Procurement price is basically the price that the government buys the produce for from the farmers. Most likely in this sentence, the farmers want the government to buy the milk at a higher price because they have been forced to waste their product and want compensation for the waste.

procure means to buy. So here the farmers are angry at the price they are being paid for their milk. https://www.italki.com/paul_curley

Procure means to buy, procurement means to buy and obtain for another. It is most often used for the buying and procurement of bulk items at the lowest price possible, before either selling it or distributing it to people within an organisation. Currently governments are busy procuring face masks to distribute to their countries hospitals. Procurement is a specialised buying often involving millions or billions of $'s or £'s So Miss Palmer has summed it up nicely. The price governments usually or large companies pay for items in bulk.