Proceedings :: North Central Soil Fertility Conference

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Twidwell, E.K

Bullock, D.G

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Authors

Gelderman, R.H

Gerwing, J.R

Twidwell, E.K

Daverede, I

Kravchenko, A

Hoeft, R.G

Nafziger, E.D

Bullock, D.G

Simmons, F.W

Daverede, I.C

Kravchenko, A.N

Hoeft, R.G

Nafziger, E.D

Bullock, D.G

Warren, J.J

Gonzini, L.C

Topics

Type

Oral

Year

1997

2000

2002

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Filter results3 paper(s) found.
1. Spoke Injection of Fertilizer Phosphorus for Grasses Fertilization of forge grasses with phosphorus has shown limited forage increases in South Dakota, even with low soil tests. Lack of response to added phosphorus may partially be due to fertilizer placement on established grass stands. Traditionally broadcasting fertilizer has been the only placement method available. Since P moves very iiiile in the soil, root feeding from tne added P must occur very ciose to the soil surface. A dry soil surface could limit P uptake by grasses, limiting any yield... Download paper
2. Effects of Soil Test, Tillage, and Manure and Fertilizer Application Method on Phosphorus Runoff Loss of phosphorus from agricultural lands into surface waters is of growing environmental concein. Phosphorus transported by surface runoff often ends up in streams and lakes and accelerates eutrophication, which affects the ability to use the water for drinking, fishing. recreation. etc (Foy and Withers, 1995). The niajor mechanisms by which agriculture contributes phosphorus to surface water is through runoff and erosion (Sharpley et al., 1994). Controlling run~ff and erosion from agricultural... Download paper
3. Phosphorus Runoff From Incorporated and Surface-Applied Fertilizer and Manure Continued inputs of fertiher and manure in excess of crop requirements have led to a build-up of soil phosphorus (I?) levels, creating an environmental rather than agronomic concern (Sharpley et al., 1994). The objective of this study was to evaluate the effects of soil test P level, source of P amendments, tillage, and manure application method on P runoff from agricultural soils. The treatments consisted of swine manure surface applied and injected at rates of 29 and 59 Ib acre-' of P, and triple... Download paper

Filter results3 paper(s) found.

1. Spoke Injection of Fertilizer Phosphorus for Grasses

Fertilization of forge grasses with phosphorus has shown limited forage increases in South Dakota, even with low soil tests. Lack of response to added phosphorus may partially be due to fertilizer placement on established grass stands. Traditionally broadcasting fertilizer has been the only placement method available. Since P moves very iiiile in the soil, root feeding from tne added P must occur very ciose to the soil surface. A dry soil surface could limit P uptake by grasses, limiting any yield...

Download paper

2. Effects of Soil Test, Tillage, and Manure and Fertilizer Application Method on Phosphorus Runoff

Loss of phosphorus from agricultural lands into surface waters is of growing environmental concein. Phosphorus transported by surface runoff often ends up in streams and lakes and accelerates eutrophication, which affects the ability to use the water for drinking, fishing. recreation. etc (Foy and Withers, 1995). The niajor mechanisms by which agriculture contributes phosphorus to surface water is through runoff and erosion (Sharpley et al., 1994). Controlling run~ff and erosion from agricultural...

Download paper

3. Phosphorus Runoff From Incorporated and Surface-Applied Fertilizer and Manure

Continued inputs of fertiher and manure in excess of crop requirements have led to a build-up of soil phosphorus (I?) levels, creating an environmental rather than agronomic concern (Sharpley et al., 1994). The objective of this study was to evaluate the effects of soil test P level, source of P amendments, tillage, and manure application method on P runoff from agricultural soils. The treatments consisted of swine manure surface applied and injected at rates of 29 and 59 Ib acre-' of P, and triple...

Download paper