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Table 10 Nitrogen fertilizer equivalencies of different manure types estimated from linear regression coefficients of the relationships (y = a + bx) between seed yield (kg ha−1) of sesame and the quantities of N applied (kg ha−1) in the manures

From: Effect of manure sources and rates on nitrogen replacement value, sesame yield and nutrient content under drip irrigation system

N source Regression coefficient (b) Probability r2 N equivalence relative to inorganic N (%) (borgN ÷ binorgN × 100)
Compost 2.61 0.003** 0.80 30
Chicken manurea 4.31 0.001** 0.94 50
FYM 5.35 < 0.001*** 0.88 62
Inorganic Nb 8.58 < 0.001*** 0.93  
  1. a24 m3 ha−1
  2. bThe maximum rate of application used in estimating the regression coefficient for compost, chicken manure and FYM