Gesso Agrícola

Engessul Agricultural Gypsum: Deepens the roots and increases your profit.

ooooooooooIt is important to distinguish the utilization of agricultural gypsum from that of limestone. The two products are not competitors, they complement each other. Limestone acts on the surface layer of soils (up to 25 cm in depth), correcting acidity and increasing the pH on the layer it has been incorporated to. The agricultural gypsum acts on the deepest layer of soils, attacking acidity sources without, however, altering their pH.

ooooooooooAside from supplying calcium and sulfur nutrients to the deepest layers of soils, the agricultural gypsum neutralizes toxic aluminum and increases soil porosity, thus decreasing resistance to the penetration of roots, which can seek the nutrients and water they need in broader horizons. In a large portion of Brazilian soils, the chemical barrier formed by the presence of toxic aluminum is accountable for the lesser root development of several crops as compared to the soils of other countries which do not present this problem, as shown in the following chart:

Soils
Crops
Depth of Root System (cm)
Brazil
Beans
20
Maize
20
Sugarcane
60
Other Countries
Beans
50 - 70
Maize
100 - 170
Sugarcane
120 - 200
Source: Kafler, N. F. (1986)

ooooooooooResearch has demonstrated that the use of agricultural gypsum increases the efficiency of nutrient absorption, from those of greater mobility, like nitrogen, to those of lesser mobility, like phosphorus. The following chart shows the absorbed nutrients (contained in the hay and grains) of a wheat crop submitted to a hot spell at the time of blooming.

Situation
Absorbed Nutrients (kg/ha)
N
P
K
Ca
Mg
S
Without Gypsum
80
15
53
12
11
7
With Gypsum
120
22
80
16
16
12
Fonte: Circular nº 32 - EMBRAPA

ooooooooooThe increase in the production of annual crops as a result of the utilization of agricultural gypsum has been observed in experiments undertaken throughout the country, as demonstrated in the examples which follow:


Example 1:

ooooooooooResponse of maize and oats to agricultural gypsum in a Clayey soil with 17% clay (Source: Boletim Técnico da EPAGRI, adapted from Bianchi et al. – 1990, quoted by Ernani et al. - 1992).

Gypsum
Maize - Oat
Grains - Dry Matter
(Harvest 89/90)
(Harvest 89/90)
t/ha
t/ha
%
t/ha
%
0,0
6,6
100
3,1
100
0,5
7,2
109
3,5
113
1,0
7,2
109
4,1
132
2,0
7,3
111
3,7
119
4,0
8,1
123
3,7
119
8,0
7,4
112
3,7
119
Source: Boletim Técnico nº 122 - EPAGRI-SC

Example 2:

ooooooooooEffect of agricultural gypsum application to soil, in the productivity of annual crops submitted to hot spells at the time of blooming (Source: Circular Técnica nº 32 – EMBRAPA).

Situation
Maize
Wheat
Soy
(tons/hectar)
Without Gypsum
3,2
2,2
2,1
With Gypsum
5,5
3,5
2,4

ooooooooooMore information on the subject can be obtained in the Boletim Técnico no. 122 of EPAGRI – Empresa de Pesquisa Agropecuária e Extensão Rural de Santa Catarina S.A., in the Circular Técnica nº 32 ISSN 0102-0102 dated October 1997, of EMBRAPA – Empresa Brasileira de Pesquisa Agropecuária, in the Proceedings I and II of the Seminar on the use of Gypsum in Agriculture (EMBRAPA, IBRAFOS) and in the Newsletter Agricultural Gypsum in the Improvement of Root Environment in the Subsoil.

Remember to always seek advice from an agronomist
or an agricultural technician in your region.


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