ESTIMATING SUPPLY RESPONSE FUNCTIONS FOR SUMMER MAIZE CROP IN EGYPT

Zinc, Iron, Manganese and Copper Uptake Requirement in Response to Nitrogen Supply and the Increased Grain Yield of Summer Maize

The relationships between grain yields and whole-plant accumulation of micronutrients such as zinc (Zn), iron (Fe), manganese (Mn) and copper (Cu) in maize (Zea mays L.) were investigated by studying their reciprocal internal efficiencies (RIEs, g of micronutrient requirement in plant dry matter per Mg of grain). Field experiments were conducted from 2008 to 2011 in North China to evaluate RIEs...

Aggregate Export and Food Crop Supply Response in Tanzania

Tanzania is among the many African countries that have engaged in agricultural liberalisation since the mid-1980s, in the hope that reforms which introduce price incentives and efficient marketing will encourage producers to respond. This paper assesses that claim by examining the supply response of agricultural output in Tanzania. Our estimates suggest that agricultural supply response is quit...

Estimating neural response functions from fMRI

This paper proposes a methodology for estimating Neural Response Functions (NRFs) from fMRI data. These NRFs describe non-linear relationships between experimental stimuli and neuronal population responses. The method is based on a two-stage model comprising an NRF and a Hemodynamic Response Function (HRF) that are simultaneously fitted to fMRI data using a Bayesian optimization algorithm. This...

Autonomous Navigation in Maize Crop Fields

Scope The autonomous navigation in agricultural environments allows also to carry out autonomous operations of special interest in agriculture environments. The goal of an autonomous navigation is to cover all the required areas where the operation has to be made. We take into account different navigation strategies using proper sensors being also able to detect references which makes possible ...

Acreage response and produdion supply functions for soybeans