In the Brazilian Southwestern Amazon, food security agriculture predominates in smallholder farms where cassava cultivation is conducted under conventional tillage (CT). We investigated the impact of conservation agriculture on soil C content and organic matter (SOM) composition in an Acrisol (Acre State) cropped with cassava and maize. / Editores:...
O presente trabalho visou determinar o grau de concentração do mercado internacional de milho em grão. Foram utilizadas as seguintes variáveis: (a) Quantidade produzida (t) por país, (b) Quantidade (t) exportada por país, e (c) Quantidade (t) importada por país. Foram determinados os seguintes índices de concentração: (a) razão de concentração CR(k...
O biocarvão é uma forma estável de carbono que proporciona melhoria em diversos atributos do solo e disponibilidade de nutrientes para as plantas. Os objetivos deste trabalho foram avaliar as características químicas do biocarvão e o efeito sobre a produção de biomassa do milho. O experimento foi conduzido na Embrapa Semiárido, Petrolina, PE utiliz...
ABSTRACT - The objective of this work was to evaluate the nutrient availability for corn (Zea mays) grown successively in pure and ground biotite schist and biotite syenite rock samples. The rock powders were subjected to chemical, physical, and mineralogical characterization, and the availability of the elements released to the plants was determin...
The response of second crop corn to nitrogen application was evaluated at different stages of development. The experiment was conducted on the São Carlos farm in Vilhena ? Rondônia/Brazil. The factors under study included the splitting of N associated with the application of coated urea with NBPT (45-00-00) in top dressing. The control group (witne...
Published in IOP Conference Series: Earth and Environmental Science
A semi-automatic boom sprayer was developed to make it easier for farmers to spray pesticides on corn plants. The study was conducted with two treatments at the corn age of 15 days and 30 days. A test was carried out by comparing the performance of the semi-automatic boom sprayer and the performance of the generally used knapsack sprayer. This rese...
Apesar do aumento da demanda e da área cultivada com milho nos últimos anos, o rendimento da cultura ainda é baixo no Acre. O baixo aporte tecnológico nos cultivos e o uso reduzido de estratégias direcionadas ao manejo da fertilidade e conservação dos solos, além do elevado preço dos insumos, figuram dentre os principais fatores que contribuem para...
Published in Food chemistry
A portable near-infrared (NIR) spectrometer coupled with chemometrics for the detection of fumonisin B1 and B2 (FBs) in ground corn samples was proposed in the present work. A total of 173 corn samples were collected, and their FB contents were determined by HPLC-MS/MS. Partial least squares (PLS), support vector machine (SVM) and local PLS based o...
Published in IOP Conference Series: Earth and Environmental Science
Study the response of the corn crop / Bohooth 106 cultivar, at different levels of nitrogen fertilizer (NF) and cultivation distances (CD). were tested under three levels of nitrogen fertilizer NF of 200, 250 and 300 kgN.ha-1, and two levels CD of 15 and CD of 20 cm The split -split plot arrangement in RCBD with three replications was used. The res...
