Crop residue management techniques include zero tillage, reduced tillage using a rotavator, and conventional tillage using a mouldboard plow. Returning crop residues to fields provides various benefits like increased soil organic matter, water retention, and nutrient cycling. However, burning residues leads to losses of nitrogen, phosphorus, potassium, sulfur, carbon and other nutrients. The presentation discusses the impact of different crop residue management practices on soil fertility parameters like organic carbon, available nutrients, bulk density and productivity. Field experiments show that incorporating crop residues alone or with green manures increases soil organic carbon and available potassium while decreasing bulk density, with positive effects on rice yield.

1. MMDU MULLANA
AMBALA
Name
Class
Roll No.
Sem/year
Seminar Topic
__
__
__
__
Prince
M. Sc. Agronomy (Ag.)
26207006
2nd /1st
__Impact
of Crop Residual
Managment On Soil Fertility and
Productivity
Presentation By

2. Introduction
> Once a crop is harvested, farmers have to decide
what to do with the remaining crop residue (the above
ground biomass that is cut but not harvested). Residues
can be either exported and valorised as co-products
(e.g., animal fodder, biogas production), or restored to
the soil as such or after being burnt. Returning straw
directly to the field has been promoted as a source of
organic matter and a way to increase soil water holding
capacity and its overall quality. As such, it is thought to
help maintain, or even to some extent restore, soil
fertility .

3. Impact of Crop Residue Managment
> If the residues are returned to the soil, farmers have to
choose how to manage them using either conventional tillage
or alternatives such as reduced tillage.
>We define conventional
tillage as a tillage based on
mouldboard ploughing
which is commonly used in
temperate regions and
reduced tillage as a tillage
with reduced intensity
and/or depth

4. Crop Residues Managment Techniques

5. Crop Residue Managment Devices
Zero tillage with
com fertilizer Mulcher Happy Seeder
Mouldboard Rotavator

8. Benefits of Crop Residues Managment
If Crop Residue mix in the field Nutrient content
are
>By protecting the soil surface, surface crusting is also
reduced, improving infiltration and decreasing runoff.
>This effect conserves soil and water and reduces risks to
the environment.
>The residue mulch further conserves water by reducing
evaporation from the soil surface.
>The decaying residue feeds soil microbes and
earthworms, cycling the nutrients and building soil
structure.
 One tonne crop residue mixed in the field given Nutrients
 Nitrogen 10-15kg, pottas 30-40kg, Sulphur 5-7kg and organic
Carbon 600-800kg

9. Effect of crop residue management practices, nitrogen and potassium
levels on yield and nutrient uptake in rice-wheat cropping system

10. Losses of Crop Residues Burning

12. By burning one tonne crop residue produce
gasses
 According to NPMCR, it is reported that
burning of one ton of straw accounts for the
loss of entire amount of organic carbon
Nutrients kg Approximately
Nitrogen 5.5kg 80%
Phosphorus 2.3 kg 25%
Potassium 25kg 20%
Sulphur 1.2kg 50%
60kg Carbon monoxide ,1460kg Carbondioxide
199 kg Ashes(Raakh), 2kg Sulphur Dioxide

13. : Potential of utilization of crop residues in state power plants of Punjab and
Haryana

14. Impact of Crop Residual Managment On Soil
Fertility and Productivity
> Effects of crop residues and their management on
physical, chemical and biological parameters of soil quality
and overall soil fertility
> Efficient management of crop residues in the field
includes conservation of soil and its resources with
minimum adverse effects on the environment .After
harvesting of the crops, crop residues can be
(1) left on the soil surface,
(2) swathed and concentrated in windrows,
(3) incorporated into soil, and/or
(4) burnt prior to tillage or seedbed preparation.

15. This review mainly focus on the role of different crop
residue management practices as well as the quantity and
quality of crop residues in governing the chemical, physical,
and biological parameters of soil quality. A better understanding
of these aspects of soil fertility will help in maximizing the
beneficial effects of crop residues on agricultural soils (such as
minimizing soil degradation, increasing soil fertility through build-
up of soil organic matter), and to minimize the negative effects
(such as immobilization of nutrients, leaching and their run-off
losses and erosion), thus contributing directly towards
sustainable agricultural production systems.

16. >>Crop residues that are partially or wholly removed from field
can also be used as mulches, composts, industrial raw material,
household fuel, bio-fuel generation and fodder for animals that
gives excretory material in the form of dung thereby returning
residues to the field as animal wastes
>>Retaining of harvested crop residues in sufficient amounts on the
soil surface together with no tillage, or its partial incorporation by
minimal tillage (conservation tillage) decreases water and wind
erosion

17. Crop Residue Managment In Rice Crop
Field experiments were conducted on a sandy clay loam soil (deep
aquic ustorthent) for five consecutive seasons from wet season
(WS) 1998 to WS 2000 with a permanent layout at the Directorate of
Rice Research (DRR) farm, ICRISAT (International Crop Research
Institute for the Semi-Arid Tropics) campus, India, to study the
influence of incorporation of rice straw residues alone
> Combination with in situ grown green manure (GM) and straw
burning on soil fertility, irrigated rice productivity and pest incidence
in comparison with only fertiliser application (control). The residue
treatments received uniform doses of N, K, Zn at the same level as
that in control plots. The crop residue treatments favourably
influenced some of the soil parameters over control.

18. >Recycling of crop residues by incorporation or
burning increased soil available K and organic
carbon significantly over control, while total N
content increased by residue incorporation.
> Bulk density decreased with residue
incorporation as compared to control and
burning treatments.
>Yellow stem borer was the only pest observed,
with higher white ear damage recorded during
wet seasons ranging from 14.2–31.3% in 1999
and 16.8–29.7% in 2000.

19. >The damage was higher with straw + green
manure, apparently reflecting the quantum of N
applied through crop residues and fertilisers.
>The influence of crop residue treatments on
yield parameters like panicle and spikelet
number was more apparent after two cycles of
residue incorporation, recording significant
effects on rice productivity in the dry and wet
seasons of 2000. Rice yield increased by 1.0 to
1.2 t/ha in DS and 0.4 to 0.8 t/ha in WS.

20. Thank you