Soal Latihan Pengairan Tanaman

The topography of the land affects the water needs of plants. In sloping land, water will flow faster due to gravity, resulting in a higher water requirement compared to flat land where water flows slower. Therefore, the correct answer is a. Lebih banyak dibandingkan dengan lahan yang datar, karena air akan lebih cepat mengalir. (More water compared to flat land, because water will flow faster).

The correct answer is a. Meningkatkan resiko penumpukan garam. The other options (b, c, d) all mention the benefits of using drip irrigation, such as increasing the value of water, improving plant growth and yield, and enhancing efficiency and effectiveness of water distribution. However, increasing the risk of salt accumulation is not a benefit of drip irrigation. In fact, drip irrigation can help reduce salt buildup in the soil by providing water directly to the roots of plants, minimizing evaporation and leaching of salts.

Irigasi alur adalah metode irigasi tanaman yang dilakukan dengan mengalirkan air ke tanaman melalui parit antara guludan atau bedengan. Dalam metode ini, air dialirkan secara teratur dan merata melalui alur-alur yang dibuat di sekitar tanaman, sehingga air dapat meresap ke dalam tanah dan mencukupi kebutuhan air tanaman. Metode ini sering digunakan untuk tanaman yang ditanam dalam barisan, seperti padi, jagung, dan sayuran.

In surface irrigation, water is directly applied to the soil surface from a channel or pipe with a water level higher than the elevation of the land to be irrigated. The recommended height is around 10~15 cm.

The water supply in the irrigation plot is stopped when the length of the plot reaches 3/4 of its total length.

The given correct answer is "b. fertigasi". Fertigasi is the term used to describe the practice of providing irrigation water and fertilizers simultaneously through emitters placed near the plant roots. This method ensures that the plants receive both water and nutrients efficiently, leading to better growth and productivity. Drainasi refers to drainage, evapotranspirasi refers to the process of water loss through evaporation and transpiration, and regulasi refers to regulation.

Irigasi curah adalah metode irigasi di mana air dibiarkan mengalir secara bebas di atas lahan pertanian. Keuntungan dari irigasi curah adalah efisiensi pemakaian air yang cukup tinggi, dapat digunakan untuk lahan dengan topografi bergelombang, dan dapat digunakan untuk kedalaman tanah (solum) yang dangkal. Namun, irigasi curah tidak memerlukan perataan lahan (land grading) karena air dibiarkan mengalir secara bebas.

The correct answer is b. Jenis tanah (type of soil). The water requirement and irrigation scheduling for plants are determined by factors such as soil moisture, type of plants, and stage of plant development. However, the type of soil does not directly affect the water requirement and irrigation scheduling. Different types of soil may have different water holding capacities, but this can be accounted for by adjusting the irrigation schedule based on soil moisture levels.

The correct answer is c. Asal-usul tanaman. The origin of the plant refers to where the plant originally came from, such as its native habitat or the region it is adapted to. The origin of the plant can affect its characteristics, including its water requirements and ability to transpire water through its leaves. Therefore, the origin of the plant can influence its evapotranspiration rate.

Bubbler irrigation is the method of delivering water to the soil surface in a slow and controlled manner using small tubes or pipes. This method mimics the flow of small bubbles and is commonly used in gardens or small-scale irrigation systems. Drip irrigation, on the other hand, involves the use of small emitters that deliver water directly to the roots of plants. Sub-surface irrigation is a method where water is applied below the soil surface. Spray irrigation involves spraying water over a large area using sprinklers or sprayers. Therefore, the correct answer is c. bubbler irrigation.