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Author:
Piper, Charles V. (Charles Vancouver) , 1867-1926 , Pieters, A. J.
Subject:
Green manuring , green manures , cover crops , nitrogen fixation , soil nutrients , soil fertility , nitrogen , legumes , soil inoculation , nitrification , soybeans , grasses , grain crops , tillage , soil pH , Trifolium lappaceum
Physical description:
45 p. : ill., 1 map ; 23 cm.
Additional Author(s):
Piper, Charles V. (Charles Vancouver) , 1867-1926Pieters, A. J.
Collection:
Organic Roots Collection
Series:
Farmers' bulletin
Author:
Spillman, W. J. (William Jasper) , 1863-1931
Subject:
Soil management , Soil productivity , soil , soil amendments , soil degradation , soil conservation , soil quality , soil fertility , soil erosion , land restoration , green manures , soil organic matter , soil exhaustion
Physical description:
16 p. ; 23 cm.
Additional Author(s):
Spillman, W. J. (William Jasper) , 1863-1931
Collection:
Organic Roots Collection
Series:
Farmers' bulletin