The Rate of Decomposition of Some Artificial Manures

Much interest has been manifested in the production of artificial manures since Hutchinson and Richards first suggested the process in 1921. They found that straw could be converted into a good grade of manure and also that if a proper proportion of the reagents and optimum moisture conditions were maintained, decomposition was very rapid. They recommended the addition to the straw of 14 pounds of nitrogen as ammonium sulfate, enough finely ground limestone to neutralize the acidity produced, and sufficient water to wet the straw and keep it moist

Some effects of method of application of fertilizers on corn and soils

These fertilizer experiments in the greenhouse and field gave the following results: 1. The 2-12-2 and 0-12-2 had a greater effect on the development of both the primary and secondary roots of corn than the 0-12-0. 2. Germination and root growth of corn were retarded when the fertilizers were applied in contact with the seed. 3. The desirable effects of fertilizers on the early growth, maturity and yield of corn appeared to be in proportion to the development of the roots of the plant. 4. The greatest development of both the primary and secondary roots was secured when the fertilizers were applied in the hill thoroly mixed with the soil in an area large enough to prevent any retardation of germination. 5. In greenhouse experiments the 2-12-2 and 0-12-2 applied in the hill mixed with the soil decreased the production of nitrates and lowered the nitrifying power of the soil for two weeks after the fertilizers were applied. 6. The retardation of germination of corn was not due entirely to the osmotic pressure of the salt solution. The elongation of cells and the rate of cell division was retarded by certain fertilizers independently of the osmotic influence

Further Studies on the Nitrate Assimilating Power of Soils

In a paper read at the meeting last year it was pointed out that when a soluble form of organic matter was added to soils which were incubated in tumblers, a considerable quantity of nitrate nitrogen could be used by the micro-organisms of the soil. The amount of nitrate nitrogen assimilated was in a measure determined by the amount of nitrate present at the beginning, the form and amount of organic matter used, and the length of incubation period. Two percent of straw furnished sufficient carbon for the assimilation of 10 mgm. per 100 gms. of soil in one week, and for about 15 mgm. in 3 weeks. Two percent of soluble starch or dextrose permitted the assimilation of about 15 mgm. in 1 week

Studies on Methods of Measuring the Nitrate Assimilating Power of Soils

The work of many investigators has demonstrated the fact that nitrate nitrogen disappears from soils to which organic materials of a high carbon-nitrogen ratio have been added. Doryland in 1916 claimed that soils have a definite nitrate consuming power and that additions of organic matter such as straw, dextrose, or other soluble sugars stimulated the disappearance of the nitrates. He attributed this disappearance to the fact that the nitrates were assimilated by microorganisms but not lost from the soil

How Missouri hogs are marketed

Cover title.Includes bibliographical references

Process of forming a plated wirepack with abrasive particles only in the cutting surface with a controlled kerf

A narrow wire blade with abrasive particles plated within a longitudinally-extending, plated cutting portion that extends from only one side of a wire core and has parallel side walls spaced by a controlled width

Multi-wafer slicing with a fixed abrasive

A wafering machine having a multiplicity of wire cutting blades supported by a bladehead reciprocally moving past a workpiece supported by a holder that rocks about an axis perpendicular to the wires at a frequency less than the reciprocation of the bladehead

Effect of Artificial Manure on Nitrification in Carrington Loam

The value of farmyard manure in maintaining soil fertility is well known. Recently, considerable interest has been manifested in a process of making artificial farmyard manure from straw and corn stalks. The process is still in the experimental stage and only a small amount of artificial manure is being produced. However, it seems desirable to study the effect of artificial manure compared with farmyard manure on soil conditions and crop yields. The purpose of this paper is to present some results secured on the effects of artificial manures, farm manure, green manures and crop residues on nitrification in Carrington loam

The Nitrate Assimilating Power of the Soil and Some Nitrate Assimilating Soil Bacteria

The utilization of such crop residues as wheat and oat straw presents a perplexing problem, especially to the grain farmer who would maintain the organic matter content of his soil. It has been generally observed that such materials added to the soil decrease the yields of the following crops

Lincoln and Hamilton 1861

The obverse of the medal features an embossed jugate image of Abraham Lincoln and Hannibal Hamlin inside a wreath. The medallion was sold by Chuck Hand, Paris, Illinois. Original number: Lot 1, K-26.https://scholarsjunction.msstate.edu/fvw-artifacts/3730/thumbnail.jp