ISSN:
1365-2494
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
This paper describes the derivation of a series of equations for estimating mean grass production on cut swards under different fertilizer nitrogen, soil and climatic regimes. Using data from the National Grassland Manuring Trial GM20 for a late flowering perennial ryegrass, equations have been estimated for the individual cuts. On the basis of data from cutting trials at Hurley, equations for extrapolating yields under cutting strategies with different first cut dates and regrowth intervals have been derived. The resultant model for predicting yields has then been tested against data obtained from two separate cutting trials. Although in individual cases significant differences between predicted and observed mean yields were noticed, in general the predicted yields were a reasonable approximation to observed yields. Comparison of the predicted yields with those derived from an earlier study by the authors indicated an improvement in the accuracy of prediction.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1365-2494.1986.tb01819.x
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