Agriculture Reference
In-Depth Information
) and 5-year mean (■) air
temperatures at Rothamsted, UK. Horizontal line designates the mean air temperature for
the period 1878-1990. Adopted from
http://www.rothamsted.ac.uk/
FIGURE 10.4
From 1878 to 2009, change in annual mean (
ᴏ
Variation in precipitation affects relative humidity (RH) in an area. The
RH determines level of disease intensity for many phytopathosystems.
Magnaporthe oryzae
(Ou, 1985) requires over 89% RH whereas 70% RH
is sufficient for
Alternaria solani
(Escuredo et al., 2010) to infect foliage
of rice and potato, respectively. However, spore production shows a sig-
moid trend in most of the phytopathosystems (Berger et al., 1997; Castano
et al., 1989; Rouse et al., 1980; Villareal et al., 1981). The production of
spore increases rapidly and then decline gradually.
10.2 IMPACT OF AIR POLLUTION AND STRATEGY AGAINST
CLIMATE CHANGE
Due to over deforestation in the humid tropic for intensive agriculture the
global carbon percentage has increased considerably (IPCC, 1996). Vari-
ous spatio-temporal scales, reasonably changes in climate, are based on
three parameters. First, the effect on experience basis, second category
comprises with extrapolation from expert knowledge/system, and studies
