Use of the experimental yield curve in fertilizer experiments.

Description Use of the experimental yield curve in fertilizer experiments. FB2

USE OF THE EXPONENTIAL YIELD CURVE Ö YIELD CURVE FOR A SINGLE VARIABLE GROWTH FACTOR The form of yield curve employed in this bulletin is known as the exponential yield curve. Its derivation and the reasons for preferring it are discussed later (p.

51). The curve assumes different shapes for different numbers of variable growth factors. Spillman, W. J., "Use of the Exponential Yield Curve in Fertilizer Experiments," Technical BulletinsUnited States Department of Agriculture, Economic.

1The method is explained in detail in Technical Bulletin"Use of the Exponential Yield Curve in Fertilizer Experiments," which Dr. Spillman brought to the stage of preparing the bulletin for print just before his death in The writer, who had discussed the early.

The use of yield curves in determining the profitability of fertilizer applications has been outlined and discussed. Needless to say, all facets of this subject have not been considered. A general review of the economics of fertilizer use has been presented by Nelson and Ibach ().Cited by: In most fertilizer experiments, a set of 4 to 5 levels of fertilizer plus a zero-fertilizer control is sufficient for most models.

Details Use of the experimental yield curve in fertilizer experiments. FB2

The results can be presented graphically by an equation or model. The model can be used to predict results if a second experiment similar to the first were conducted.

Fertilizer Application Yield Curve Nutrient Deficiency Soil Test Fertilizer Rate These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm by: 2.

Fertilizer Use and Crop Yields in the United States The National Soil and Fertilizer Research Com- mittee, recognizing the crucial relationship of fertilizers to our national welfare, charged the Fertilizer Work Group with the responsibility of (1) assembling and analyzing experimental data relating to the fertilizer requirements of crops and.

Download Use of the experimental yield curve in fertilizer experiments. FB2

The relation between fertilizer application rates and potential yield is schematically described in the following curve: This is the Yield Response to Fertilizer application curve.

Such curves are drawn based on many field trials. Explanation to the plot: When no fertilizer is applied, yield is at its minimum.