Proceedings :: North Central Soil Fertility Conference

Proceedings

Find matching any: Reset

McCauley, W.M

Breker, J

Meyers, D.B

» Add more authors

Add filter to result:

Authors

Franzen, D

Sharma, L

Bu, H

Schultz, E

Breker, J

Denton, A

Wyciskala, T.D

Varsa, E.C

Chong, S.K

Ebelhar, S.A

Indorante, S.J

McCauley, W.M

Robertson, G.K

Ebelhar, S.A

Wyciskalla, T.D

Varsa, E.C

Chong, S.K

Indorante, S.J

McCauley, W.M

Meyers, D.B

Kitchen, N.R

Sudduth, K.A

Sadler, E.J

Miles, R.J

Grunwald, S

Topics

Type

Oral

Year

2016

2000

2012

Home » Authors » Results

Authors

Filter results4 paper(s) found.
1. Independence of Crop Yield and Nitrogen Rate Across Sites Historically soil fertility specialists in the North Central States of the USA have constructed nitrogen (N) rate recommendations based on ‘yield goals’ or ‘expected yield’. Within the past ten years, there has been a general realization by soil fertility researchers that within a site or field there is a relationship between N rate and yield; however, because of soil and weather differences between sites there is no relationship in N rate studies with a large number of... D. Franzen, L. Sharma, H. Bu, E. Schultz, J. Breker, A. Denton Download paper
2. Soil and Site Factors Responsible for Yield Variations in Two Southern Illinois Farm Fields Yield variability within a field is largely influenced by the soil physical. chemical. and topographic features of that field. On-farm field research studies were conducted from 1997 through 1999 on two southern Illinois farm fields (one in Jefferson County and the other in Pope County) with varying soil physical, chemical, and topographic features to determine which factors most influenced crop yield variability. Each location was GPS-gridded utilizing a grid cell size of 0.45 acres. Detailed topographic... Download paper
3. The Influence of Variably Applied Potassium Fertilizer on Yield Variations in Two Southern Illinois Farm Fields The basis of Variable Rate Technology (VRT) is to apply nutrients where they are needed and to reduce the application of nutrients where they are not needed. However, there is considerable uncertainty as to whether the variable application of nutrients to farmers fields should be on the basis of soil test levels or yield potentials. A field study was conducted at two locations in southern Illinois from 1997 to 1999 to evaluate VRT as a management tool for corn and soybean production on fields with... Download paper
4. Response Surface Models Of Subsoil K Concentration For Loess Over Till Soils In Missouri Crop uptake of potassium (K) has demonstrated sensitivity to subsoil variation in K content. This fact has not been sufficiently considered in K management strategies in part due to logistical difficulties in sampling spatially variable subsoil K. We propose a simplified soil factorial model, a response surface, to enable site-specific accounting of whole root zone K supply for loess over till soils. We compared the performance of two peak functions and a non-parametric local regression procedure... Download paper

Filter results4 paper(s) found.

1. Independence of Crop Yield and Nitrogen Rate Across Sites

Historically soil fertility specialists in the North Central States of the USA have constructed nitrogen (N) rate recommendations based on ‘yield goals’ or ‘expected yield’. Within the past ten years, there has been a general realization by soil fertility researchers that within a site or field there is a relationship between N rate and yield; however, because of soil and weather differences between sites there is no relationship in N rate studies with a large number of... D. Franzen, L. Sharma, H. Bu, E. Schultz, J. Breker, A. Denton

Download paper

2. Soil and Site Factors Responsible for Yield Variations in Two Southern Illinois Farm Fields

Yield variability within a field is largely influenced by the soil physical. chemical. and topographic features of that field. On-farm field research studies were conducted from 1997 through 1999 on two southern Illinois farm fields (one in Jefferson County and the other in Pope County) with varying soil physical, chemical, and topographic features to determine which factors most influenced crop yield variability. Each location was GPS-gridded utilizing a grid cell size of 0.45 acres. Detailed topographic...

Download paper

3. The Influence of Variably Applied Potassium Fertilizer on Yield Variations in Two Southern Illinois Farm Fields

The basis of Variable Rate Technology (VRT) is to apply nutrients where they are needed and to reduce the application of nutrients where they are not needed. However, there is considerable uncertainty as to whether the variable application of nutrients to farmers fields should be on the basis of soil test levels or yield potentials. A field study was conducted at two locations in southern Illinois from 1997 to 1999 to evaluate VRT as a management tool for corn and soybean production on fields with...

Download paper

4. Response Surface Models Of Subsoil K Concentration For Loess Over Till Soils In Missouri

Crop uptake of potassium (K) has demonstrated sensitivity to subsoil variation in K content. This fact has not been sufficiently considered in K management strategies in part due to logistical difficulties in sampling spatially variable subsoil K. We propose a simplified soil factorial model, a response surface, to enable site-specific accounting of whole root zone K supply for loess over till soils. We compared the performance of two peak functions and a non-parametric local regression procedure...

Download paper