Potencialidades E Limitações Agrícolas De Solos Em Assentamento De Reforma Agrária No Município De Chapadinha-Ma

Abstract

Resumo -Pela importância que a reforma agrária representa para o Brasil, as áreas onde são assentadas as famílias deveriam ter solos com boas potencialidades agrícolas. Objetivou-se neste trabalho classificar os solos e avaliar as suas potencialidades e as limitações agrícolas no assentamento de reforma agrária Malhada do Meio, localizado no município de Chapadinha-MA. Foram abertos quatro perfis em pontos representativos das diferentes paisagens. Amostras de solos foram coletadas para a realização das análises de caracterizações químicas e granulométricas. Os solos estudados foram classificados como Neossolo Flúvico, Gleissolo Háplico Tb Distrófico cambissólico, Plintossolo Argilúvico Distrófico abrúptico e Plintossolo Pétrico Concrecionário êndico. Concluiu-se que se deve fazer um estudo prévio das potencialidades e limitações agrícolas dos solos para definir áreas para projetos de reforma agrária.Palavras-Chave -plintita, solos do Maranhão, Neossolo, Gleissolo, Plintossolo.Abstract -The importance of land reform is to Brazil, the areas where they are resettled families should have soils with good agricultural potential. The objective of this study was to classify soils and evaluate their strengths and limitations in agricultural land reform settlement Malhada do Meio, located in the municipality of Chapadinha, MA. Four profiles were opened at representative points of different landscapes. Soil samples were collected for analyzes of chemical and textural characteristics. The soils were classified as Neossolo Flúvico, Gleissolo Háplico Tb Distrófico cambissólico, Plintossolo Argilúvico Distrófico abrúptico and Plintossolo Pétrico Concrecionário êndico. In conclusion, it should make a preliminary study of agricultural potentialities and limitations of the soil to define areas for agrarian reform projects.

Remote Sensing and Geostatistics Applied to Ndvi, Kc and Productive Parameters in Irrigated Corn Crop

“…It is important to observe not only the average value, but the variation in the regions that concentrate the highest sand/clay content, as they help to define soil management. In this scenario, Azevedo and Bueno (2016) in the survey and classification of soils, show that the potential to collaborate with the use and Irriga, Inovagri, Botucatu, v. 28, n. 3, p. 535-544, julho-setembro, 2023 management of soils has been offering better conditions for the development of areas effectively, when using the correct techniques according to the physical and chemical characteristics of each production area. In Figure 3 it can be seen that from the 17 DAP the study area presented variation in the values of the NDVI starting from the interval with the value 0.07 to 0.59, such amplitude due to the staggering of planting, being identified a difference between the dates of planting, thus allowing it to be identified up to 36 DAP and after 91 DAP.…”

“…According to Table 1, it can be seen that the correlation between productivity and NDVI values during the corn cycle has shown to increase with the increase in days after planting (DAP). With 17 DAP it was -0.41 being considered an average negative correlation, at 69 DAP with a value of 0.32 it exhibits an average positive correlation, which continues to grow up to 121 DAP with 0.60 classified as a strong correlation, according to the Pearson classification adapted by Bermudez-Edo, Barnaghi and Moessner (2018). Silva et al (2016) in their research work pointed out that the NDVI is a tool that can be used to estimate corn productivity, between stages V3 and V9, with correlations equal to or greater than 0.65 classified as a strong correlation, the which, shows a result similar to that found in this research.…”

Fertilidade do solo de um horto as margens do rio Inhangapi e os impactos qualitativos sob o corpo hídrico

“…As funções fundamentais do solo, relacionado à manutenção da vida, abrangem uma diversidade de seres vivos, tal como minhocas, fungos e microrganismos aptos para decompor a matéria orgânica, contribuindo para a conservação das suas propriedades físicas, salvo sua fertilidade (VEZZANI; MIELNICZUK, 2009). O uso mais eficaz e racional do solo é relacionado necessariamente em conhecer bem seus atributos, e a partir disso propor técnicas de manejo mais adequadas para as condições locais (AZEVEDO; BUENO, 2016).…”