§ 21. That a Supplementary sum, not exceeding £1,563,870, he granted to Her Majesty, to defray the charge which will come in course of payment during the year ending on the 31st day of March, 1956, for the salaries and expenses of the Department of Agriculture for Scotland aid the Crofters Commission: for grants and subsidies, including certain payments under agricultural price guarantees, to farmers and others for the encouragement of food production and the improvement of agriculture: and for grants, grants in aid and expenses in connection with services to agriculture; including land drainage and flood services; purchase, improvement and management of land; land settlement; public works in the congested districts: services in connection with livestock and compensation for slaughter of diseased animals; provision and operation of machinery; training and labour schemes; control of pests; agricultural education, research and advisory services; marketing; and agricultural credits.