This element is needed for flower production or in grassland terms seed-heads. Potash may be applied at any time of the year except when the ground is frozen. It is not easily washed out of the soil except on light sandy soil, where is may be necessary to split the dressing to winter and summer applications. Lime Lime is essential to the well being of the sward, it is measures in the terms of pH value, neutral being 7.0. The best way to make good a deficiency in lime is to dress the land with ground limestone or chalk.
Lime is probably the most important fertiliser for horse paddocks.
Horse Manure Horse manure harbours the larvae and eggs of parasitic worms. Very high temperatures are required to kill the larvae and eggs in the much heap. On permanent pasture horse manure may be spread in the autumn and left for the rain to wash in over the winter, however the muck will make the grass unpalatable for the horse to eat over the winter. It is also advisable to graze cattle or sheep on the paddock before turning the horse out. Farmyard Manure Farmyard manure is full of organic matter and improves the condition of the sward without the dangers that horse manure possess.