CHAPTER IV

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Natural Manure.-- Accumulated Plant-food in the Soil.-- Exhaustion of the Soil.-- Why our Crops are so Poor.-- How to get Larger Crops.-- We must Drain, Cultivate thoroughly, and Make Richer Manure. 23

## CHAPTER V .

Swamp-muck and Peat as Manure.-- Draining Swamp-land.-- Composition of Peat and Muck. 29

## CHAPTER VI .

What is Potential Ammonia. 31

## CHAPTER VII .

Tillage is Manure.-- The Doctor’s Lecture on Manure. 32

## CHAPTER VIII .

Summer-fallowing.-- Mr. Lawes’ crop every other year.-- Wheat after Barley.-- For Larger Crops raise less frequently, and Manure Higher; also keep better Stock, and Feed Higher. 34

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