Spatial variability of soil fertility and its relation with cocoa yield

Revista Brasileira de Engenharia Agricola e Ambiental

Sodré, George A.¹  Franco, Laís B.²  Santos, Railton O. dos²  Menezes, Agna A.²  Silva, Samuel A.³ 

[1] Comissão Executiva do Plano da Lavoura Cacaueira, Ilhéus, Brazil;Universidade Estadual de Santa Cruz, Ilhéus, Brazil;Universidade Federal do Espírito Santo, Alegre, Brazil

关键词: precision agriculture;    cocoa;    spatial variability;    fuzzy logic.;   

DOI  :  10.1590/1807-1929/agriambi.v21n2p88-93

学科分类：农业科学（综合）

来源: Universidade Federal de Campina Grande * Centro de Ciencias e Tecnologia

【 摘 要 】

The knowledge on the spatial variability of soil properties and crops is important for decision-making on agricultural management. The objective of this study was to evaluate the spatial variability of soil fertility and its relation with cocoa yield. The study was conducted over 14 months in an area cultivated with cocoa. A sampling grid was created to study soil chemical properties and cocoa yield (stratified in season, off-season and annual). The data were analyzed using descriptive and exploratory statistics, and geostatistics. The chemical attributes were classified using fuzzy logic to generate a soil fertility map, which was correlated with maps of crop yield. The soil of the area, except for the western region, showed possibilities ranging from medium to high for cocoa cultivation. Soil fertility showed positive spatial correlation with cocoa yield, and its effect was predominant only for the off-season and annual cocoa.

【 授权许可】

CC BY