Suited to the better loams, is not hardy and is 



The soy bean. not well suited for prevention of erosion or 



conserving nitrogen, will furnish a large amount 



of vegetable matter within a comjmratively short period of summer 



weather, does best if planted in drills. About \ bushel of seed per acre. 



Suited to light and medium loams, endures 

 The cow pea. drought and hot weather exceedingly well, not 



hardy, but will furnish a large amount of vege- 

 table matter in a relatively short period of summer weather, does best 

 in drills and requires about | bushel of seed per acre. 



3. CONDITIONS WHEN GREEN MANURING IS ADVISABLE 



The statement of possible benefits of green manuring quite clearly 

 indicates by inference the conditions under which the introduction of a 

 green manure crop is advisable, but at the same time it includes 

 references to so many and so important advantages that the reader 

 may be in danger of over-estimating its value. There is no question 

 that it can produce the beneficial effects referred to but there are con- 

 ditions under which these effects would be secured at too great cost. 

 Under the following conditions there can be no question that green 

 manuring will be profitable: 



1. When the green manure crop can be produced without the 

 sacrifice of a crop to be harvested, or during a period when the field 

 would otherwise be unoccupied, when it will help prevent loss of 

 nitrates, erosion and infestation by weeds. 



2. Green manuring will be especially important on soils made up 

 largely of sand or clay and naturally deficient in humus. 



3. Green manuring, especially with legumes, will be unusually 

 beneficial on. soils naturally deficient in available nitrogen compounds. 



4. It is especially beneficial in orchards: preventing erosion, furnish- 

 ing organic matter and keeping down weeds. 



5. The introduction of a green manure crop in cases where a crop to 

 be harvested must be sacrificed will self-evidently be in place only on 

 the cheaper lands. 



On the other hand where a farm is stocked to its 

 When not advisable, capacity, green manuring will seldom or never 



be advisable. Many of the green manure crops 

 have large food value. It will be found more profitable to feed clover 

 to the animals of the farm than to turn it in in most cases, and where 

 the excrements are carefully saved and returned to to the land practic- 

 ally all the effects of green manuring will be realized. 



