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Sequential Cropping as a Function of Water in a Seasonal Tropical Region

Ricardo Radulovich

Dep. of Agricultural Engineering, Univ. of Costa Rica, San José, Costa Rica



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Fig. 1 Mean monthly rainfall for the two stations of the study, in Alajuela (La Central, solid squares) and San Pedro (Sabanilla, solid circles), 20-yr averages

 


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Fig. 2 Bean and maize yields as affected by date of planting. Data used are from Alajuela (Haplustand soil) for all plantings of (a) a single bean cultivar (Huetar) and (b) a single maize cultivar (Diamantes). In the equations, x represents days of the year. ** Significant at the 0.01 probability level

 


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Fig. 3 Relationship between cumulative rainfall and second-planting yields of (a) bean (cv. Huetar) and (b) relative yields of bean and maize (cv. Huetar and Diamantes, respectively) for Alajuela (Haplustand soil). Amounts of rainfall used are for 60 d after planting for bean and 80 d after planting for maize. *,** Significant at the 0.05 and 0.01 probability levels, respectively

 





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