Search
Now showing items 1-10 of 12
Fertilidad de Typic Dystrandepts de Costa Rica. I. Metodología, acidez y cationes (Ca, Mg, K, Fe, Mn, Zn, Cu)
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1984-04)
The fertility of nine Typic Dystrandeprs of Costa Rica was studied under laboratory and greenhouse conditions. Chemical soil analysis, retention curves for K, Mg. Mn, Zn, Qu, P, B and S. foliar analysis from sorghum plants ...
Fertilidad de Typic Dystrandepts of Costa Rica. II. Aniones (N, P, B, S, Mo), materia orgánica y textura
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1984-04)
The studied anions present similar nutritional characteristics in the nine Typic Dystrandepts of Costa Rica. P deficiency is the main lümiting problem, and in practice, the only one. P retention percent varies between 80 ...
Estudio de la antracnosis en Guanábana (Annona muricata L.). I. Efecto en la morfología de las hojas
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1984-04)
Leaves of Annona muricata L. (soursop) were inoculated with a suspension of Colletotrichum gloeosporioides Penz, conidia under greenhouse conditions. Samples were taken at different time intervals and prepared for light ...
Presencia del virus del mosaico del maíz en el Estado de Tabasco, México
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1984-04)
An outbreak of maize mosaic virus (MMV) occurred in corn fields at Nacajuca, Tabasco in Mexico on March of 1981. Disease incidence was about 70%, and yield of infected plants was severely reduced. Virus identification was ...
Interacciones entre el acido succínico 2,2 - dimetil hidrazida (daminozida) y otras hormonas en la iniciación floral del manzano
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1984-04)
Spur deleafing, defruiting and daminozide sprays have been carried out in combinations with injections of different hormones to spurs of the apple cultivar Egremont Russett and their effects on flower bud formation determined ...
Efectos del ácido succínico 2,2 - dimetil hidrazida (daminozida) en los niveles de hormonas endógenas en semillas inmaduras y en la iniciación floral en manzano
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1984-04)
Spraying apple trees (cv. Cox's Orange Pippin) with 2 000 ppm daminozide 2 weeks after full bloom in creased return bloom the following year, Analyses of extracts of seeds removed from fruits at different times after ...
Notas preliminares sobre el barrenador de los brotes terminales del pino, Rhyacionia frustrana (Lepidoptera; Tortricidae) en Costa Rica
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1984-04)
Young plantations of pine species, Pinus caribaea var, hondurensis, P. oocarpa, P elliotti, P. canariensis P kesiya and P. radiata, have been found sererely attacked by the tortricid, Rhyacionia frustrana Comstock in ...
El rambután (Nephelium lappaceum); composición química del fruto y su conservación
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1984-04)
The chemical composition of seed, flesh (aril) and peal of rambutan (Wephelium lappaceum) is reported for three different stages of maturity. Some morphological characteristics which differences it from Litchi chinensis ...
Actividad fito-estrogénica del trébol blanco in vitro e in vivo y su fluctuación en relación a variables climáticas. Estado metabólico y fermentación ruminal
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1984-04)
There is no clear understanding of estrogen activity in white clover, nor its effects on animal fertiłity. Because this plant is a major protein source for livestock in Latin America, estrogen activity was measured during ...
Absorción de exponente 15 N de los fertilizantes en una rotación Allium sativum - Setaria italica, en lisímetros
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1984-04)
Nitrogen uptake by an annual rotation of garlic (Allium sativum/ and millet Setaria italica) from tagged urea and ammonium sulfate applied toa Typic Haplus toll in a battery of differential weighing lysimeters was studied ...