Comprehensive high-yield formula reference covering all 8 syllabus sections for GATE Agricultural Engineering (AG).
Drawbar Power = P_db = (Draft × Speed) / 3.6
Wheel Slip = S = (1 - V_actual / V_theoretical) × 100%
Dynamic Weight Transfer = ΔW = (P_db × h) / WB
Effective Field Capacity = EFC = (W × S × e) / 10
Implement Specific Draft = D_sp = D / (w × d)
Combine Cylinder Loss = L_c = (W_unthreshed / W_total) × 100%
Manning's Equation = V = (1/n) · R^(2/3) · S^(1/2)
Rational Runoff Equation = Q = (C · I · A) / 360
Universal Soil Loss Equation = A = R · K · L · S · C · P
Theis Confined Well = s = (Q / 4πT) · W(u)
Hooghoudt Spacing = S² = (4K1 h² + 8K2 d h) / q
Crop Water Requirement = ETc = Kc · ETo
Page Thin Layer Drying = MR = exp(-k · t^n)
Bond's Law of Crushing = E = 10 · Wi · (1/√d2 - 1/√d1)
Psychrometric Enthalpy = h = 1.006 T + w (2501 + 1.88 T)
Plank's Freezing Time = tf = (ρ L / ΔT) · [P a / h + R a² / k]
LMTD = ΔT_lm = (ΔT1 - ΔT2) / ln(ΔT1 / ΔT2)
Thermal Death Time = F = D · (log a - log b)
Newton-Raphson = x_{n+1} = x_n - f(x_n) / f'(x_n)
Simpson's 1/3 Rule = ∫y dx = (h/3) [y0 + 4∑y_odd + 2∑y_even + yn]
Eigenvalues = det(A - λI) = 0
Relative Speed = S1 + S2 (Opposite) | S1 - S2 (Same)
Combined Work Rate = 1/T = 1/T1 + 1/T2
Combinations = nCr = n! / [r! (n - r)!]
Practice Questions Using These Formulas