In present investigation was estimated the loss of soil by water erosion, which is the main environmental problem that limits food production because to affect adversely the ability of the soil to sustain productive agriculture, threatening to rural populations whose economy and nourishment are based on agricultural food production. To estimating soil loss, the Universal Soil Loss Equation (USLE for its acronym in English) and a methodology based on Geographic Information Systems (GIS) were used, which yielded results in quantity, intensity and location of the phenomenon. Were identified soils with medium, high, very high, and critical erosion degree in the districts of Lluta and Huanca from Caylloma province, being studied the trend to produce alfalfa since 12 years ago because is the permanent crop employee to feed cattle milk producer to meet the demand of the company GLORIA S.A., and...

En la presente investigación se estimó la pérdida de suelos por erosión hídrica, que es el principal problema ambiental que limita la producción de alimentos al influir negativamente en la capacidad del suelo para sostener una agricultura productiva, poniendo en riesgo a poblaciones rurales cuya economía y alimentación se basan en la producción agrícola de alimentos. En la estimación de pérdida de suelos se empleó la Ecuación Universal de Perdida de Suelos (USLE, por sus siglas en inglés) y una metodología basada en los Sistemas de Información Geográfica (SIG), los que generaron resultados en cantidad, intensidad y localización del fenómeno en estudio. Se identificaron suelos con erosión media, alta, muy alta y crítica en los distritos de Lluta y Huanca de la provincia de Caylloma, estudiándose la tendencia de la producción agrícola (12 años) de alfalfa, por ser...

“Context: Calcareous chitin, chitin, chitosan, and their modifications are used as bioadsorbents of metals and dyes that cause environmental pollution, endocrine disruption, and human diseases. Aims: To evaluate the selective bioadsorption of silver ions (Ag+ ) by calcareous chitin, chitin, and chitosan. Methods: Experimental and prospective study. The presence of functional groups of the bioadsorbents was identified by Fourier-transformed infrared spectroscopy (FT-IR), 1H-NMR spectroscopy and scanning electron microscopy (SEM). The Langmuir, Freundlich, and Elovich models were applied to describe the adsorption capacity of bioadsorbents according to granule size (20-40, 40-60, 60-80 meshes) and temperature (10, 20, and 30°C). Results: The FT-IR spectrum of calcareous chitin indicates the presence of carbonate (CO3 = 1420 cm-1 ), amide III (1313 cm-1 ), –OH groups (3441.90 cm-1 ), a...