Judging by the sods and tufts of dried grass littering my back garden last year Last year, anyone could have been forgiven for thinking that i had been making haystacks. It was, i was advised, as a result of marauding magpies in search of `leatherjackets`that were feasting on the grass roots causing it to die and thereby signalling their presence to the birds. I subsequently treated the lawn with `Nemasy's Nematodes` being very mindful to apply them in the correct ratios. I was therefore horrified to see , just yesterday,that the birds have started to dig again. It was my intention to have the garden dug over this summer and lay a new `instant` lawn but now i don't know what to do . Anyone out there with any ideas on the matter.