9 



management crops such as mungbean (Vigna radiata L. Wilczek) and cowpea 

 (Vigna unguiculata L. Walp.) are often planted after rice by farmers in 

 rain-fed areas where market is limited and a r.a.jor porxion of the produce 

 is consumed "by the farm family (26, 114, 17?). Although these crops 

 require low management levels, sxudies indicate that they respond to 

 improved levels of cultural management. For example, Herrera et al. 

 (76) reported that adequate control of insect pests from vegetative tc 

 flowering stages significantly increased yield of m/ongheans . 



In Taiwan, vegetable crops are planted sequentially after irri- 

 gated rice field crops (^7 . I05). The rice-rice-vegetables cropping 

 pattern is most common where variety of medium, to high management 

 vegetables can be growii during the period between the production of 

 two rice crops. There is sufficient time for growing short-season 

 vegetable crops such as bunching onion ( Allium fistulosum L. ) , cabbage, 

 mustard, lettuce ( Lactuca sativa L.), radish, and bean. In certain 

 parts of Malaysia -where there are efficient irrigation and drainage 

 systems, high management vegetable crops such as hot peppers (. Capsicum 

 frutescens L. ) , tomato, yard long bean [ Vigna sinensis (Stickm; Savi 

 ex Hassk. Sesquipedalis Group], and cucumber are planted after rice (I65). 



Some double cropping vegetables with field crops are also possible 

 under irrigation during the warm season in North Florida {^3, 133) • 

 For example, southern pea, pigeon pea, wax and black beans ( Phase plus 

 spp . L. ) were successfully grown as second crops after early or mid- 

 season corn (55) • Under double cropping, these crops required high 

 plant populations and narrow row ^-ddths compared to lower popialations 

 and wider spacings when grown as single crops. >fith a snort -matux'ing 

 small grain crop like barley (Hordeuiia vulgare L.), it '-ra-s possible to 



