官方藏书 / Science_-_Earth_Agricultural_Farming / Lessons on Soil

Lessons on Soil

Edward J. Russell · Science_-_Earth_Agricultural_Farming · 6 章

目录

Fig. 2. Columns showing what 100 parts of soil and subsoil were made of CHAPTER V THE PART THAT BURNS AWAY Fig. 32. Mustard growing in soils supplied with varying quantities of water. 16 very little water, 3 a nice amount of water, 15 too much water CHAPTER X THE SOIL AND THE COUNTRYSIDE INDEX THE FULL PROJECT GUTENBERG™ LICENSE