To guide soil fertility investment programmes in sub-Saharan Africa, better understanding is needed of the relative importance of soil and crop management factors in determining smallholder crop yields and yield variability. Spatial variability in crop yields within farms is strongly influenced by variation in both current crop management (e.g. planting dates, fertilizer rates) and soil fertili...

[1] A greater abundance of shrubs in semiarid grasslands affects the spatial patterns of soil temperature, moisture, and litter, resulting in fertile islands with potentially enhanced soil metabolic activity. The goal of this study was to quantify the microsite specificity of soil respiration in a semiarid riparian ecosystem experiencing shrub encroachment. We quantified the response of soil re...

The Status of the World's Soil Resources Report identi_ed in 2015 soil pollution as a major threat to all services provided by soils (FAO and ITPS, 2015). This paper develops spatial growth model for an agricultural economy where di_uses soil. In order produce, needs fertile soil, which is naturally bounded amount available land. Although production entails pollution, locations can protect thei...

One of the reasons reduction agricultural land is degradation soil processes. The main negative processes occurring in soils and leading to their are erosion (water wind), humus content soil. A significant spread developing due action natural anthropogenic factors leads a critical decrease fertility. By washing away upper fertile layer formation large gullies improper tillage, formed. In order ...

Biomass of legumes grown as catch crops improves soil properties and thus soil conditions for following crops. The aim of this study was to evaluate the effect of field pea (Pisum sativum L.) grown as a catch crop and used for green manure on soil properties and yielding of spring barley (Hordeum vulgare L.). Field experiments were conducted in 2008-2011 in the randomized block design with ...