77 

 HM-HM-HM, whereas soil OM increased from 0.86 to 0.9^?S in M-IM-IM. 

 High OM content in pattern LM-LM-LM was probably due to large amount of 

 crop residues from southern peas. Effect of fertilizer levels on soil 

 OM was apparent after harvest of second and third crops in all cropping 

 patterns. After harvest of second crops, soil OM content was signifi- 

 cantly higher at high than at low fertilizer level, but this trend was 

 not consistent at harvest of third crops. 



Significant differences in soil nitrogen (n) were observed among 

 cropping patterns after harvest of second and third crops. Cropping pat- 

 terns HM-HM-HM and HM-LM-MM resulted in significantly hi^er soil N 

 than LM-LM-LM and HM-MM-LM after harvest of second crops. After harvest 

 of third crops, highest soil N (95 ppm) was measured in HM-HM-HM. Low 

 soil N was observed in cropping patterns HM-MJVI-LM, HM-LM-MM, and 

 LI'l-LM-LM even after harvest of third crops. Differences in soil N were 

 only observed after collard in HM-HM-HM. Application of low, medium, 

 or high fertilizer level resulted in similar soil N after each crop 

 in cropping patterns LM-LM-LM, and HM-LM^4M. 



A consistent increase in soil K was observed with successive 

 cropping in HM-HM-HM, but not with the other cropping patterns. Soil K 

 increased from 84 ppm after bulb onion to I76 ppm after collard. In 

 general, soil K was lowest with LM-LM-LM where low levels of fertilizer 

 were applied, but after harvest of second and third crops, soil K was 

 not different between cropping patterns LM-LM-LM and HM-MM-LM. Soil K 

 was influenced by fertilizsr levels, in that, increasing fertilizer level 

 increased soil K for each ci-op in all cropping patterns. Application 

 of medium to high levels of fertilizer usually resulted in higher soil 

 K than low fertilizer level. The residual soil K levels from all 



