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

Bulletin of the National Research Centre

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

N source	Regression coefficient (b)	Probability	r²	N equivalence relative to inorganic N (%) (b_{orgN ÷} b_inorgN × 100)
Compost	2.61	0.003**	0.80	30
Chicken manure^a	4.31	0.001**	0.94	50
FYM	5.35	< 0.001***	0.88	62
Inorganic N^b	8.58	< 0.001***	0.93

^a24 m³ ha⁻¹
^bThe maximum rate of application used in estimating the regression coefficient for compost, chicken manure and FYM