Suited to the better loams, is not hardy and 

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



or conserving nitrogen, will furnish a large 

 amount of vegetable matter within a comparatively short period 

 of summer weather, does best if planted in drills. About ^ iDvishel 

 of seed per acre. 



vaulted to light and medium loams, endures 

 The cow pea. drouth and hot weather exceedingh^ well, not 



hardy, but will furnish a large amount of 

 vegetable matter in a relatively short period of summer weather, 

 does Ix'st in drills and requires about h 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 intro- 

 duction 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 ^alue. 

 There is no question that it can produce the beneficial effects 

 referred to but there are conditions under which these eft'ects 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 ca:n 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, fur- 

 nishing 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 



When not advis- to its capacity, green manuring will seldom 



able. 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 the land practically all the effects 

 of green manuring will be realized. 



