CHAPTER XX

MIXTURES FOR CROPS 209-219

Composition of plant not a guide 209

The multiplication of formulas 209

A few combinations are safest 210

Amount of application 211

Similarity of requirements 213

Maintaining fertility 215

Fertilizer for grass 216

All the nitrogen from clover 218

Method of applying fertilizers 218

An excess of nitrogen 219

Crops and Methods for Soil Improvement · 第 20 / 25 章