Hi,
The paragraph below is my post from a previous thread. Last year we went to a local agronomist who took 5 samples of soil from our 5 acres. You should do this in the spring when the weeds are growing (docks at the small rosette stage).
We have had the results from the agronomist. PH was 5.8 and for grass needs to be about 6.5 - 7 (out of 14), Potash and Phosphate were ok. He recommended that we cut the paddock really low, box and dispose of the cuttings. Then using granulated lime put on 200kg and 1.5 cwt of fertilizer (20/10/10) per acre, leave for 7 - 10 days then spray with Headland Transfer , a selective weed killer. This is the stage we are at now and although we only sprayed on Friday the buttercups, docks and nettles are black and withering already. Then in 10 days time we are to chain harrow to loosen the top of the soil and spread new grass seed, a horse and pony mix, roll in and leave for a further 3-4 weeks. Hopefully this will get the job done. Will keep you posted with the results in 5 weeks time.
The outcome is that 85-90% of the buttercups have gone. We limed again this year same quantities as last year half the amount of fertilizer and the grass has come back really lush and dark green. We graze 10 falabellas on our land in small paddocks moving them before the grass gets too short, poo pick, chain harrow and top any of the longer grass although its lots of work the results are worth it.
Hope this helps.
V