In the field soil structure test used for aquaculture site selection, what does it mean if a soil sample forms a ball but breaks apart when rolled into a rod?
Site Selection And Water Quality
Question · Easy
A soil sample can be rolled into a rod, but breaks when the rod is bent into a ring. How is this soil classified in the field texture test?
Question · Medium
A soil sample can be bent into a U shape but cannot be closed into a complete ring. Which soil class does this indicate?
A soil sample forms a ring, but the ring shows visible cracks when closed. What soil texture does this represent?
Which soil texture classification, identified by the field ball-rod-ring test, is generally most suitable for building an earthen pond that holds water without a plastic liner?
What is the main purpose of running a soil texture and structure test before building an earthen pond?
In the sedimentation jar test for soil texture, which sequence of steps is correct?
Question · Hard
A settled soil sample in a sedimentation jar has a total column height of 20 cm. The sand layer measures 8 cm, the silt layer measures 6 cm, and the clay layer measures 6 cm. What percentage of the sample is sand?
When taking a soil sample for site testing, what should be done immediately after digging soil from two different depths?
According to the Department of Fisheries Malaysia's good aquaculture practice standard for freshwater fish farming, what is the recommended minimum dissolved oxygen (DO) level in pond or tank water?
What is the recommended optimum pH range for freshwater fish farming water under the Malaysian good aquaculture practice standard?
Why must ammonia levels be monitored daily and kept below the recommended limit in a fish farming system?
What is the recommended optimum water temperature range for rearing freshwater food fish such as tilapia?
A farm measures water clarity using a Secchi disk and records a reading of 15 cm, compared with the recommended optimum range of 30-45 cm. What does this low reading most likely indicate?
When evaluating a water source for a new aquaculture site, what is the most important requirement?
Which factor should be considered when selecting a location for an aquaculture farm to minimise environmental and health risk?
What does the certification scheme "myGAP" represent for a Malaysian aquaculture farm?
In the context of the Akuakultur dan Haiwan Rekreasi syllabus, how does "Amalan Akuakultur Baik" (AAB) differ from PPE (Peralatan Keselamatan Diri) as terms used in the industry?
Which freshwater fish farming system uses a dug or embanked earthen basin as its main structure?
Farming Systems And Feed
Cage culture (ternakan sangkar) for freshwater fish is typically set up in which environment?
What is a key practical advantage of using a polyethylene (PE) tank for fish rearing compared with an earthen pond?
Fibreglass tanks are often chosen for ornamental fish breeding facilities mainly because of which property?
What is a typical use case for a canvas tank (tangki kanvas) in fish farming?
Compared with a canvas or PE tank, what is a main advantage of a concrete tank (tangki konkrit) for fish farming?
How does pen culture (kurungan) differ from cage culture in a freshwater farming system?
A farmer wants to rear fish inside a reservoir by anchoring nets both to the lake bottom and enclosing a large surface area, allowing the fish to use the natural substrate. Which system is this?
Live feed such as infusoria, daphnia and tubifex worms are most commonly used for which stage of fish rearing?
What is a defining characteristic of formulated (pellet) feed used in grow-out fish farming?
In good feeding management practice, why is daily feed quantity typically calculated as a percentage of the fish's total body weight?
What is a common consequence of consistently overfeeding fish in a pond or tank system?
Newly hatched fry with very small mouths are usually started on which type of live feed before progressing to larger live feed such as daphnia?
Which piece of equipment is most directly useful for culturing live feed such as daphnia on a small aquaculture farm?
Which of these is a common drawback of earthen ponds compared with tank systems for fish farming?
A farmer with a limited budget and access to a natural earth site wants the lowest-cost system for large-scale grow-out of food fish. Which system best fits this scenario?
A grow-out tilapia pond stocks fish with a combined body weight of 200 kg. The farmer follows a feeding rate of 3% of body weight per day. How many kilograms of feed should be given that day?
What is one advantage of an earthen pond system for growing food fish such as tilapia, despite its water-control drawbacks?
What is the first general step before breeding freshwater food fish such as tilapia?
Fish Breeding
Which physical traits are typically used to identify a male tilapia broodstock, as opposed to a female?
Which trait would most reliably indicate that a female tilapia broodstock is ready or carrying eggs?
What is the correct general order of steps for breeding tilapia on a small farm?
Tilapia are known as "mouth brooders." What does this term describe about their reproductive behaviour?
What does "asuhan benih" (fry rearing) mainly involve after tilapia fry are collected from the breeding site?
Why is grading fry and juvenile fish by size an important step before further rearing or sale?
In the harvesting process for a grow-out pond of food fish, which action is considered correct practice?
After harvesting, which storage method is appropriate for keeping fresh fish cold before they reach the market?
What is a typical criterion used when choosing broodstock to improve fry production and quality?
A farmer notices poor fry yield from a tilapia breeding pond despite using healthy broodstock. Which factor is most likely to explain low fry yield under otherwise good broodstock conditions?
Why is water quality monitoring especially critical during the fry-rearing stage compared with adult grow-out?
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