| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
a W.K. Kellogg Biological Stn. and Dep. of Crop and Soil Sciences, Michigan State Univ., Hickory Corners, MI 49060-9516
b Dep. of Plant, Soil, and Environmental Sciences, 5722 Deering Hall, Univ. of Maine, Orono, ME 04469-5722
* Corresponding author (porter{at}maine.edu)
Soil structural degradation is common in intensively cultivated ecosystems due to the depletion of soil organic matter (SOM). We investigated the mechanisms by which different frequencies of organic amendment application and rotation crops restore C, N, and aggregation in gravelly loam soils used for potato production. A single amendment application [FIRST; 22 Mg ha-1 compost and 45 Mg ha-1 beef cattle (Bos taurus L.) manure] did not affect total C in 1996 and increased it by 28% in 1997 relative to unamended plots (NONE); light fraction (LF) C accounted for 56% of this increase. Plots in which amendment was suspended for 1 yr (SASP) following 4 or 5 yr of annual application had more total C in 1996 (28%) and 1997 (46%) relative to NONE. A green manure crop consisting of oat (Avena sativa ‘Porter’), pea (Pisum sativum ‘Trapper’), and hairy vetch (Vicia villosa Roth) grown in 2-yr rotation with potatoes (Solanum tuberosum L.) increased soil C in 1997 (25.9 vs. 23.9 g kg-1), LF properties in 1996 and 1997, and water soluble carbohydrates (WSC) on several sample dates relative to an oat rotation crop. Large aggregate (2–6.5 mm) stability in 1996 and 1997 and medium aggregate (1–2 mm) stability in 1997 were increased by FIRST relative to NONE. Total soil C was more strongly related to medium (r = 0.65 in 1997) and large (r = 0.51 in 1997) aggregate stability than LF or water soluble carbohydrate fractions. Compost and manure influences occurred rapidly and were persistent, demonstrating that annual applications are not necessary to reverse soil degradation.
Abbreviations: CONT, amendments applied annually for 5 or 6 yr • FIRST, a single amendment application • LF, light fraction soil organic matter • NONE, amendments never applied • SASP, amendment inputs suspended after four or five consecutive years of application • SOM, soil organic matter • WSC, water soluble carbohydrates
This article has been cited by other articles:
|
|
 |
|
  J. Nyiraneza and S. Snapp Integrated Management of Inorganic and Organic Nitrogen and Efficiency in Potato Systems Soil Sci. Soc. Am. J., August 9, 2007; 71(5): 1508 - 1515. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 E. B. Mallory and G. A. Porter Potato Yield Stability under Contrasting Soil Management Strategies Agron. J., March 12, 2007; 99(2): 501 - 510. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. S. Grandy, G. P. Robertson, and K. D. Thelen Do Productivity and Environmental Trade-offs Justify Periodically Cultivating No-till Cropping Systems? Agron. J., October 3, 2006; 98(6): 1377 - 1383. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 A. S. Grandy, T. D. Loecke, S. Parr, and G. P. Robertson Long-term trends in nitrous oxide emissions, soil nitrogen, and crop yields of till and no-till cropping systems. J. Environ. Qual., July 1, 2006; 35(4): 1487 - 1495. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. S. Grandy and G. P. Robertson Aggregation and Organic Matter Protection Following Tillage of a Previously Uncultivated Soil Soil Sci. Soc. Am. J., June 21, 2006; 70(4): 1398 - 1406. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
G. M. McAndrews, M. Liebman, C. A. Cambardella, and T. L. Richard Residual Effects of Composted and Fresh Solid Swine (Sus scrofa L.) Manure on Soybean [Glycine max (L.) Merr.] Growth and Yield Agron. J., June 5, 2006; 98(4): 873 - 882. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
| The SCI Journals | Agronomy Journal | Crop Science | |||
| Journal of Natural Resources and Life Sciences Education |
Vadose Zone Journal | ||||
| Journal of Plant Registrations | Journal of Environmental Quality |
The Plant Genome | |||
