Tropical and Subtropical Agroecosystems

Tropical and Subtropical Agroecosystems

Anthropogenic and climate influences on biogeochemical dynamics and molecular-level speciation of soil sulfur.

The soil environment is a primary component of the global biogeochemical sulfur (S) cycle, acting as a source and sink of various S species and mediating oxidation state changes. However, ecological significance of the various S forms and the impacts of human intervention and climate on the amount and structural composition of these compounds are still poorly understood. We investigated the lon...

ارزیابی کارایی تسترهای ذرت مناطق معتدله در غربال گری ژرم پلاسم های مناطق حاره ای و نیمه حاره ای

 Maize germplasm from CIMMYT is genetically most diverse in the world and is exceedingly useful for broadening the genetic base of temperate maize germplasm. It is a tough challenge for improving efficiency and reliability of extracting the best suitable material from exotic germplasm. So, this study was done to determine the optimum number of testers and suitable testers for screening a maize ...

Forecasting Challenges Associated With Tropical Cyclones Within Subtropical Gyres

This case study examines the complex history of a tropical storm that formed southeast of a large subtropical gyre. In real time the tropical stormwas incorrectly identified as being two separate storms, and at one time was mislocated by 465 km. The unique forecast problems associated with tropical cyclones within a subtropical gyre are described. The tropical storm propagated around the gyre a...

Forests and Grasslands as Cradles for Agriculture

1. Humans as Parts of Forest and Grassland Ecosystems 1.1 Human Subsistence in Forests and Grasslands Based on Gathering and Hunting 1.2 Transition of Natural Communities into Seminatural Communities 2. The Development of Agroecosystems—Agroforestry was the Origin 2.1. The Transition from Food Collection to Food Production 2.2. Agroforestry—What Does it Mean and How Does it Work? 2.3. Nutrient ...