With our system of grassland farming in New Zealand, and with the emphasis placed on the relationship between the grazing animals and the pasture in which they run, we have been tending in recent years to modify our farm-management methods. We have to some extent forgotten or temporarily mislaid some of the older traditional practices. In particular there has been an evident avoidance of the need for forage crop provision, and today, in the North Island, only 1 acre in 30 of our arable land is under the plough each year. This means in effect that our pastures on the average are 20 to 30 years old before they are broken up and resown.