both cuts) ranged from 5.5 to 11.7 t haÿ1. Note that the
ÔsmoothingÕ eect of kriging resulted in narrower yield
ranges (Fig. 4) than were actually predicted at individual
sampling points. Actual DM yields for the 11 mowed
strips at cut 1 ranged from 3.5 to 6.7 t haÿ1, and those
for the seven mowed strips at cut 2 ranged from 3.0 to
3.7 t haÿ1.
Contour maps of predicted sward N yields at each
cut, and totalled over both cuts, are shown in Fig. 5(a)±
(c). Predicted N yields for individual points ranged from
50 to 190 kg haÿ1 at cut 1 and from 65 to 100 kg haÿ1 at
cut 2. Predicted total N yields (over both cuts) ranged
from 144 to 290 kg haÿ1. Note that the smoothing eect
of kriging resulted in narrower N-yield ranges (Fig. 5)
than were actually predicted at individual sampling
points. Actual N yields for the 11 mowed strips at cut 1