Proceedings :: North Central Soil Fertility Conference

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Gray, T

Johnson, S.W

Yang, H

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Authors

Murdock, L.W

Herbeck, J.H

Gray, T

Johnson, S.W

Buchoolz, D.D

Murdock, L.W

Bowley, C

Jones, S

Grove, J.H

Gray, T

Walters, D.T

Dobermann, A

Cassman, K.G

Drijber, R

Lindquist, J

Specht, J

Yang, H

Topics

Type

Oral

Year

1988

1994

2004

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Filter results4 paper(s) found.
1. High Yield Wheat Management Studies Interest in high yield wheat management (i.e. intensive wheat management) has increased in Kentucky during the last few years. This interest has been created because of the improved yield potential of newer soft red winter wheat varieties, high yields obtained in inten- sive wheat management research in other states, and the high yields being obtained in Europe with their intensive management inputs. In several of the European countries, average winter wheat yields of 70 bu/acre or higher are common... Download paper
2. Soybean Response to Potassium Rates and Placement Soils of northeast Missouri in heavy soybean producing counties have generally become depleted of available potassium. Reason for depletion can largely be pointed to soybean production and a general perception that soybeans do not respond to direct fertilizer application. With a significant portion of the soybean acres in east and northeast Missouri being tenant farmed, efficiency and utilization of direct fertilizer application by the current crop is even more important to the grower. Band application... Download paper
3. Nitrogen Recommendations for Wheat using the Chlorophyll Meter The use of a hand held chlorophyll meter showed good promise in helping to make N recommendations for wheat on a field basis. Using 5 site-years on well drained soils over a 2- year period, a correlation index (R2) of 0.88 was found relating the March (Feekes 5) N needed for optimum yield with a differential chlorophyll reading. Research on this method will be continued and expanded to field trials. Soils in less than a well drained class may require a separate calibration or the method may not be... Download paper
4. Changes in Nitrogen use Efficiency and Soil Quality After Five Years of Managing for High Yield Corn and Soybean Average corn gain yields in the USA have increased linearly at a rate of 1.7 bulacre over the past 35 years with a national yield average of 130 bdacre. Corn yield contest winners and simulation models, ho ~ever, indicate there is -100 bda in exploitable corn yield gap. Six years (1999-2004) of plant development, grain yield and nutrient uptake \yere compared in intensive irrigated maize systems representing (a) recommended best management practices for a yield goal of 200 bdacre (Ml) and (b) intensive... Download paper

Filter results4 paper(s) found.

1. High Yield Wheat Management Studies

Interest in high yield wheat management (i.e. intensive wheat management) has increased in Kentucky during the last few years. This interest has been created because of the improved yield potential of newer soft red winter wheat varieties, high yields obtained in inten- sive wheat management research in other states, and the high yields being obtained in Europe with their intensive management inputs. In several of the European countries, average winter wheat yields of 70 bu/acre or higher are common...

Download paper

2. Soybean Response to Potassium Rates and Placement

Soils of northeast Missouri in heavy soybean producing counties have generally become depleted of available potassium. Reason for depletion can largely be pointed to soybean production and a general perception that soybeans do not respond to direct fertilizer application. With a significant portion of the soybean acres in east and northeast Missouri being tenant farmed, efficiency and utilization of direct fertilizer application by the current crop is even more important to the grower. Band application...

Download paper

3. Nitrogen Recommendations for Wheat using the Chlorophyll Meter

The use of a hand held chlorophyll meter showed good promise in helping to make N recommendations for wheat on a field basis. Using 5 site-years on well drained soils over a 2- year period, a correlation index (R2) of 0.88 was found relating the March (Feekes 5) N needed for optimum yield with a differential chlorophyll reading. Research on this method will be continued and expanded to field trials. Soils in less than a well drained class may require a separate calibration or the method may not be...

Download paper

4. Changes in Nitrogen use Efficiency and Soil Quality After Five Years of Managing for High Yield Corn and Soybean

Average corn gain yields in the USA have increased linearly at a rate of 1.7 bulacre over the past 35 years with a national yield average of 130 bdacre. Corn yield contest winners and simulation models, ho ~ever, indicate there is -100 bda in exploitable corn yield gap. Six years (1999-2004) of plant development, grain yield and nutrient uptake \yere compared in intensive irrigated maize systems representing (a) recommended best management practices for a yield goal of 200 bdacre (Ml) and (b) intensive...

Download paper