Correct option is D
✅ (d) Sandy soil
· Tensiometers are ideal for measuring soil moisture in sandy soils.
· They effectively monitor soil moisture in the tension range of 0 to -80 centibars, common in sandy textures.
· In clayey soils, soil suction exceeds the measurement range of tensiometers.
❌ (a) Loamy soil
· Loamy soils may work, but tensiometers are less effective compared to sandy soils because loamy soils hold more water at higher tensions.
❌ (b) Laterite soil
· Laterite soils have high clay content and low water holding capacity, making tensiometer readings unreliable.
❌ (c) Clay soil
· Clay soils exert high matric potential beyond tensiometer capacity (>80 centibars).
· Tensiometers are unsuitable in such high-tension soils.