In Germany, they set aside some farmland for hedgerows and fallow weed plots. It is often a win win for farmers. The farmers sell hunting lease rights and the better the wildlife the higher the price. The government subsidizes habitat areas. And the farmers usually set aside the poorest sections of the area like steep slopes etc.
Habitat isn't the real issue here, predators are. Especially recently when hunting seasons are set by the uninformed politicians. We call it feel good management, most of the off-seasons are during brood months. But the catch is they protect invasive and overpopulated predators at the same time. Side note, the predators have litters at the same time as game animals, birds, Hare, and Rabbits are trying to reproduce and the predators are pretty much hunting 24/7 trying to feed everybody. In effect, the seasons aren't set for population control but to protect predator rearing months. In effect baby, Racoons and Fox are more important than small game animals. Poor management practices. Doubly poor management, it used to be 15% of farmland was mandated (and subsidized) to be set aside for wildlife, that mandate has steadily shrunk over the years. A double whammy less habitat more predators.
The beginning of the thread was about Pheasant habitat. Basically they need windbreaks in the winter, hedgerows or thickets, overhead cover in the brood and rearing months, seed, and insects. Rape makes good habitat, both cover, food, and renewable. Corn left to ripen on the stock. Sunflower plots and grass/grain feed plots, wild weed plots next too or near a hedgerow or thicket. Blackberry thickets also work well, the thorns inhibit most predators and Pheasant seem to be able to move through them well enough. I (and the Pheasant) favor Blackberry thickets, wild weed, and Rape next to a hedgerow, there are most always Pheasant there. Wild weed plots are really popular in the spring and summer, Pheasants favor brooding there.