000
00220nam a2200097Ia 4500
100
_a
Sparks D.L.
250
_a
1st
020
_a
81-83990-051-7
245
_a
Advances in agronomy Vol.91
260
_b
Academic press, Amsterdam
_c
2006
082
_a
631SPA
999
_c
318841
_d
318841