Gamete production and fertilization influence zygote production. While gamete production is correlated positively with body size, individual fertilization success may be a function of population density. Usually it is assumed that when high population density leads to reduced body size and gamete production, per capita zygote production is diminished. This field study of the sea urchin Diadema ...

Maintaining soil fertility and the microbial communities that determine fertility is critical to sustainable agricultural strategies, and the use of different organic fertilizer (OF) regimes represents an important practice in attempts to preserve soil quality. However, little is known about the dynamic response of bacterial communities to fertilization regimes across crop growth stages. In thi...

Nitrogen addition to soil can play a vital role in influencing the losses of soil carbon by respiration in N-deficient terrestrial ecosystems. The aim of this study was to clarify the effects of different levels of nitrogen fertilization (HN, 200 kg N ha year; MN, 100 kg N ha year; LN, 50 kg N ha year) on soil respiration compared with non-fertilization (CK, 0 kg N ha year), from July 2007 to S...

Background:Nitrogen plays a crucial role in growth cycling and development, thereby influencing the plant productivity. Understanding interactions between nitrogen uptake with different irrigation fertilizers could provide valuable insight for optimizing tomato production. Hence, this study aimed to investigate effect of on production under fertilizer regimes. Methods:The field experiment was c...

The objective of this study was to evaluate the performances three cassava genotypes on yield, physiology and morphological traits under different fertilization regimes. A field experiment conducted in a split-plot design for two consecutive seasons Mansa district Luapula Province Northern Zambia highly weathered Chromi-haplic Acrisol soils. Four regimes, control-M3, lime-M1, NPK fertilizer-M4 ...