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Field selection of acid soil tolerant leucaena from leucaena leucocephala x leucaena diversifolia crosses in a tropical oxisol

Field selection of acid soil tolerant leucaena from leucaena leucocephala x leucaena diversifolia crosses in a tropical oxisol

Tropical Agriculture 67(1): 2-8

Leucaena diversifolia as a source of acid-soil tolerance for leached tropical soils was confirmed. In L. leucocephala .times. L. diversifolia crosses tolerance was transmitted to all generations. Selection of vigorous, deep-rooting, acid-soil tolerant trees in the populations was facilitated by their growth in a cerrado Oxisol with high A1 saturation. Adequate applications of single superphosphate, dolomite, gypsum and potassium chloride did not prevent this selection. The basis for acid-soil tolerance is unknown, but the results indicate the involvement of efficient root uptake of Ca in competition with exchangeable A1.

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