hatchability (%) was found.

Utilization of the waters of Mojave River, California /

"A contribution from Bureau of Agricultural Engineering."

Control of odors from anaerobic lagoons treating food processing waste-waters /

Issued July 1978.

Methods of orienting eggs.

"A special report submitted in the Silent Hoist and Crane Company materials handling contest."

A mathematical description of particle path in the forage blower.

"Submitted to Silent Hoist and Crane Company Committee on Materials Handling Prize."

Test of a refrigerator car equipped with dry ice system of refrigeration at Potomac Yards, Alexandria, Va., January 11-22, 1952.

Mode of access: Internet.

A test comparing dry ice and mechanical refrigeration in the transportation of frozen citrus concentrate by motortruck (an interim report)

Mode of access: Internet.

The rural efficiency guide,

Published 1917.

Priorities for local rural road improvements /

Mode of access: Internet.

Report.

"From Annual reports of the Department of Agriculture," 1900/01-1914/15.

ARS-42.

Some issues accompanied by supplements.

Soil erosion and its prevention ....

Mode of access: Internet.

Transactions.

Vol. 6- are 6th- Annual report.

Soil survey.

Title from cover.

Short course : location and evaluation of gravel sources for highway use /

"This short course has been prepared as a practical guide for town and county highway superintendents in New York State."