
Screening Asisten Irdra
Authored by Syamsul Arifin
Science
University
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40 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Pada hakekatnya, irigasi adalah menitipkan air kepada tanah untuk selanjutnya disampaikan kepada akar tanaman. Oleh sebab itu untuk menghitung jumlah air yang akan diberikan paling sedikit harus mengetahui sifat tanah berikut :
a. Infiltrasi, Perkolasi dan Permeabilitas
c. Infiltrasi, Kurva pF dan Kedalaman Perakaran
b. Struktur, Tekstur dan Porositas
d. Berat Isi, Berat Jenis dan Porositas
e. Tekstur, Bahan Organik Tanah dan Epipedon
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Berikut merupakan beberapa fungsi dari irigasi, kecuali :
a. Meningkatkan konsentrasi garam pada lapisan olah
b. Mengurangi kerusakan akibat frost
c. Menurunkan suhu tanah
d. Melunakkan lapisan keras saat pengolahan
e. Memenuhi kebutuhan air tanaman
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Pengukuran laju infiltrasi diperlukan jika kita akan melakukan praktek irigasi melalui cara :
Irigasi Permukaan (surface irrigation)
c. Irigasi Tetes (drip irrigation)
Irigasi Curah (sprinkler irrigation)
d. Irigasi Bawah Permukaan (subsurface irrigation)
e. Semua (A-D) jawaban betul
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Laju infiltrasi dipengaruhi oleh tekstur tanah. Pada kelas tekstur manakah laju infiltrasi paling cepat :
Lempung berdebu (silt loam)
c. Lempung berpasir (sandy clay)
Liat berdebu (loamy clay)
d. Pasir berlempung (loamy sand)
e. Lempung (loam)
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Air yang disiramkan ke dalam tanah tidak semuanya bisa tersedia bagi tanaman karena beberapa sebab. Air yang tersedia bagi tanaman adalah yang ditahan dalam pori tanah dengan kekuatan antara :
a. pF 2 - 4.2
b. 2,0 - 4,2 atm
c. pF 0,2 - 15
d. pF 4,2 - 15
e. pF 3,0 - 7,0
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Berikut merupakan faktor yang mempengaruhi neraca air dalam mintakat perakaran, kecuali :
Evapotranspirasi
c. Perkolasi
e. Drainase
Presipitasi
d. Irigasi
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Evapotranspirasi yang terjadi pada tanaman standart (rumput tingginya sekitar 15 cm, tumbuh normal, kecukupan air) disebut :
a. ET crop
c. Koefisien tanaman
e. ETm
b. ET potensial
d. Kebutuhan air tanaman (CWR)
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