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FUNDAMENTALS OF SOIL PRODUCTIVITY IMPROVEMENT
ISMAILOV DAULETBAY UZAKBAEVICH
Doctor of Philosophy in agricultural Sciences. (PhD)
Karakalpakstan institute of agriculture and Agrotechnologies.
ISMAILOV UZAKBAY EMBERGENOVICH
Doctor of agricultural Sciences, Professor
Karakalpakstan institute of agriculture and Agrotechnologies.
Annotation:
This work explores the fundamental principles and practices essential for
improving soil productivity, a key factor in sustainable agricultural development. It discusses the
physical, chemical, and biological properties of soil that influence its ability to support plant
growth, such as soil structure, nutrient availability, organic matter content, pH balance, and
microbial activity. The study also evaluates various soil management techniques including crop
rotation, fertilization, organic amendments, conservation tillage, and erosion control. Emphasis is
placed on integrated soil fertility management as a holistic approach to enhancing and
maintaining productive soils over the long term.
Keywords:
soil productivity, soil fertility, soil management, soil health, nutrient cycling, organic
matter, soil structure, sustainable agriculture, soil improvement, fertility enhancement.
In the agriculture of our republic, cotton is currently one of the main crops. Currently, the sown
areas of all cotton-growing farms have been allocated to farms. Conditions have been created for
increasing agricultural practices, crop yields, and soil fertility.
Cotton is a crop that requires specific agrotechnical measures. Its yield depends on various
internal and external factors, among which soil is the most fundamental phenomenon,
fundamentally influencing crop yields. Based on the physical and chemical properties of the soil,
the growth and development of the cotton root system depends on the physical and chemical
properties of the soil and affects the development, yield, and quality of the above-ground part of
the plant. Our farmers have long used organic fertilizers to increase soil fertility.
The value of local fertilizer is that it contains a large amount of micro and macro elements
necessary for the normal growth and development of the plant. One ton of manure contains 5 kg
of nitrogen, 2.5 kg of phosphorus, 6.0 kg of potassium, 115 g of manganese, 2.5 g of boron, 5 g
of copper, and 10 g of lead.
The lower reaches of the Amu Darya are typically poorly supplied with organic matter,
comprising approximately 0.5-1.3% of the majority of irrigated land.
Due to the continuous cultivation of cotton for several years under irrigated farming conditions,
the depletion and decrease of organic matter in the soil led to the loss of favorable physical
properties and a decrease in nitrogen elements. Experiments conducted over many years at the
Karakalpakstan Agricultural Research Institute have shown that alfalfa is beneficial for
increasing soil fertility, preventing soil salinization, and reducing wilt disease.
After the third year of alfalfa, up to 200-300 kilograms of biological nitrogen accumulate in the
soil per hectare. Alfalfa not only accumulates organic matter in the soil but also plays a
significant role in improving its physical and chemical properties. It increases the number of
high-water resistance aggregates in the soil with a size of 0.25 mm. Cotton-alfalfa crop rotation
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is one of the key measures for continuously increasing soil fertility. Furthermore, applying local
fertilizers (manure) to cotton fields has a positive effect on the nutrient content in the soil.
With the regular introduction of cotton-alfalfa crop rotation, the soil composition becomes
enriched with organic matter, the amount of humus increases, and as a result, the fertility of
irrigated soil increases.
When implementing a crop rotation system that includes perennial grass crops, the soil
composition is enriched with organic matter containing 9-12 tons of carbon, protein, and other
substances per hectare.
The remains of three-year-old alfalfa are the most important basis for enriching the soil with
organic matter. Plant residues contribute to the enrichment of the soil with organic matter. In this
case, great importance should be attached to the growth and development of alfalfa and the
number of plants.
Organic fertilizers improve the physical properties of the soil, regulate the moisture absorption
and moisture retention capacity of soil aggregates, and continuously provide the plant with the
necessary organic matter, contributing to the uniform growth and development of cotton and
increasing the activity of beneficial microorganisms in the soil.
