The effect of lime and phosphorus on the yields of velvet beans, crotalaria, cowpeas, and soybeans, is presented for eight crops harvested in the acid soil types Fajardo Clay and Catalina Clay, of Puerto Rico. Data for distances of plantings, age of crops, green and dry-weight yields for each of two consecutive crops of the leguminosae in each of four fields, and for the mean dry-weight yields of all crops are presented. Analysis for the total sum of squared deviations of the dry weight for the various crops, is also presented and discussed. Velvet beans, the highest yielder, gave, in the absence or presence of lime and phosphorus, mean green weights of 83.5 and 110.0 hundredweights per acre, respectively, equivalent to mean dry weights of 17.4 and 22.6 hundred weights per acre.

There are about 5,000 acres of high salty Aguirre clay in Lajas valley, in southwestern Puerto Rico, that need reclamation to be fit for crop growth. A field experiment was carried there including four treatments: check, leached, sulphur, and gypsum. The leached treatment consisted of preliminary washings with water. The irrigation source was the same used successfully in the good adjacent sugar cane fields for many years. The crops planted were rice and then, sugar cane. Data reported here include yields of rice in terms of whole plant and seed and of sugar cane in terms of tonnage and sugar content as well as conductivity values of the cane juices. Data are also reported for the pH and the specific conductance values for soil samples taken after the cane was harvested. Chemical analyses of the water supplies are also presented. No significant results in crop yields due to treatments were obtained. Covariance statistical analyses were made to find whether the salt content of the first 9-inch soil layer, or the salts in the cane juices had significant effects on the yields of cane. Results obtained were not significant. Reclamation of salty Aguirre clay with sulphur and gypsum was not successful. It was found that the irrigation water used was high in magnesium salt. These high magnesium waters might be a cause for the negative results.