This study aimed to price croplands in Rio Grande do Sul State (southern Brazil) and point which variables had the most significant impact on prices. The main purpose was achieved using multiple linear regression and principal component analysis. The variables used in this study were planted area, production, price, and yield of the commodities soybean, wheat, and corn. The period under analysis was from January 1994 to December 2017 (biannual observations). Multiple linear regression showed that five variables contributed to land pricing, being three related to soybean and two to wheat. Multivariate analysis grouped the investigated variables into clusters and indicated their influence, in addition to providing information on land prices and reducing variable dimensionality from fourteen original variables to three principal components to be analyzed. The two analyses complemented each other so that the croplands’ price was explained by three variables, in which two corroborated in constructing the pricing model for croplands.

The aim of the study was to evaluate the effects of integrated crop-livestock-forestry (ICLF) systems and the thinning of eucalyptus trees on the agronomical performance of soybean. Treatments consisted of cultivation under: crops under full sunlight (CFS) conditions; ICLF with triple-row tree configuration (ICLFT) in which trees were submitted to selective thinning in the fifth year after planting through removal of 50% of trees while maintaining triple-row bands; and ICLF with single-row tree band configuration (ICLFS) in which the lateral rows of the triple-row tree bands were subjected to systematic thinning at the fourth year after planting. The physiological and agronomical variables of the soybean crop were evaluated at the R5 and R8 reproductive stages during the eighth harvesting season (2018/2019). Soybean sampling was carried out at five random positions in the CFS and in four transects at distances of 3, 6, 10 and 15 m from the tree bands in both the north and south faces of the ICLF systems. There were no differences between soybean grown under the ICLF and CFS systems with respect to specific leaf area, plant density, lodging index and mass of a thousand grains. However, the ICLF increased dry leaf mass and leaf area index and reduced soybean plant heights. Soybean productivity was reduced by 26% in ICLF-T and 14% in ICLF-S, that is, a 12% reduction in the productivity loss with systematic thinning. It is concluded that ICLF reduces soybean productivity in the effective grain production area of the system, regardless of the degree of thinning, although systematic thinning by removing the lateral tree lines to conversion of triple-rows into single-rows minimizes the loss of soybean grain yield.

This study developed a multiple linear regression model to estimate the Average rural prices (ARP) in Mexico with information taken from the period 1999-2018. The variables used to generate this model were the supply and demand as represented by planted area, yield, exports and the ARP of Agave Tequilero and Mezcalero. The analysis was carried out through the multiple linear regression model (MLRM) with the least squares method and using the statistical package R. The following variables were identified as having a significant influence on the determination of the ARP: the yield of Agave Mezcalero (YAM), the ARP of Agave Tequilero and the new planted area of Agave Tequilero (NPAATt-6) with an adjustment of 6 periods. Overall, three models were generated: model 2 was considered the most appropriate because it allows carrying out future forecasts with the new planted area with Agave Tequilero with 2 independent variables. YAM and NPAATt-6 were useful in predicting 65.5% of the annual variations in the ARP and helped recognize the negative trend of the Agave price from 2020 to 2024. Therefore, the use of the MLRM to estimate the Agave ARP can be a useful tool in predicting the performance of this crop.

Soft tissue mineralization and epithelial ulceration are common findings in dogs with uremia, being commonly reported in the gastrointestinal tract, lungs and pleura. This report described a case of nasal mucosal mineralization and ulceration contributing to recurrent epistaxis in a dog with chronic renal failure and uremia. A dog with recurrent epistaxis accompanied by elevated urea and creatinine was hospitalized. Platelet count and coagulation tests were within normal limits. Chronic renal failure was diagnosed, and the dog was euthanized. On necropsy, the kidneys were small, with an irregular capsular surface. The nasal conchae were slightly reddish. Histopathology revealed chronic glomerulonephritis, with gastric mineralization and bilateral parathyroid hyperplasia. Vascular and basal lamina mineralization, epithelial ulceration and hemorrhage were seen in the nasal conchae. The observed findings indicated that nasal mineralization and ulceration were caused by uremia. The severity of histopathological findings suggested that nasal mineralization/ulceration may have caused or at least contributed to epistaxis in this dog. We hope to stimulate further investigations into possible association between uremia, nasal mucosa mineralization/ulceration and epistaxis in dogs.

Fish farmers’ dependence on costly formulated fish feed has affected their income. The cost of formulated feed is also constantly rising. Efforts to mass-produce the locally available natural resource, namely water flea (Moina sp.), were initiated as an alternative to the commercially formulated fish feed. This study evaluates the most suitable growth medium for commercially culturing Moina sp. And Chlorella sp. And studies the effect of their growth activity on water quality. In this study, the growth behaviour of Moina sp. And Chlorella sp. Was monitored individually before Moina sp. Was cultured together with Chlorella sp. In a growth medium. Chlorella sp. Was cultured in different mediums (BG-11, Bristol, and organic fertiliser). The first generation of Moina sp. Took 96 h to mature and begin to reproduce, while the next generation took a shorter time (from 24h to 48 h). The brood size was between five and 15 neonates, while the maximum brood count recorded was eight. The Chlorella sp. Culture had grown well on Day 5 (555.33 ug/L); thus, it was introduced with Moina sp. On Day 6. Although an organic fertiliser medium provided the optimum conditions for Chlorella sp. Growth, it slightly inhibited the Moina sp. Growth due to higher ammonia (NH3) concentration. However, the organic fertiliser medium could sustain Chlorella sp. Growth while being ingested by Moina sp. The growth activity of both species slightly affected the water quality. Meanwhile, the increase in ammonia (NH3), carbon dioxide (CO2), and calcium carbonate (CaCO3) was recorded. In conclusion, organic fertiliser is the best medium for Chlorella sp. Growth, which is the main food source for Moina sp. Culture.

This study measured the accumulation of cadmium (Cd), lead (Pb), and copper (Cu) in Brassica juncea grown using the hydroponic method in a water environment contaminated with these heavy metals. The accumulated metal content in each part of the plant was monitored after one, three, and six weeks of exposure. The concentrations of Cd, Cu, and Pb in the biomass of B. juncea stems. The translocation factors of Cu, Cd, and Pb from shoots to stems and shoots to leaves were less than 1.