The fixation of nitrogen in some Colorado soils : a further study / Headden, William P.(William Parker),1850-1932. text Fort Collins, Colo. : Agricultural Experiment Station of the Agricultural College of Colorado, 1910. eng application/pdf COABNRBC100182 Colorado Agriculture Bibliography Soils Nitrogen COAB_21708202.pdf "http://www.acns.colostate.edu/?page=copyright"
The fixation of nitrogen in some Colorado soils : a further study /
Headden, William P.(William Parker),1850-1932.
text
Fort Collins, Colo. : Agricultural Experiment Station of the Agricultural College of Colorado,
1910.
eng
application/pdf
COABNRBC100182
Colorado Agriculture Bibliography
Soils
Nitrogen
COAB_21708202.pdf
"http://www.acns.colostate.edu/?page=copyright"