The influence of manures and organic residues on plant growth

[1] COLLISON RC, 1925, NY GENEVA AGR EXP ST, V114

[2] Davidson J, 1923, J AGRIC RES, V23, P0055

[3] Effect of tree products on bacteriologtcal activities in soil I Ammonification and nitrification [J]. SOIL SCIENCE, 1922, 13 (04) : 303 - 322

[4] SIEVERS FJ, 1926, WASH AGR EXP STA B, V206

[1] COLLISON RC, 1925, NY GENEVA AGR EXP ST, V114

[2] Davidson J, 1923, J AGRIC RES, V23, P0055

[3] Effect of tree products on bacteriologtcal activities in soil I Ammonification and nitrification [J]. SOIL SCIENCE, 1922, 13 (04) : 303 - 322

[4] SIEVERS FJ, 1926, WASH AGR EXP STA B, V206