A comparison of grazing and clipping for determining the response of permanent pastures to fertilization
1937
Robinson, R.R. | Pierre, W.H. | Ackerman, R.A.
The response of pastures to fertilizer and lime treatments as measured by grazing has been compared with the response as measured (a) by clipping permanent plats and (b) clipping by the "difference-method", i. e., obtaining the difference between the yields of temporarily inclosed areas and corresponding grazed areas. Although the yields obtained by clipping permanent plats have shown a progressive decrease in relation to the yields obtained by grazing, there has been a high correlation in any one year between the yields from clipping and the yields from grazing. A method is suggested whereby the clipped yields can be expressed in terms of grazing units. The response to fertilizer and lime treatments determined by the "difference-method" of clipping was a good measure of the response obtained by grazing. The ratio between the weight of oven-dry forage obtained by this method and total digestible nutrients calculated from grazing was 1:0.61.
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