PRESERVATION OF FORAGE 



45 



a soiling system. To plan such a succession of crops 

 requires accurate knowledge of the time required for each 

 crop to reach its growth, the length of time it may be fed 

 and also the average yield to be expected, so that the 

 proper area to be planted can be accurately determined. 



Annuals are more convenient to use in soiling systems 

 than perennials because plantings of the same crop can 

 be made at successive dates, and its feeding period thus 

 extended over several weeks' time. Furthermore, the land 

 becomes at once available for other plantings. While 

 perennials are often utilized in soiling systems, such are 

 seldom planted for this purpose alone, as it is rarely econ- 

 omy to plant them in an area as small as would be required. 



Soiling systems for the whole growing season have been 

 devised at several experiment stations, a few examples 

 of which are here given : 

 SOILING SYSTEM RECOMMENDED BY PHELPS FOR CONNECTICUT 



At the Pennsylvania Experiment Station the following 

 data were secured on the date of planting and yields of 

 various soiling crops : 



