Nitrogen source influences on forage and soil in young southern-pine silvopasture

Karki, Uma; Goodman, Mary S.; Sladden, S.E.

doi:10.1016/j.agee.2008.09.007

Cited by 8 publications

(3 citation statements)

References 23 publications

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“…In the case of Kallenbach et al (2010) the planting density of the trees was assumed to be the same as an orchard-style planting (Reid et al 2009). Karki et al (2009) measured clover aboveground dry matter production in silvopastures and open pastures. The within- (1.82-m) and between-row (3.04-m) spacings were assumed to be similar to the spacing utilized in a conventional plantation-style planting (South 2006).…”

Section: Characteristics and Assumptions Of Selected Recordsmentioning

confidence: 99%

Over-yielding in temperate silvopastures: a meta-analysis

Pent

2020

Agroforest Syst

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Over-yielding in an intercropping system occurs when the productivity of the intercrop exceeds the overall productivity of the systems managed in segregation. The objective of this systematic review was to calculate the over-yielding of silvopastures compared to open pastures and forests, timber plantations, or orchards managed separately. A literature search was completed for comparisons of the productivity of these practices in temperate regions. Data collected from these studies included mean yields of timber or non-timber forest products, forages, and livestock, as well as the characteristics of the study site. Silvopasture practices improve the productivity of land typically managed separately for pasture or trees by 42–55%, depending on whether the productivity of the pastures is measured by livestock or forage output, respectively. In most cases, over-yielding occurred despite a reduction in individual forage, livestock, or tree productivity in the silvopastures. Calculating confidence intervals around these means was not feasible because standard errors were largely not reported or available. Some assumptions were made about the actual productivity of timber or non-timber forest products. This work illustrates the significant level of over-yielding that may be achieved by integrating trees, forages, and livestock into a single production system.

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Section: Characteristics and Assumptions Of Selected Recordsmentioning

confidence: 99%

Over-yielding in temperate silvopastures: a meta-analysis

Pent

2020

Agroforest Syst

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“…Higher productivity of most legume-Marshall ryegrass combinations, except berseem clover-Marshall ryegrass treatment, compared to the sole Marshall ryegrass found at the Selma study site is in agreement with previous findings. Karki et al (2009) found a 40% increase in the productivity of available spring forages when crimson clover was overseeded into bahiagrass pasture as compared to the same pasture managed with commercial nitrogen fertilizer in Americus, Georgia. Poor performance of berseem clover at both study sites could be due to soil type (sandy and light clay).…”

Section: Discussionmentioning

confidence: 99%

“…The overall benefits would be even higher when possible improvements in soil quality, biodiversity, erosion control and support for wildlife are accounted for as a result of pasture improvement and sustainable grazing management. A previous study (Karki et al, 2009) showed that incorporation of crimson clover in bahiagrass pastures improved soil quality with reduced penetration resistance and increased water-stable aggregates as compared to the same pasture managed with nitrogen fertilizer application. The economic benefits of improved pastures and grazing is also emphasized by Hancock (2012), who found 20% or higher increment in the net farm incomes of pasture-based livestock operators after participating in Grazing School.…”

Section: Discussionmentioning

confidence: 99%

Winter Forage Program Benefitted Small-Scale Goat Producers

Karki¹,

Karki²

2017

American Journal of Agricultural and Biological Sciences

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Small and limited resource farmers are raising goats on pastures in the southeast USA. Nevertheless, many of these farms do not have productive and quality pastures to support the nutrient requirements of their animals. Information on forages that are suitable to improve goat pastures and sustainably grazing those pastures with goats is still lacking. Study objectives were to (1) find winter forages suitable for goats, (2) evaluate the productivity and quality of these forages and (3) assess the benefits farmers would receive from pasture improvement and grazing management. Two separate studies were conducted, one in Selma and another in Phenix City, Alabama, USA in 2012 and 2013 (September/October-April). Each study was designed as a randomized complete block with three replications. Five legumes: Arrowleaf clover (Trifolium vesiculosum Savi), berseem clover (Trifolium alexandrinum L.), crimson clover (Trifolium incarnatum L.), hairy vetch (Vicia villosa Roth) and winter peas (Pisum sativum L.) were grown with Marshall ryegrass (Lolium multiflorum Lam.) in 40:60 legume:grass ratio on separate strips. A sole Marshall ryegrass strip was planted as a control. Goats' preference for and productivity and quality of forages and benefits associated with winter pasture and grazing were evaluated. Goats readily grazed all forages but winter peas at the very first exposure; from the second exposure onwards, goats grazed winter peas well. The mixtures of crimson clover and Marshall ryegrass and hairy vetch and Marshall ryegrass produced the most. The cost of goat production was significantly reduced because of the development and management of winter pastures. Raising goats on pastures can be much more beneficial than raising them on purchased feeds.

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