(a) A dairy farmer plans to build a milking parlour for 40 cows. (i) Name two types of milking parlour layout the farmer could use. [2] (ii) State three hyg...

(a)(i) Two types of milking parlour layout [2]:

1. Herringbone parlour - cows stand at an angle to a central pit, allowing the milker to access udders from below. [1]
2. Rotary (carousel) parlour - cows stand on a slowly revolving platform and are milked as it turns. [1]

Other acceptable answers: tandem parlour (cows stand in a line, one behind another) or abreast parlour (cows stand side by side facing the same direction).

(a)(ii) Three hygiene practices during milking [3]:

1. Wash the udder with clean warm water and dry it thoroughly before attaching the milking unit. This removes dirt and bacteria that could contaminate the milk. [1]
2. Dip teats in disinfectant (teat dipping) after milking. Post-milking dipping seals the teat canal while it is still open, preventing bacteria from entering and causing mastitis. [1]
3. Wash all milking equipment with hot water and detergent after each milking session. Milk residues left in pipes and clusters are an ideal breeding ground for bacteria. [1]

Also acceptable: milker wears clean gloves/has clean hands; foremilk is discarded or tested with a strip cup to check for mastitis.

(b) Why the floor should be concrete with a smooth, sloped surface [3]:

• Concrete is durable and non-absorbent, so liquids do not soak in and harbour bacteria. This makes thorough cleaning with water and disinfectant effective. [1]
• A smooth surface prevents injuries to hooves and allows scrubbing equipment to clean every area without trapping dirt in crevices. [1]
• A sloped surface ensures that waste water, urine and spilled milk drain continuously into a collection channel, preventing pooling. Standing water breeds pathogens and makes the floor dangerously slippery. [1]

(c) Waste water and manure management to prevent pollution [3]:

1. Waste water should be channelled through drains to a soak-away pit or settling tank, where solids settle out and liquids are absorbed or treated before they can reach watercourses. [1]
2. Solid manure should be collected and composted. Composting breaks down pathogens and converts the waste into valuable organic fertiliser for crops. [1]
3. Effluent must never be allowed to enter rivers or streams. Nutrient-rich runoff causes eutrophication: excessive algal growth depletes dissolved oxygen, killing aquatic life. [1]

(d) Two reasons a milking parlour is more efficient than hand milking in the field [2]:

1. Speed - a machine milks each cow faster than hand milking, so fewer labour hours are needed and labour costs fall. [1]
2. Cleanliness - milk in a parlour is collected into a closed system, reducing contamination from dust, flies and field debris that would affect open-bucket hand milking. [1]

Also acceptable: milk can be cooled quickly using in-parlour refrigeration; cows can be fed concentrates during milking, improving nutrition management.