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With the objective of evaluating of nutrient availability; its structure and water-air relationship under different management in inceptisol soil. The present work was carried out in the Experimental Agricultural Station "Alvaro Barba Machado". Three samplings were carried out in 2004, 2006 and 2007. They took four areas: two were planted with Leucaena leucocephala established 2 and 3 years old; one with natural grass and another with permanent crop. In all areas it were carried out chemical and physical analysis of soil, to depth of 0-10cm, 10-20cm and 20-40cm and an experiment under controlled conditions was developed, using corn as indicative plant. For statistical analysis was used the software STATGRAPHICS Plus 4.1 and SPSS ver. 8 on Windows 2000. The use of the tree Leucaena leucocephala cv Perú in an agricultural system increases the active layer of soil, this was expressed in the improvement of the soil states until 40cm of depth, such as matter organic, stable aggregate, structure factor and phosphor assumable. [ABSTRACT FROM AUTHOR]

The work was carried out in the experimental areas of the INIVIT, Santo Domingo during the years 2005 to 2006, with the objectives of evaluating the effect of the application of different organ-minerals combinations on the quality of the inceptisol soil and the yield of the banana tree FHIA-1 in the high density system. It was developed a field experiments in blocks at random with 8 treatments and 4 replicates using sugar cane filter cake, casting, NPK and ash. The best yield for plant and ha (15.84 kg and 57.02 t) was reached with the treatment sugar cane filter cake 14 kg + ash 5 kg + NPK 25%, overcoming the control without fertilization in 34.47% and to the NPK 100% in 11,08. The treatments where organic materials combined were applied with ash and 25% NPK produced the bigger positive effects on the physical and chemical parameters of increasing the soil quality of Inceptisol soil. [ABSTRACT FROM AUTHOR]

The experiment was mounted low controlled conditions, in the Center of Agricultural Investigations (CIAP), with the objective of studying the effect of different gallinaza levels on the physical and chemical conditions of five floor types: Pardo con Carbonatos, Pardo sin Carbonatos, Ferralítico rojo, Oscuro Plástico y Ferralítico cuarcítico amarillo rojizo lixiviado. The following treatments settled down: Witness, 2 t.ha-1 of Gallinaza, 4 t.ha-1 of Gallinaza, 6 t.ha-1 of Gallinaza, 8 t.ha-1 de Gallinaza, 10 t.ha-1 of Gallinaza. The results demonstrate that the good level of gallinaza for all the floor types, is of 6 t.ha-1. It could be proven that the gallinaza achieves an important effect on the assimilable P2O5 in all the floors in study. The effect of the material on the structure is marked in the Brown floors with Carbonates, Brown without Carbonates, red Ferralítico. It is demonstrated that with applying a reduced level of this organic payment (2 t.ha-1) positive answers were achieved in the floor. The practice of the use of the gallinaza lowers these approaches he/she makes viable its use from the ecological and economic point of view. [ABSTRACT FROM AUTHOR]

The present work was developed in the UBPC "Arcidez de Armas Pomo" of Topes of Collantes in Sancti-Spíritus, with objective of determining the relationships between properties of soil and yield, Thes parameters evidenced the sensibility to changes in Red Ferralíticos of Mountain soil. They took 50 floor samples to depth of 0-20 cm being applied 10 treatments of amendments and 5 repetitions for each one (a witness as reference, NPK, 4 t/ha compost, 15 t/ha Humid Bases Residual , 4 t/ha compost+ 4 t/ha Fosfatada Calcareous , 4 t/ha compost+4 t/ha Dolomita, 15 t/ha Humid Bases Residual+4 t/ha CF, 15 t/ha Humid Bases Residual+4 t/ha D, 4 t/ha D, 4 t/ha CF) under conditions controlled . The data were processed by the statistical packages Statgrafic 4.1 (for the regression relationships) and SPSS 8.0 (for the main components) in Windows 2000. The obtained results revealed that the pH KCl was an indicator capable to diagnose the problems of acidity of the soil, as well as a parameter that affects other structural properties and tenors of fertility. The properties of fertility (P2O5, K2O), physical properties (AE and FAITH) and of acidity (pH KCl and To the camb), they grouped in levels of main components, demonstrating their sensibility in the changes in the established system. [ABSTRACT FROM AUTHOR]

Se presentan los resultados de una investigación del uso de fosforita para mejorar el rendimiento de suelos tropicales. Se describen las condiciones del experimento y se evalúa el impacto de varios niveles de fosforita sobre el aumento de la materia orgánica. Se indica la influencia del tratamiento sobre los indicadores de fertilidad del suelo y del rendimiento de plantas de maíz.