Document Type

Thesis - Open Access

Award Date

1973

Degree Name

Master of Science (MS)

Department

Agricultural Engineering

Abstract

Livestock waste is becoming a problem in the area of pollution. About 2 billion tons of animal waste are produced each year in this country. Many farmyards and feedlots have allowed the waste to be washed into nearby streams, polluting them. Large commercial livestock feeding operations have such a large amount of waste causing pollution that steps have been taken by the government to keep large scale feedlots from becoming pollution hazards. Many of these methods of use and disposal are in the development stage. However, livestock wastes cannot be allowed to accumulate while new methods are being developed. The traditional method of manure disposal is to haul the manure to the field as a source of fertilizer and incorporate it with the soil since manure contains nutrients that can be utilized on land to help produce crops. This would help keep manure from polluting streams. Because soil has the potential of being the primary disposal media of manure in the future it would be advantageous to know if manure incorporated in a soil will change the physical strength characteristics of the soil and the work necessary to till the soil. If heavily manured. Soil requires an appreciable increase in the amount of energy necessary for tillage it may not be economical to apply large amounts of manure. But if manure reduces the tillage energy required it would be an asset. Soil strength characteristics and tillage are interrelated so they should be studied and analyzed together. The purpose of this research work was to acquire data for de-termination of any changes in the soil strength properties and any variation in the amount of work necessary to till the soil.

Library of Congress Subject Headings

Fertilizers

Animal waste

Tillage

South Dakota State University Theses

Format

application/pdf

Number of Pages

105

Publisher

South Dakota State University

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