Introduction
Conservation practice | Contracts | Area impacted (ha) | Installeda
| Units |
---|---|---|---|---|
Conservation crop rotation | 1418 | 16 418 | 16 418 | ha |
Residue and tillage management, No-till | 1408 | 16 366 | 16 366 | ha |
Nutrient management | 959 | 11 318 | 11 318 | ha |
Integrated pest management | 712 | 8503 | 8453 | ha |
Conservation cover | 541 | 3315 | 2976 | ha |
Filter strip | 309 | 1928 | 282 | ha |
Cover crop | 232 | 2888 | 2720 | ha |
Grassed waterway | 101 | 733 | 26 | ha |
Underground outlet (Blind inlet) | 17 | 361 | 6095 | m |
Water and sediment control basin | 10 | 306 | 25 | no |
Materials and methods
Site description
Property | Field 1 | Field 2 | Field 3 | Field 4 |
---|---|---|---|---|
Size (ha)a
| 2.2 | 2.7 | 4.0 | 3.5 |
Soil series | Glynwood loam Pewamo silty clay Morley silty clay loam | Blount silt loam Glynwood loam | Glynwood loam Pewamo silty clay Wallkill silt loam | Glynwood loam Morley silty clay loam Wallkill silt loam |
Soil taxonomy of dominate soil series | Fine, illitic, mesic Aquic Hapludalfs | Fine, illitic, mesic Aeric Epiaqualfs | Fine, illitic, mesic Aquic Hapludalfs | Fine, illitic, mesic Aquic Hapludlalfs |
Mehlich 3 P (mg kg−1) | 28 | 33 | 18 | 22 |
Depth to tile (m) | 0.9 | 0.9 | 0.9 | 0.9 |
Tile diameter (cm) | 10 | 10 | 15 | 10 |
Flowpath | Dendritic | Dendritic | Closed depression | Closed depression |
Tillage | No-tillage | Rotational tillageb
| Conventional tillage | Conventional tillage |
Crop rotation | Corn/soybean | Corn/Soybean | Corn/soybean/oat/wheat | Corn/soybean/oat/wheat |
Grassed waterway | Installed in 2006 | Installed in 2010 | – | – |
Surface water drainage | – | – | Tile riser/blind inlet | Tile riser/blind inlet |
Treatments and data
Field 1 | Field 2 | Field 3 | Field 4 | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Crop | Practicesa
| Events | Crop | Practices | Events | Crop | Practices | Events | Crop | Practices | Events | |
2004 | Corn | N | 12 | Corn | 14 | |||||||
2005 | Soybean | N | 1 | Soybean | 4 | Alfalfa | N, C | 1 | Corn | C | 6 | |
2006 | Corn | N, G | 6 | Corn | 18 | Alfalfa | N, C | 7 | Soybean | C | 8 | |
2007 | Soybean | N, G | 6 | Soybean | 8 | Wheat | C, B | 3 | Wheat | C, B | 4 | |
2008 | Corn | N, G | 2 | Corn | 0 | Corn | C | 3 | Silage | C, B | 3 | |
2009 | Soybean | N, G | 9 | Soybean | 16 | Soybean | C, Bb
| 4 | Soybean | C, Bb
| 4 | |
2010 | Corn | N, G | 10 | Corn | G | 12 | Oats | C | 7 | Oats | C, B | 9 |
2011 | Soybean | N, G | 11 | Soybean | G | 13 | Wheat | C, B | 10 | Wheat | C | 10 |
2012 | Corn | N, G | 0 | Corn | G | 1 | Corn | C, B | 0 | Corn | C | 0 |
2013 | Soybean | N, G | 7 | Soybean | G | 4 | Soybean | C | 8 | Soybean | C | 8 |
Sample analysis
Statistics
Results
Hydrology
Conservation tillage
Conservation crop rotation
Grassed waterway
Blind inlet
Discussion
Conservation tillage
Conservation crop rotation
Grassed waterway
Blind inlet
Subsurface tile
Potential impact of Farm Bill
Estimated untreated | Estimated with conservation | |||||||
---|---|---|---|---|---|---|---|---|
Surface | Tile | Surface | Tile | |||||
SP | TP | SP | TP | SP | TP | SP | TP | |
No-till | 190 | 5250 | 651 | 4830 | 375 | 1600 | 494 | 1460 |
Conservation crop rotation | 509 | 936 | 520 | 2280 | 76 | 159 | 402 | 2200 |
Grassed waterway | 10 | 164 | 21 | 326 | 59 | 133 | 23 | 102 |
Filter stripa
| 27 | 432 | 56 | 858 | 156 | 351 | 61 | 268 |
Blind inlet | 6 | 40 | 6 | 48 | 1 | 8 | 10 | 61 |
Water and sediment control basinb
| 5 | 34 | 5 | 41 | 1 | 7 | 8 | 51 |