Page 6 - Vol.37-No.7

IRRIGATION

POLMAC HIGH PERFORMANCE SPRAYING MACHINES

REDUCING AN ENVIRONMENTAL IMPACT

Research & Development. Thanks to
our specialist team we produce tech-
nical drawings, prototypes and new
production moulds, while maintaining
Polmac Srl has been in the market of constant product innovation and cus-
machines for the distribution of agri- tomization to satisfy the requirements
culture pesticides and herbicides since of the Italian and International market.
1972. Our products are produced to
control and measure the management,
mixing and distribution of chemicals
manufacturing a complete weeding
in agriculture, in order to reduce to a
machine targeted exclusively for the
minimum the environmental impact and
Italian market. Over time, we special-
contact with these products by opera-
ized in the production of components
tors. Greater precision in dosing, more
and accessories for machines for the
safety in performing activities, compli-
distribution of pesticides and herbi-
ance with the most stringent rules and
cides, while also expanding our sales in
the best end results. Our primary ob-
foreign countries. Every year we invest
jective had been that of designing and
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Circle 5 on enquiry card
NPK FERTILIZERS: WHAT THEY ARE, WHAT THEY
ARE FOR AND HOW TO CHOOSE THEM

The formulation of the fertilizer, that K (Potassium): is essential for the wa-
is the proportion between the various ter’s absorption and balance of plants.
elements, is to provide the right quan- It contributes to the development of
tity of macronutrients compared to the strong and robust tissues, in order to
objective to be reached. resist against diseases and extreme
temperature changes. Potassium also
NPK fertilizers are so called because The functions of macronu- improves the flavor, color and texture
they are composed of three primary trients of fruits.
macronutrients: nitrogen (N), phos-
N (Nitrogen): is essential for plants
phorus (P) and potassium (K). Such Solid or liquid form: the
growth, especially for the green parts,
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because it is the main element in the
for plants metabolism, promoting the
construction of plant cells and chloro- NPK fertilizers are available in two
growth and the well-being of crops.
phyll. Nitrogen persists in the soil for a IRUPV VROLG DQG OLTXLG 7KH ÞUVW XVX-
Hydro Fert has developed the Gran relatively short time, so it is necessary ally as granules or powder, is suitable
Foliar line for all the needs of plants. to fertilize the ground several times a for soil application or top dressing. Its
The reason is that not exists just one year or use a slow-release fertilizer. effect is longer lasting, because it re-
NPK fertilizer but several types ac- leases substances as it degrades.
P (Phosphorus): strengthens the roots,
cording to the percentage of macro-
improves flowering and promotes Instead, the liquid form is ideal in
nutrients. A “20-20-20” NPK fertilizer
photosynthesis. It is therefore essen- case of fertigation, to faster bring nu-
contains, for example, 20% nitrogen,
tial during all stages of plant life: from trients to the roots. In addition, in par-
20% phosphorus and 20% potassium,
birth to flowering and fruiting. Lack of ticular cases, it can be used directly
while a “10-10-30” fertilizer contains
phosphorus can cause weak growth on the leaves.
10% nitrogen, 10% phosphorus and
and greater weakness to insects and
30% potassium.
diseases. NPK fertilizer: which one
to choose?
The premise is that there is not an
absolute best fertilizer. The choice
depends on various factors: the type
of plant, the composition of the soil,
the dosing period, the method of ap-
plication, etc.
Circle 6 on enquiry card
4 Vol. 37 No. 7