Proceedings :: North Central Soil Fertility Conference

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Greer, K

Beegle, D.B

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Beegle, D.B

Weld, J.L

Sharpley, A.N

Gburek, W.J

Beegle, D.B

Byers, C

Fernandez, F.G

Farmaha, B

Greer, K

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Oral

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1990

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2008

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Filter results4 paper(s) found.
1. Manure Management Nutrient management should be looked at as an integrated, continuous process. It starts with an assessment of the overall nutrient balance on the farm If this simple assessment indicates a nutrient imbalance, a more detailed assessment will indicate specific field imbalances that need to be considered in the manure management process. Once an assessment has been accomplished, management options for dealing with the situation can be explored. If there is an overall nutrient imbalance on the farm,... Download paper
2. Identifying Critical Sources of Phosphorus Export from Agricultural Watersheds Phosphorus (P) is an essential element for plant and animal growth, and its input to agriculture is necessary to maintain profitable crop and animal production. Eutrophication, the natural aging of lakes or streams brought on by nutrient enrichment, can be accelerated by P inputs to fresh waters from human activities (Carpenter et al., 1998; Schindler. 1977). Eutrophication has been identified as the main problem in surface waters withimpaired water quality (USEPA. 1996). It restricts water use for... Download paper
3. Effect of Phosphorus and Potassium Fertilization on Corn Development and Root Distribution in Conservation Tillage In conservation tillage systems, like no-till (NT) and strip-till (ST), phosphorus (P) and potassium (K) typically become vertically and/or horizontally stratified in the soil. This stratification has the potential to make P a nd K less available and to limit corn yield. The objective of this study is to determine the infl uence of tillage and P and K placement and rate on soil P and K content, soil water status, root and shoot development, and grain yield of corn. The experiment was arranged in... Download paper
4. Liming in No-till Systems In 1985 a study was initiated at Penn State to look at the effects of surface application of lime on a very acid, long-term no-till soil. Since 1977 this field had been in no-till corn production with no limestone applied. The initial pH of "plow layer" was 5.1 and the surface 2 inch pH was 4.5. The limestone recommendation, based on the SMP buffer pH and a target pH of 6.5, was 6000 Ib calcium carbonate equivalent (CCE) per acre. The study included four limestone rates (0. 3000, 6000.9000 Ib CCWA)... Download paper

Filter results4 paper(s) found.

1. Manure Management

Nutrient management should be looked at as an integrated, continuous process. It starts with an assessment of the overall nutrient balance on the farm If this simple assessment indicates a nutrient imbalance, a more detailed assessment will indicate specific field imbalances that need to be considered in the manure management process. Once an assessment has been accomplished, management options for dealing with the situation can be explored. If there is an overall nutrient imbalance on the farm,...

Download paper

2. Identifying Critical Sources of Phosphorus Export from Agricultural Watersheds

Phosphorus (P) is an essential element for plant and animal growth, and its input to agriculture is necessary to maintain profitable crop and animal production. Eutrophication, the natural aging of lakes or streams brought on by nutrient enrichment, can be accelerated by P inputs to fresh waters from human activities (Carpenter et al., 1998; Schindler. 1977). Eutrophication has been identified as the main problem in surface waters withimpaired water quality (USEPA. 1996). It restricts water use for...

Download paper

3. Effect of Phosphorus and Potassium Fertilization on Corn Development and Root Distribution in Conservation Tillage

In conservation tillage systems, like no-till (NT) and strip-till (ST), phosphorus (P) and potassium (K) typically become vertically and/or horizontally stratified in the soil. This stratification has the potential to make P a nd K less available and to limit corn yield. The objective of this study is to determine the infl uence of tillage and P and K placement and rate on soil P and K content, soil water status, root and shoot development, and grain yield of corn. The experiment was arranged in...

Download paper

4. Liming in No-till Systems

In 1985 a study was initiated at Penn State to look at the effects of surface application of lime on a very acid, long-term no-till soil. Since 1977 this field had been in no-till corn production with no limestone applied. The initial pH of "plow layer" was 5.1 and the surface 2 inch pH was 4.5. The limestone recommendation, based on the SMP buffer pH and a target pH of 6.5, was 6000 Ib calcium carbonate equivalent (CCE) per acre. The study included four limestone rates (0. 3000, 6000.9000 Ib CCWA)...

Download paper