Art and life and Seed, soil, tillage and crop,

Mode of access: Internet.

Effects of basic tillage methods and soil compaction on corn production /

Cover title.

The non-deterioration of the soil : being an essay to explain the continued local uniformity in depth, text and chemical constitution of the soil in the natural state, or when uniformly cultivated, whether without or with manure /

Mode of access: Internet.

Tillage options for conservation farmers.

Shipping list no.: 89-80-P.