With a sufficient amount of organic fertilizers, the soil's thermal regime improves, and the soil is
preserved in granular state. In this case, good opportunities are created for obtaining a high yield
of cotton.
Alfalfa yield of different ages
So
il
ty
pe
by
m
ec
ha
ni
ca
lc
om
po
sit
io
n
A
lfa
lfa
ro
ot
nu
m
be
r
in
th
e
3r
d
ye
ar
(th
ou
sa
nd
)
Obtained alfalfa yield
c/ha
Root
mass
accumulation (0-50 cm)
c/ha
A
cc
um
ul
at
ed
ni
tro
ge
n,
kg
A
cc
um
ul
at
ed
or
ga
ni
c
m
at
te
r(
hu
m
us
)
0-
50
cm
,c
/h
a
1st
year
2nd
year
3rd
year
4th
year
1st
year
2nd
year
3rd
year
Average
850
3-330 140-
150
160-
170
110-
120
45-50 98-
105
115-
120
445 325-
310
-//-
1020
1010
64-70 160-
164
165-
172
-
10-80 106-
123
155-
177
520 325
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-//-
800-
820
30-35 130-
140
160-
170
-
43-47 103-
120
118-
129
422 400-
422
Heavy
805
870
50-58 123-
152
152-
154
121-
130
30-40 93-
100
103-
134
530 340-
375
-//-
650-
665
43-51 124-
131
132-
136
-
37-43 81-86 91-
103
470 320-
330
-//-
650-
665
43-51 124-
131
132-
136
-
37-43 81-86 91-
1036
470 320-
330
Thus, the application of organic fertilizers and the introduction of crop rotation are the basis for
increasing soil fertility.
Conclusion.
Improving soil productivity is a multifaceted process that requires a deep
understanding of the soil's physical, chemical, and biological characteristics. This study
emphasizes that maintaining soil health through balanced nutrient management, enhancement of
organic matter, proper pH regulation, and sustainable farming practices is essential for long-term
agricultural productivity. Techniques such as crop rotation, conservation tillage, and the use of
both organic and mineral fertilizers contribute significantly to enhancing soil fertility and
structure. Importantly, soil productivity cannot be improved through a single method or input.
Instead, an integrated approach that combines good agricultural practices with site-specific soil
management strategies is vital. By prioritizing soil as a living and dynamic resource, farmers and
land managers can ensure not only higher yields but also the sustainability of ecosystems and
food systems. The fundamentals discussed provide a strong foundation for the development of
resilient and productive soils in both current and future agricultural landscapes.
References
1. Ismailov U.E., Sadikov E. Features of air circulation intensification. // Seed Rotations - the
Basis for Increasing Crop Yields and Land Fertility. // Proceedings of KKNIIZ - Issue. 14 -
Nukus "Bilim" 1992 - P. 13-16.
2. Namozov F.B. Improvement of short-rotation sowing systems to increase soil fertility and
cotton yield. // Abstract of the dissertation for the degree of Doctor of Agricultural Sciences. -
Tashkent. 2016. - 76 p.
3. Namozov F.B., Iminov A.A. Influence of crop rotation of cotton, winter wheat, repeated and
intermediate crops on soil fertility. // journal "Agroilm" - Tashkent. 2016 - No. 4 (42) - P. 21-22.
4. Sadikov E. Intensification of fodder fields of cotton rotations on meadow soils of
Karakalpakstan. // Abstract of the dissertation for the degree of Candidate of Agricultural
Sciences. - Tashkent. 1993 - 20 p.
5. Turdishev B., Sadikov E., Berdikeev B., Nazarimbetov I. Influence of forage crops on the
agrochemical properties of soil in clean and compacted sowing. // "Agroilm" journal. - Tashkent.
- 2019. - No. 3 (59) - P. 97-98.
6. Khalikov B.M. Namozov F.B. Scientific Basis of Crop Rotation. // monograph. Tashkent. -
2016. - 222 p.
7. Methods of agrophysical research of soils of Central Asia // 4th ed.
Tashkent. - Soyuz NIXI - 1973. - 132 p.
