Statement (I) is correct: Surge irrigation is an advanced surface irrigation method where water is delivered to furrows intermittently in cycles of on-off pulses (using automated valves).
Statement (II) is correct: Intermittent wetting creates a thin sediment crust that reduces soil infiltration during subsequent pulses, allowing water to advance much faster across the furrow. This significantly reduces upstream deep percolation losses and tailwater runoff, dramatically improving application efficiency and uniformity.

Step-by-step calculation:

• Total system discharge = $150\text{ m}^3/\text{hr} = 150,000\text{ L/hr}$.
• Dripper discharge $q_e = 8\text{ L/hr}$.
• Total number of drippers/emitters in the system:
  $$N_{\text{emitters}} = \frac{150,000}{8} = 18,750$$
• Daily plant water requirement = $15\text{ L/day}$.
  With 1 hour daily operating time, each emitter provides 8 L. Thus, emitters needed per plant = $\frac{15}{8 \times 1} = 1.875 \approx 2\text{ emitters/plant}$.
• Total number of plants supported:
  $$N_{\text{plants}} = \frac{18,750}{2} = 9,375\text{ plants}$$
  6. With plant spacing of $1\text{ m} \times 1\text{ m} = 1\text{ m}^2$ per plant, the total area of the field is:
  $$\text{Area} = 9,375 \times 1\text{ m}^2 = 9,375\text{ m}^2$$

Using the Darcy-Weisbach formula for head loss due to friction:

Given:
Length $L = 50\text{ m}$
Diameter $d = 50\text{ mm} = 0.05\text{ m}$
Velocity $v = 1.0\text{ m/s}$
Friction factor $f = 0.05$
Acceleration due to gravity $g = 9.81\text{ m/s}^2$
Calculation:

Water charges collected from beneficiaries of public canal irrigation projects typically include water rates, betterment levy, and irrigation cess.